736 lines
22 KiB
C
736 lines
22 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002, 2003, 2004, 2005 Jeffrey Roberson <jeff@FreeBSD.org>
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* Copyright (c) 2004, 2005 Bosko Milekic <bmilekic@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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/*
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* uma.h - External definitions for the Universal Memory Allocator
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*
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*/
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#ifndef _VM_UMA_H_
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#define _VM_UMA_H_
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#include <sys/param.h> /* For NULL */
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#include <sys/malloc.h> /* For M_* */
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#include <sys/_smr.h>
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/* User visible parameters */
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#define UMA_SMALLEST_UNIT 8 /* Smallest item allocated */
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/* Types and type defs */
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struct uma_zone;
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/* Opaque type used as a handle to the zone */
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typedef struct uma_zone * uma_zone_t;
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/*
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* Item constructor
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*
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* Arguments:
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* item A pointer to the memory which has been allocated.
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* arg The arg field passed to uma_zalloc_arg
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* size The size of the allocated item
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* flags See zalloc flags
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*
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* Returns:
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* 0 on success
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* errno on failure
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*
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* Discussion:
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* The constructor is called just before the memory is returned
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* to the user. It may block if necessary.
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*/
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typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags);
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/*
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* Item destructor
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*
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* Arguments:
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* item A pointer to the memory which has been allocated.
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* size The size of the item being destructed.
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* arg Argument passed through uma_zfree_arg
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*
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* Returns:
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* Nothing
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*
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* Discussion:
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* The destructor may perform operations that differ from those performed
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* by the initializer, but it must leave the object in the same state.
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* This IS type stable storage. This is called after EVERY zfree call.
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*/
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typedef void (*uma_dtor)(void *mem, int size, void *arg);
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/*
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* Item initializer
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*
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* Arguments:
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* item A pointer to the memory which has been allocated.
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* size The size of the item being initialized.
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* flags See zalloc flags
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*
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* Returns:
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* 0 on success
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* errno on failure
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*
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* Discussion:
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* The initializer is called when the memory is cached in the uma zone.
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* The initializer and the destructor should leave the object in the same
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* state.
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*/
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typedef int (*uma_init)(void *mem, int size, int flags);
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/*
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* Item discard function
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*
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* Arguments:
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* item A pointer to memory which has been 'freed' but has not left the
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* zone's cache.
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* size The size of the item being discarded.
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*
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* Returns:
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* Nothing
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*
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* Discussion:
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* This routine is called when memory leaves a zone and is returned to the
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* system for other uses. It is the counter-part to the init function.
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*/
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typedef void (*uma_fini)(void *mem, int size);
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/*
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* Import new memory into a cache zone.
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*/
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typedef int (*uma_import)(void *arg, void **store, int count, int domain,
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int flags);
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/*
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* Free memory from a cache zone.
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*/
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typedef void (*uma_release)(void *arg, void **store, int count);
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/*
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* What's the difference between initializing and constructing?
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*
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* The item is initialized when it is cached, and this is the state that the
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* object should be in when returned to the allocator. The purpose of this is
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* to remove some code which would otherwise be called on each allocation by
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* utilizing a known, stable state. This differs from the constructor which
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* will be called on EVERY allocation.
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*
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* For example, in the initializer you may want to initialize embedded locks,
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* NULL list pointers, set up initial states, magic numbers, etc. This way if
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* the object is held in the allocator and re-used it won't be necessary to
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* re-initialize it.
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*
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* The constructor may be used to lock a data structure, link it on to lists,
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* bump reference counts or total counts of outstanding structures, etc.
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*
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*/
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/* Function proto types */
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/*
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* Create a new uma zone
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*
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* Arguments:
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* name The text name of the zone for debugging and stats. This memory
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* should not be freed until the zone has been deallocated.
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* size The size of the object that is being created.
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* ctor The constructor that is called when the object is allocated.
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* dtor The destructor that is called when the object is freed.
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* init An initializer that sets up the initial state of the memory.
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* fini A discard function that undoes initialization done by init.
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* ctor/dtor/init/fini may all be null, see notes above.
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* align A bitmask that corresponds to the requested alignment
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* eg 4 would be 0x3
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* flags A set of parameters that control the behavior of the zone.
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*
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* Returns:
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* A pointer to a structure which is intended to be opaque to users of
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* the interface. The value may be null if the wait flag is not set.
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*/
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uma_zone_t uma_zcreate(const char *name, size_t size, uma_ctor ctor,
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uma_dtor dtor, uma_init uminit, uma_fini fini,
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int align, uint32_t flags);
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/*
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* Create a secondary uma zone
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*
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* Arguments:
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* name The text name of the zone for debugging and stats. This memory
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* should not be freed until the zone has been deallocated.
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* ctor The constructor that is called when the object is allocated.
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* dtor The destructor that is called when the object is freed.
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* zinit An initializer that sets up the initial state of the memory
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* as the object passes from the Keg's slab to the Zone's cache.
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* zfini A discard function that undoes initialization done by init
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* as the object passes from the Zone's cache to the Keg's slab.
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*
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* ctor/dtor/zinit/zfini may all be null, see notes above.
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* Note that the zinit and zfini specified here are NOT
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* exactly the same as the init/fini specified to uma_zcreate()
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* when creating a primary zone. These zinit/zfini are called
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* on the TRANSITION from keg to zone (and vice-versa). Once
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* these are set, the primary zone may alter its init/fini
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* (which are called when the object passes from VM to keg)
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* using uma_zone_set_init/fini()) as well as its own
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* zinit/zfini (unset by default for primary zone) with
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* uma_zone_set_zinit/zfini() (note subtle 'z' prefix).
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*
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* primary A reference to this zone's Primary Zone which contains the
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* backing Keg for the Secondary Zone being added.
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*
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* Returns:
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* A pointer to a structure which is intended to be opaque to users of
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* the interface. The value may be null if the wait flag is not set.
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*/
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uma_zone_t uma_zsecond_create(const char *name, uma_ctor ctor, uma_dtor dtor,
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uma_init zinit, uma_fini zfini, uma_zone_t primary);
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/*
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* Create cache-only zones.
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*
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* This allows uma's per-cpu cache facilities to handle arbitrary
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* pointers. Consumers must specify the import and release functions to
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* fill and destroy caches. UMA does not allocate any memory for these
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* zones. The 'arg' parameter is passed to import/release and is caller
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* specific.
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*/
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uma_zone_t uma_zcache_create(const char *name, int size, uma_ctor ctor,
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uma_dtor dtor, uma_init zinit, uma_fini zfini, uma_import zimport,
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uma_release zrelease, void *arg, int flags);
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/*
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* Definitions for uma_zcreate flags
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*
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* These flags share space with UMA_ZFLAGs in uma_int.h. Be careful not to
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* overlap when adding new features.
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*/
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#define UMA_ZONE_ZINIT 0x0002 /* Initialize with zeros */
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#define UMA_ZONE_CONTIG 0x0004 /*
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* Physical memory underlying an object
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* must be contiguous.
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*/
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#define UMA_ZONE_NOTOUCH 0x0008 /* UMA may not access the memory */
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#define UMA_ZONE_MALLOC 0x0010 /* For use by malloc(9) only! */
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#define UMA_ZONE_NOFREE 0x0020 /* Do not free slabs of this type! */
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#define UMA_ZONE_MTXCLASS 0x0040 /* Create a new lock class */
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#define UMA_ZONE_VM 0x0080 /*
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* Used for internal vm datastructures
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* only.
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*/
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#define UMA_ZONE_NOTPAGE 0x0100 /* allocf memory not vm pages */
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#define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */
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#define UMA_ZONE_NOBUCKET 0x0400 /* Do not use buckets. */
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#define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets. */
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#define UMA_ZONE_MINBUCKET 0x1000 /* Use smallest buckets. */
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#define UMA_ZONE_CACHESPREAD 0x2000 /*
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* Spread memory start locations across
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* all possible cache lines. May
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* require many virtually contiguous
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* backend pages and can fail early.
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*/
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#define UMA_ZONE_NODUMP 0x4000 /*
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* Zone's pages will not be included in
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* mini-dumps.
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*/
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#define UMA_ZONE_PCPU 0x8000 /*
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* Allocates mp_maxid + 1 slabs of
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* PAGE_SIZE
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*/
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#define UMA_ZONE_FIRSTTOUCH 0x10000 /* First touch NUMA policy */
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#define UMA_ZONE_ROUNDROBIN 0x20000 /* Round-robin NUMA policy. */
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#define UMA_ZONE_SMR 0x40000 /*
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* Safe memory reclamation defers
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* frees until all read sections
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* have exited. This flag creates
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* a unique SMR context for this
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* zone. To share contexts see
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* uma_zone_set_smr() below.
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*
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* See sys/smr.h for more details.
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*/
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/* In use by UMA_ZFLAGs: 0xffe00000 */
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/*
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* These flags are shared between the keg and zone. Some are determined
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* based on physical parameters of the request and may not be provided by
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* the consumer.
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*/
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#define UMA_ZONE_INHERIT \
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(UMA_ZONE_NOTOUCH | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \
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UMA_ZONE_VM | UMA_ZONE_NOTPAGE | UMA_ZONE_PCPU | \
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UMA_ZONE_FIRSTTOUCH | UMA_ZONE_ROUNDROBIN)
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/* Definitions for align */
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#define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */
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#define UMA_ALIGN_LONG (sizeof(long) - 1) /* "" long */
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#define UMA_ALIGN_INT (sizeof(int) - 1) /* "" int */
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#define UMA_ALIGN_SHORT (sizeof(short) - 1) /* "" short */
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#define UMA_ALIGN_CHAR (sizeof(char) - 1) /* "" char */
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#define UMA_ALIGN_CACHE (0 - 1) /* Cache line size align */
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#define UMA_ALIGNOF(type) (_Alignof(type) - 1) /* Alignment fit for 'type' */
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#define UMA_ANYDOMAIN -1 /* Special value for domain search. */
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/*
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* Destroys an empty uma zone. If the zone is not empty uma complains loudly.
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*
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* Arguments:
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* zone The zone we want to destroy.
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*
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*/
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void uma_zdestroy(uma_zone_t zone);
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/*
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* Allocates an item out of a zone
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*
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* Arguments:
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* zone The zone we are allocating from
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* arg This data is passed to the ctor function
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* flags See sys/malloc.h for available flags.
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*
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* Returns:
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* A non-null pointer to an initialized element from the zone is
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* guaranteed if the wait flag is M_WAITOK. Otherwise a null pointer
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* may be returned if the zone is empty or the ctor failed.
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*/
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void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags);
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/* Allocate per-cpu data. Access the correct data with zpcpu_get(). */
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void *uma_zalloc_pcpu_arg(uma_zone_t zone, void *arg, int flags);
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/* Use with SMR zones. */
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void *uma_zalloc_smr(uma_zone_t zone, int flags);
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/*
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* Allocate an item from a specific NUMA domain. This uses a slow path in
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* the allocator but is guaranteed to allocate memory from the requested
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* domain if M_WAITOK is set.
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*
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* Arguments:
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* zone The zone we are allocating from
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* arg This data is passed to the ctor function
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* domain The domain to allocate from.
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* flags See sys/malloc.h for available flags.
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*/
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void *uma_zalloc_domain(uma_zone_t zone, void *arg, int domain, int flags);
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/*
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* Allocates an item out of a zone without supplying an argument
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*
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* This is just a wrapper for uma_zalloc_arg for convenience.
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*
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*/
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static __inline void *uma_zalloc(uma_zone_t zone, int flags);
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static __inline void *uma_zalloc_pcpu(uma_zone_t zone, int flags);
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static __inline void *
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uma_zalloc(uma_zone_t zone, int flags)
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{
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return uma_zalloc_arg(zone, NULL, flags);
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}
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static __inline void *
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uma_zalloc_pcpu(uma_zone_t zone, int flags)
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{
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return uma_zalloc_pcpu_arg(zone, NULL, flags);
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}
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/*
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* Frees an item back into the specified zone.
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*
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* Arguments:
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* zone The zone the item was originally allocated out of.
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* item The memory to be freed.
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* arg Argument passed to the destructor
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*
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* Returns:
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* Nothing.
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*/
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void uma_zfree_arg(uma_zone_t zone, void *item, void *arg);
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/* Use with PCPU zones. */
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void uma_zfree_pcpu_arg(uma_zone_t zone, void *item, void *arg);
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/* Use with SMR zones. */
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void uma_zfree_smr(uma_zone_t zone, void *item);
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/*
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* Frees an item back to a zone without supplying an argument
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*
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* This is just a wrapper for uma_zfree_arg for convenience.
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*
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*/
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static __inline void uma_zfree(uma_zone_t zone, void *item);
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static __inline void uma_zfree_pcpu(uma_zone_t zone, void *item);
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static __inline void
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uma_zfree(uma_zone_t zone, void *item)
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{
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uma_zfree_arg(zone, item, NULL);
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}
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static __inline void
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uma_zfree_pcpu(uma_zone_t zone, void *item)
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{
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uma_zfree_pcpu_arg(zone, item, NULL);
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}
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/*
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* Wait until the specified zone can allocate an item.
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*/
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void uma_zwait(uma_zone_t zone);
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/*
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* Backend page supplier routines
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*
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* Arguments:
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* zone The zone that is requesting pages.
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* size The number of bytes being requested.
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* pflag Flags for these memory pages, see below.
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* domain The NUMA domain that we prefer for this allocation.
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* wait Indicates our willingness to block.
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*
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* Returns:
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* A pointer to the allocated memory or NULL on failure.
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*/
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typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, int domain,
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uint8_t *pflag, int wait);
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/*
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* Backend page free routines
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*
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* Arguments:
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* item A pointer to the previously allocated pages.
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* size The original size of the allocation.
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* pflag The flags for the slab. See UMA_SLAB_* below.
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*
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* Returns:
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* None
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*/
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typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag);
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/*
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* Reclaims unused memory
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*
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* Arguments:
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* req Reclamation request type.
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* Returns:
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* None
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*/
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#define UMA_RECLAIM_DRAIN 1 /* release bucket cache */
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#define UMA_RECLAIM_DRAIN_CPU 2 /* release bucket and per-CPU caches */
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#define UMA_RECLAIM_TRIM 3 /* trim bucket cache to WSS */
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void uma_reclaim(int req);
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void uma_zone_reclaim(uma_zone_t, int req);
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/*
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* Sets the alignment mask to be used for all zones requesting cache
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* alignment. Should be called by MD boot code prior to starting VM/UMA.
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*
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* Arguments:
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* align The alignment mask
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*
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* Returns:
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* Nothing
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*/
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void uma_set_align(int align);
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/*
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* Set a reserved number of items to hold for M_USE_RESERVE allocations. All
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* other requests must allocate new backing pages.
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*/
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void uma_zone_reserve(uma_zone_t zone, int nitems);
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/*
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* Reserves the maximum KVA space required by the zone and configures the zone
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* to use a VM_ALLOC_NOOBJ-based backend allocator.
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*
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* Arguments:
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* zone The zone to update.
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* nitems The upper limit on the number of items that can be allocated.
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*
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* Returns:
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* 0 if KVA space can not be allocated
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* 1 if successful
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*
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* Discussion:
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* When the machine supports a direct map and the zone's items are smaller
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* than a page, the zone will use the direct map instead of allocating KVA
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* space.
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*/
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int uma_zone_reserve_kva(uma_zone_t zone, int nitems);
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/*
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* Sets a high limit on the number of items allowed in a zone
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*
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* Arguments:
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* zone The zone to limit
|
|
* nitems The requested upper limit on the number of items allowed
|
|
*
|
|
* Returns:
|
|
* int The effective value of nitems
|
|
*/
|
|
int uma_zone_set_max(uma_zone_t zone, int nitems);
|
|
|
|
/*
|
|
* Sets a high limit on the number of items allowed in zone's bucket cache
|
|
*
|
|
* Arguments:
|
|
* zone The zone to limit
|
|
* nitems The requested upper limit on the number of items allowed
|
|
*/
|
|
void uma_zone_set_maxcache(uma_zone_t zone, int nitems);
|
|
|
|
/*
|
|
* Obtains the effective limit on the number of items in a zone
|
|
*
|
|
* Arguments:
|
|
* zone The zone to obtain the effective limit from
|
|
*
|
|
* Return:
|
|
* 0 No limit
|
|
* int The effective limit of the zone
|
|
*/
|
|
int uma_zone_get_max(uma_zone_t zone);
|
|
|
|
/*
|
|
* Sets a warning to be printed when limit is reached
|
|
*
|
|
* Arguments:
|
|
* zone The zone we will warn about
|
|
* warning Warning content
|
|
*
|
|
* Returns:
|
|
* Nothing
|
|
*/
|
|
void uma_zone_set_warning(uma_zone_t zone, const char *warning);
|
|
|
|
/*
|
|
* Sets a function to run when limit is reached
|
|
*
|
|
* Arguments:
|
|
* zone The zone to which this applies
|
|
* fx The function ro run
|
|
*
|
|
* Returns:
|
|
* Nothing
|
|
*/
|
|
typedef void (*uma_maxaction_t)(uma_zone_t, int);
|
|
void uma_zone_set_maxaction(uma_zone_t zone, uma_maxaction_t);
|
|
|
|
/*
|
|
* Obtains the approximate current number of items allocated from a zone
|
|
*
|
|
* Arguments:
|
|
* zone The zone to obtain the current allocation count from
|
|
*
|
|
* Return:
|
|
* int The approximate current number of items allocated from the zone
|
|
*/
|
|
int uma_zone_get_cur(uma_zone_t zone);
|
|
|
|
/*
|
|
* The following two routines (uma_zone_set_init/fini)
|
|
* are used to set the backend init/fini pair which acts on an
|
|
* object as it becomes allocated and is placed in a slab within
|
|
* the specified zone's backing keg. These should probably not
|
|
* be changed once allocations have already begun, but only be set
|
|
* immediately upon zone creation.
|
|
*/
|
|
void uma_zone_set_init(uma_zone_t zone, uma_init uminit);
|
|
void uma_zone_set_fini(uma_zone_t zone, uma_fini fini);
|
|
|
|
/*
|
|
* The following two routines (uma_zone_set_zinit/zfini) are
|
|
* used to set the zinit/zfini pair which acts on an object as
|
|
* it passes from the backing Keg's slab cache to the
|
|
* specified Zone's bucket cache. These should probably not
|
|
* be changed once allocations have already begun, but only be set
|
|
* immediately upon zone creation.
|
|
*/
|
|
void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit);
|
|
void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini);
|
|
|
|
/*
|
|
* Replaces the standard backend allocator for this zone.
|
|
*
|
|
* Arguments:
|
|
* zone The zone whose backend allocator is being changed.
|
|
* allocf A pointer to the allocation function
|
|
*
|
|
* Returns:
|
|
* Nothing
|
|
*
|
|
* Discussion:
|
|
* This could be used to implement pageable allocation, or perhaps
|
|
* even DMA allocators if used in conjunction with the OFFPAGE
|
|
* zone flag.
|
|
*/
|
|
|
|
void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf);
|
|
|
|
/*
|
|
* Used for freeing memory provided by the allocf above
|
|
*
|
|
* Arguments:
|
|
* zone The zone that intends to use this free routine.
|
|
* freef The page freeing routine.
|
|
*
|
|
* Returns:
|
|
* Nothing
|
|
*/
|
|
|
|
void uma_zone_set_freef(uma_zone_t zone, uma_free freef);
|
|
|
|
/*
|
|
* Associate a zone with a smr context that is allocated after creation
|
|
* so that multiple zones may share the same context.
|
|
*/
|
|
void uma_zone_set_smr(uma_zone_t zone, smr_t smr);
|
|
|
|
/*
|
|
* Fetch the smr context that was set or made in uma_zcreate().
|
|
*/
|
|
smr_t uma_zone_get_smr(uma_zone_t zone);
|
|
|
|
/*
|
|
* These flags are setable in the allocf and visible in the freef.
|
|
*/
|
|
#define UMA_SLAB_BOOT 0x01 /* Slab alloced from boot pages */
|
|
#define UMA_SLAB_KERNEL 0x04 /* Slab alloced from kmem */
|
|
#define UMA_SLAB_PRIV 0x08 /* Slab alloced from priv allocator */
|
|
/* 0x02, 0x10, 0x40, and 0x80 are available */
|
|
|
|
/*
|
|
* Used to pre-fill a zone with some number of items
|
|
*
|
|
* Arguments:
|
|
* zone The zone to fill
|
|
* itemcnt The number of items to reserve
|
|
*
|
|
* Returns:
|
|
* Nothing
|
|
*
|
|
* NOTE: This is blocking and should only be done at startup
|
|
*/
|
|
void uma_prealloc(uma_zone_t zone, int itemcnt);
|
|
|
|
/*
|
|
* Used to determine if a fixed-size zone is exhausted.
|
|
*
|
|
* Arguments:
|
|
* zone The zone to check
|
|
*
|
|
* Returns:
|
|
* Non-zero if zone is exhausted.
|
|
*/
|
|
int uma_zone_exhausted(uma_zone_t zone);
|
|
|
|
/*
|
|
* Returns the bytes of memory consumed by the zone.
|
|
*/
|
|
size_t uma_zone_memory(uma_zone_t zone);
|
|
|
|
/*
|
|
* Common UMA_ZONE_PCPU zones.
|
|
*/
|
|
extern uma_zone_t pcpu_zone_4;
|
|
extern uma_zone_t pcpu_zone_8;
|
|
extern uma_zone_t pcpu_zone_16;
|
|
extern uma_zone_t pcpu_zone_32;
|
|
extern uma_zone_t pcpu_zone_64;
|
|
|
|
/*
|
|
* Exported statistics structures to be used by user space monitoring tools.
|
|
* Statistics stream consists of a uma_stream_header, followed by a series of
|
|
* alternative uma_type_header and uma_type_stat structures.
|
|
*/
|
|
#define UMA_STREAM_VERSION 0x00000001
|
|
struct uma_stream_header {
|
|
uint32_t ush_version; /* Stream format version. */
|
|
uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */
|
|
uint32_t ush_count; /* Number of records. */
|
|
uint32_t _ush_pad; /* Pad/reserved field. */
|
|
};
|
|
|
|
#define UTH_MAX_NAME 32
|
|
#define UTH_ZONE_SECONDARY 0x00000001
|
|
struct uma_type_header {
|
|
/*
|
|
* Static per-zone data, some extracted from the supporting keg.
|
|
*/
|
|
char uth_name[UTH_MAX_NAME];
|
|
uint32_t uth_align; /* Keg: alignment. */
|
|
uint32_t uth_size; /* Keg: requested size of item. */
|
|
uint32_t uth_rsize; /* Keg: real size of item. */
|
|
uint32_t uth_maxpages; /* Keg: maximum number of pages. */
|
|
uint32_t uth_limit; /* Keg: max items to allocate. */
|
|
|
|
/*
|
|
* Current dynamic zone/keg-derived statistics.
|
|
*/
|
|
uint32_t uth_pages; /* Keg: pages allocated. */
|
|
uint32_t uth_keg_free; /* Keg: items free. */
|
|
uint32_t uth_zone_free; /* Zone: items free. */
|
|
uint32_t uth_bucketsize; /* Zone: desired bucket size. */
|
|
uint32_t uth_zone_flags; /* Zone: flags. */
|
|
uint64_t uth_allocs; /* Zone: number of allocations. */
|
|
uint64_t uth_frees; /* Zone: number of frees. */
|
|
uint64_t uth_fails; /* Zone: number of alloc failures. */
|
|
uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */
|
|
uint64_t uth_xdomain; /* Zone: Number of cross domain frees. */
|
|
uint64_t _uth_reserved1[1]; /* Reserved. */
|
|
};
|
|
|
|
struct uma_percpu_stat {
|
|
uint64_t ups_allocs; /* Cache: number of allocations. */
|
|
uint64_t ups_frees; /* Cache: number of frees. */
|
|
uint64_t ups_cache_free; /* Cache: free items in cache. */
|
|
uint64_t _ups_reserved[5]; /* Reserved. */
|
|
};
|
|
|
|
void uma_reclaim_wakeup(void);
|
|
void uma_reclaim_worker(void *);
|
|
|
|
unsigned long uma_limit(void);
|
|
|
|
/* Return the amount of memory managed by UMA. */
|
|
unsigned long uma_size(void);
|
|
|
|
/* Return the amount of memory remaining. May be negative. */
|
|
long uma_avail(void);
|
|
|
|
#endif /* _VM_UMA_H_ */
|