kib 732157ce21 Vm map code performs clipping when map entry covers region which is ...

larger than the operational region.  If the op region size is zero,
clipping would create a zero-sized map entry.  The result is that vm
map splay starts behaving inconsistently, sometimes returning
zero-sized entry, sometimes the next (or previous) entry.

One step further, it could result in e.g. vm_map_wire() setting
MAP_ENTRY_IN_TRANSITION on the zero-sized entry, but failing to clear
it in the done part.  The vm_map_delete() than hangs forever waiting
for the flag removal.

Verify for zero-length requests and act as if it is always successfull
without performing any action on the address space.

Diagnosed by:	pho
Tested by:	pho (previous version)
Reviewed by:	alc (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

2013-11-20 09:03:48 +00:00

..

_vm_radix.h

On all the architectures, avoid to preallocate the physical memory

2013-08-09 11:28:55 +00:00

default_pager.c

Rename VM_OBJECT_LOCK(), VM_OBJECT_UNLOCK() and VM_OBJECT_TRYLOCK() to

2013-02-20 12:03:20 +00:00

device_pager.c

Different consumers of the struct vm_page abuse pageq member to keep

2013-08-10 17:36:42 +00:00

memguard.c

- Add a statically allocated memguard arena since it is needed very early

2013-08-13 22:40:43 +00:00

memguard.h

Replace kernel virtual address space allocation with vmem. This provides

2013-08-07 06:21:20 +00:00

phys_pager.c

The soft and hard busy mechanism rely on the vm object lock to work.

2013-08-09 11:11:11 +00:00

pmap.h

The pmap function pmap_clear_reference() is no longer used. Remove it.

2013-09-20 04:30:18 +00:00

redzone.c

MFC

2011-11-08 11:08:40 +00:00

redzone.h

…

sg_pager.c

Different consumers of the struct vm_page abuse pageq member to keep

2013-08-10 17:36:42 +00:00

swap_pager.c

Remove the deprecated VM_ALLOC_RETRY flag for the vm_page_grab(9).

2013-08-22 07:39:53 +00:00

swap_pager.h

Do not map the swap i/o pbufs if the geom provider for the swap

2013-03-19 14:39:27 +00:00

uma_core.c

Implement mechanism to safely but slowly purge UMA per-CPU caches.

2013-11-19 10:51:46 +00:00

uma_dbg.c

- Add a per-zone lock for zones without kegs.

2013-06-20 19:08:12 +00:00

uma_dbg.h

…

uma_int.h

Implement soft pressure on UMA cache bucket sizes.

2013-11-19 10:05:53 +00:00

uma.h

- Resolve bucket recursion issues by passing a cookie with zone flags

2013-06-26 00:57:38 +00:00

vm_extern.h

Merge the following changes from projects/bhyve_npt_pmap:

2013-09-20 17:06:49 +00:00

vm_fault.c

Revert back to use int for the page counts. In vn_io_fault(), the i/o

2013-11-20 08:45:26 +00:00

vm_glue.c

Remove the deprecated VM_ALLOC_RETRY flag for the vm_page_grab(9).

2013-08-22 07:39:53 +00:00

vm_init.c

Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use

2013-09-09 18:11:59 +00:00

vm_kern.c

Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use

2013-09-09 18:11:59 +00:00

vm_kern.h

- Add a statically allocated memguard arena since it is needed very early

2013-08-13 22:40:43 +00:00

vm_map.c

Vm map code performs clipping when map entry covers region which is

2013-11-20 09:03:48 +00:00

vm_map.h

Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use

2013-09-09 18:11:59 +00:00

vm_meter.c

Rename VM_OBJECT_LOCK(), VM_OBJECT_UNLOCK() and VM_OBJECT_TRYLOCK() to

2013-02-20 12:03:20 +00:00

vm_mmap.c

Extend the support for exempting processes from being killed when swap is

2013-09-19 18:53:42 +00:00

vm_object.c

Do not coalesce if the swap object belongs to tmpfs vnode. The

2013-11-05 06:18:50 +00:00

vm_object.h

On all the architectures, avoid to preallocate the physical memory

2013-08-09 11:28:55 +00:00

vm_page.c

PG_SLAB no longer serves a useful purpose, since m->object is no

2013-09-17 07:35:26 +00:00

vm_page.h

PG_SLAB no longer serves a useful purpose, since m->object is no

2013-09-17 07:35:26 +00:00

vm_pageout.c

If filesystem declares that it supports shared locking for writes, use

2013-11-09 20:36:29 +00:00

vm_pageout.h

Move what remains of vm/vm_contig.c into vm/vm_pageout.c, where similar

2012-07-18 05:21:34 +00:00

vm_pager.c

- Add a general purpose resource allocator, vmem, from NetBSD. It was

2013-06-28 03:51:20 +00:00

vm_pager.h

- Add a general purpose resource allocator, vmem, from NetBSD. It was

2013-06-28 03:51:20 +00:00

vm_param.h

Remove unused definition for CTL_VM_NAMES.

2013-08-09 23:47:43 +00:00

vm_phys.c

Tidy up the output of "sysctl vm.phys_free".

2013-10-10 16:11:45 +00:00

vm_phys.h

Split the pagequeues per NUMA domains, and split pageademon process

2013-08-07 16:36:38 +00:00

vm_radix.c

Addendum to r254141: The call to vm_radix_insert() in vm_page_cache() can

2013-08-23 17:27:12 +00:00

vm_radix.h

Addendum to r254141: The call to vm_radix_insert() in vm_page_cache() can

2013-08-23 17:27:12 +00:00

vm_reserv.c

PG_SLAB no longer serves a useful purpose, since m->object is no

2013-09-17 07:35:26 +00:00

vm_reserv.h

Refactor vm_page_alloc()'s interactions with vm_reserv_alloc_page() and

2013-05-12 16:50:18 +00:00

vm_unix.c

- Improve readability of sys_obreak().

2013-01-11 09:58:35 +00:00

vm_zeroidle.c

Split the pagequeues per NUMA domains, and split pageademon process

2013-08-07 16:36:38 +00:00

vm.h

rename scheduler->swapper and SI_SUB_RUN_SCHEDULER->SI_SUB_LAST

2013-07-24 09:45:31 +00:00

vnode_pager.c

The soft and hard busy mechanism rely on the vm object lock to work.

2013-08-09 11:11:11 +00:00

vnode_pager.h

Account the writeable shared mappings backed by file in the vnode

2012-02-23 21:07:16 +00:00