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linux/drivers/misc/sgi-gru
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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
..
Makefile misc: change to new flag variable 2011-03-17 14:05:34 +01:00
gru.h gru: improve GRU TLB dropin statistics 2009-12-16 07:20:17 -08:00
gru_instructions.h Add #includes needed to permit the removal of asm/system.h 2012-03-28 18:30:03 +01:00
grufault.c sanitize <linux/prefetch.h> usage 2011-05-20 12:50:29 -07:00
grufile.c mm: kill vma flag VM_RESERVED and mm->reserved_vm counter 2012-10-09 16:22:19 +09:00
gruhandles.c gru: preload tlb for bcopy instructions 2009-12-16 07:20:16 -08:00
gruhandles.h gru: update GRU structures to match latest hardware spec 2009-12-16 07:20:16 -08:00
grukdump.c gru: add debug option for cache flushing 2009-12-16 07:20:15 -08:00
grukservices.c drivers/misc: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:54 -04:00
grukservices.h X86: uv: implement a gru_read_gpa kernel function 2009-12-16 07:20:13 -08:00
grulib.h gru: improve GRU TLB dropin statistics 2009-12-16 07:20:17 -08:00
grumain.c sanitize <linux/prefetch.h> usage 2011-05-20 12:50:29 -07:00
gruprocfs.c switch procfs to umode_t use 2012-01-03 22:54:56 -05:00
grutables.h Fix common misspellings 2011-03-31 11:26:23 -03:00
grutlbpurge.c gru: add additional GRU statistics 2009-12-16 07:20:16 -08:00