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linux/Documentation/vm
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Konstantin Khlebnikov 314e51b985 mm: kill vma flag VM_RESERVED and mm->reserved_vm counter 
A long time ago, in v2.4, VM_RESERVED kept swapout process off VMA,
currently it lost original meaning but still has some effects:

 | effect                 | alternative flags
-+------------------------+---------------------------------------------
1| account as reserved_vm | VM_IO
2| skip in core dump      | VM_IO, VM_DONTDUMP
3| do not merge or expand | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP
4| do not mlock           | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP

This patch removes reserved_vm counter from mm_struct.  Seems like nobody
cares about it, it does not exported into userspace directly, it only
reduces total_vm showed in proc.

Thus VM_RESERVED can be replaced with VM_IO or pair VM_DONTEXPAND | VM_DONTDUMP.

remap_pfn_range() and io_remap_pfn_range() set VM_IO|VM_DONTEXPAND|VM_DONTDUMP.
remap_vmalloc_range() set VM_DONTEXPAND | VM_DONTDUMP.

[akpm@linux-foundation.org: drivers/vfio/pci/vfio_pci.c fixup]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Kentaro Takeda <takedakn@nttdata.co.jp>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Venkatesh Pallipadi <venki@google.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-09 16:22:19 +09:00
..
.gitignore Documentation/vm/.gitignore: add page-types 2009-09-24 07:20:57 -07:00
00-INDEX slub: doc: update the slabinfo.c file path 2011-08-31 20:10:17 +03:00
active_mm.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
balance page allocator: use allocation flags as an index to the zone watermark 2009-06-16 19:47:35 -07:00
cleancache.txt Cleanups: rename of flush to invalidate, moving reporting of statistics 2012-03-22 19:52:47 -07:00
frontswap.txt mm/frontswap: cleanup doc and comment error 2012-07-23 11:16:20 -04:00
highmem.txt mm: highmem documentation 2010-10-26 16:52:08 -07:00
hugetlbpage.txt hugetlb: update hugetlbpage.txt 2012-08-21 16:45:03 -07:00
hwpoison.txt Documentation: update cgroupfs mount point 2011-06-15 21:52:50 -07:00
ksm.txt ksm: remove unswappable max_kernel_pages 2009-12-15 08:53:20 -08:00
locking mm: Convert i_mmap_lock to a mutex 2011-05-25 08:39:18 -07:00
numa doc: fix broken references 2011-09-27 18:08:04 +02:00
numa_memory_policy.txt Doc: Fix typo s/packages/packaged 2010-09-21 17:03:27 +02:00
overcommit-accounting Fix common misspellings 2011-03-31 11:26:23 -03:00
page_migration trivial: fix where cgroup documentation is not correctly referred to 2009-03-30 15:22:02 +02:00
pagemap.txt proc: report file/anon bit in /proc/pid/pagemap 2012-05-31 17:49:29 -07:00
slub.txt Documentations: Fix slabinfo.c directory in vm/slub.txt 2012-05-10 11:45:23 +03:00
transhuge.txt mm: document the meminfo and vmstat fields of relevance to transparent hugepages 2012-05-29 16:22:23 -07:00
unevictable-lru.txt mm: kill vma flag VM_RESERVED and mm->reserved_vm counter 2012-10-09 16:22:19 +09:00