David Howells 165b239270 [PATCH] NOMMU: make SYSV SHM nattch work correctly ... Make the SYSV SHM nattch counter work correctly by forcing multiple VMAs to be produced to represent MAP_SHARED segments, even if they overlap exactly. Using this test program: http://people.redhat.com/~dhowells/doshm.c Run as: doshm sysv I can see nattch going from one before the patch: # /doshm sysv Command: sysv shmid: 65536 memory: 0xc3700000 c0b00000-c0b04000 rw-p 00000000 00:00 0 c0bb0000-c0bba788 r-xs 00000000 00:0b 14582157 /lib/ld-uClibc-0.9.28.so c3180000-c31dede4 r-xs 00000000 00:0b 14582179 /lib/libuClibc-0.9.28.so c3520000-c352278c rw-p 00000000 00:0b 13763417 /doshm c3584000-c35865e8 r-xs 00000000 00:0b 13763417 /doshm c3588000-c358aa00 rw-p 00008000 00:0b 14582157 /lib/ld-uClibc-0.9.28.so c3590000-c359b6c0 rw-p 00000000 00:00 0 c3620000-c3640000 rwxp 00000000 00:00 0 c3700000-c37fa000 rw-S 00000000 00:06 1411 /SYSV00000000 (deleted) c3700000-c37fa000 rw-S 00000000 00:06 1411 /SYSV00000000 (deleted) nattch 1 To two after the patch: # /doshm sysv Command: sysv shmid: 0 memory: 0xc3700000 c0bb0000-c0bba788 r-xs 00000000 00:0b 14582157 /lib/ld-uClibc-0.9.28.so c3180000-c31dede4 r-xs 00000000 00:0b 14582179 /lib/libuClibc-0.9.28.so c3320000-c3340000 rwxp 00000000 00:00 0 c3530000-c35325e8 r-xs 00000000 00:0b 13763417 /doshm c3534000-c353678c rw-p 00000000 00:0b 13763417 /doshm c3538000-c353aa00 rw-p 00008000 00:0b 14582157 /lib/ld-uClibc-0.9.28.so c3590000-c359b6c0 rw-p 00000000 00:00 0 c35a4000-c35a8000 rw-p 00000000 00:00 0 c3700000-c37fa000 rw-S 00000000 00:06 1369 /SYSV00000000 (deleted) c3700000-c37fa000 rw-S 00000000 00:06 1369 /SYSV00000000 (deleted) nattch 2 That's +1 to nattch for each shmat() made. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-03-22 19:39:06 -07:00
..
allocpercpu.c	[PATCH] Allow NULL pointers in percpu_free	2006-12-07 08:39:22 -08:00
backing-dev.c	[PATCH] nfs: fix congestion control	2007-03-16 19:25:05 -07:00
bootmem.c	[PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols	2006-12-07 08:39:44 -08:00
bounce.c	[PATCH] blktrace: only add a bounce trace when we really bounce	2007-01-12 10:46:49 -08:00
fadvise.c	[PATCH] mm: change uses of f_{dentry,vfsmnt} to use f_path	2006-12-08 08:28:43 -08:00
filemap_xip.c	[PATCH] mm: mremap correct rmap accounting	2007-01-30 08:33:32 -08:00
filemap.c	[PATCH] dio: invalidate clean pages before dio write	2007-03-16 19:25:04 -07:00
filemap.h	Remove all inclusions of <linux/config.h>	2006-10-04 03:38:54 -04:00
fremap.c	[PATCH] mm: more rmap debugging	2006-12-22 08:55:49 -08:00
highmem.c	[PATCH] Use ZVC for free_pages	2007-02-11 10:51:17 -08:00
hugetlb.c	[PATCH] hugetlb: preserve hugetlb pte dirty state	2007-02-09 09:25:46 -08:00
internal.h	[PATCH] mm: VM_BUG_ON	2006-09-26 08:48:44 -07:00
Kconfig	[PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA	2007-02-11 10:51:19 -08:00
madvise.c	[PATCH] mm: fix madvise infinine loop	2007-03-16 19:25:04 -07:00
Makefile	[PATCH] separate bdi congestion functions from queue congestion functions	2006-10-20 10:26:35 -07:00
memory_hotplug.c	[PATCH] Fix sparsemem on Cell	2007-01-11 18:18:20 -08:00
memory.c	[PATCH] Add NOPFN_REFAULT result from vm_ops->nopfn()	2007-02-12 09:48:27 -08:00
mempolicy.c	[PATCH] Page migration: Fix vma flag checking	2007-03-05 07:57:51 -08:00
mempool.c	[PATCH] Numerous fixes to kernel-doc info in source files.	2007-02-11 10:51:32 -08:00
migrate.c	[PATCH] Page migration: Fix vma flag checking	2007-03-05 07:57:51 -08:00
mincore.c	[PATCH] mincore: vma crossing fix	2007-02-15 09:57:03 -08:00
mlock.c	[PATCH] mlock cleanup	2006-12-07 08:39:22 -08:00
mmap.c	[PATCH] Bug in MM_RB debugging	2007-03-01 14:53:38 -08:00
mmzone.c	[PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols	2006-12-07 08:39:44 -08:00
mprotect.c	[PATCH] paravirt: lazy mmu mode hooks.patch	2006-10-01 00:39:33 -07:00
mremap.c	[PATCH] mm: mremap correct rmap accounting	2007-01-30 08:33:32 -08:00
msync.c	[PATCH] mm: msync() cleanup	2006-09-26 08:48:45 -07:00
nommu.c	[PATCH] NOMMU: make SYSV SHM nattch work correctly	2007-03-22 19:39:06 -07:00
oom_kill.c	[PATCH] oom fix: prevent oom from killing a process with children/sibling unkillable	2007-03-16 19:25:06 -07:00
page_alloc.c	[PATCH] Rename PG_checked to PG_owner_priv_1	2007-03-01 14:53:37 -08:00
page_io.c	[PATCH] swsusp: use block device offsets to identify swap locations	2006-12-07 08:39:27 -08:00
page-writeback.c	[PATCH] throttle_vm_writeout(): don't loop on GFP_NOFS and GFP_NOIO allocations	2007-03-01 14:53:38 -08:00
pdflush.c	[PATCH] Add include/linux/freezer.h and move definitions from sched.h	2006-12-07 08:39:27 -08:00
prio_tree.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
readahead.c	[PATCH] Drop __get_zone_counts()	2007-02-11 10:51:18 -08:00
rmap.c	[PATCH] adapt page_lock_anon_vma() to PREEMPT_RCU	2007-03-01 14:53:39 -08:00
shmem_acl.c	[PATCH] Fix typos in mm/shmem_acl.c	2006-10-11 11:14:23 -07:00
shmem.c	[PATCH] shmem and simple const super_operations	2007-03-05 07:57:51 -08:00
slab.c	[PATCH] kernel-doc fixes for 2.6.20-git15 (non-drivers)	2007-03-01 14:53:37 -08:00
slob.c	[PATCH] MM: SLOB is broken by recent cleanup of slab.h	2006-12-30 10:56:42 -08:00
sparse.c	[PATCH] numa node ids are int, page_to_nid and zone_to_nid should return int	2006-12-07 08:39:23 -08:00
swap_state.c	[PATCH] lockdep: locking init debugging improvement	2006-07-03 15:27:02 -07:00
swap.c	[PATCH] hotplug CPU: clean up hotcpu_notifier() use	2006-12-07 08:39:39 -08:00
swapfile.c	[PATCH] swsusp: Do not fail if resume device is not set	2007-01-05 23:55:22 -08:00
thrash.c	[PATCH] make mm/thrash.c:global_faults static	2006-12-07 08:39:22 -08:00
tiny-shmem.c	[PATCH] mm/{,tiny-}shmem.c cleanups	2007-03-01 14:53:35 -08:00
truncate.c	[PATCH] VM: invalidate_inode_pages2_range() should not exit early	2007-03-01 14:53:39 -08:00
util.c	[PATCH] slab: clean up leak tracking ifdefs a little bit	2006-10-04 07:55:13 -07:00
vmalloc.c	[PATCH] Numerous fixes to kernel-doc info in source files.	2007-02-11 10:51:32 -08:00
vmscan.c	[PATCH] throttle_vm_writeout(): don't loop on GFP_NOFS and GFP_NOIO allocations	2007-03-01 14:53:38 -08:00
vmstat.c	[PATCH] optional ZONE_DMA: optional ZONE_DMA in the VM	2007-02-11 10:51:18 -08:00