6c262608dd
Before this change we had two flavours of vm_domainset iterators: "page" and "malloc". The latter was only used for kmem_*() and hard-coded its behaviour based on kernel_object's policy. Moreover, its use contained a race similar to that fixed by r338755 since the kernel_object's iterator was being run without the object lock. In some cases it is useful to be able to explicitly specify a policy (domainset) or policy+iterator (domainset_ref) when performing memory allocations. To that end, refactor the vm_dominset_* KPI to permit this, and get rid of the "malloc" domainset_iter KPI in the process. Reviewed by: jeff (previous version) Tested by: pho (part of a larger patch) MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D17417
56 lines
2.2 KiB
C
56 lines
2.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2017, Jeffrey Roberson <jeff@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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#ifndef __VM_DOMAINSET_H__
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#define __VM_DOMAINSET_H__
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struct vm_domainset_iter {
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struct domainset *di_domain;
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unsigned int *di_iter;
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vm_pindex_t di_offset;
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int di_flags;
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uint16_t di_policy;
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domainid_t di_n;
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bool di_minskip;
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};
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int vm_domainset_iter_page(struct vm_domainset_iter *, struct vm_object *,
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int *);
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void vm_domainset_iter_page_init(struct vm_domainset_iter *,
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struct vm_object *, vm_pindex_t, int *, int *);
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int vm_domainset_iter_policy(struct vm_domainset_iter *, int *);
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void vm_domainset_iter_policy_init(struct vm_domainset_iter *,
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struct domainset *, int *, int *);
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void vm_domainset_iter_policy_ref_init(struct vm_domainset_iter *,
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struct domainset_ref *, int *, int *);
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void vm_wait_doms(const domainset_t *);
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#endif /* __VM_DOMAINSET_H__ */
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