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Sagi Grimberg 21a92735f6 mm: mmu_notifier: have mmu_notifiers use a global SRCU so they may safely schedule 
With an RCU based mmu_notifier implementation, any callout to
mmu_notifier_invalidate_range_{start,end}() or
mmu_notifier_invalidate_page() would not be allowed to call schedule()
as that could potentially allow a modification to the mmu_notifier
structure while it is currently being used.

Since srcu allocs 4 machine words per instance per cpu, we may end up
with memory exhaustion if we use srcu per mm.  So all mms share a global
srcu.  Note that during large mmu_notifier activity exit & unregister
paths might hang for longer periods, but it is tolerable for current
mmu_notifier clients.

Signed-off-by: Sagi Grimberg <sagig@mellanox.co.il>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Haggai Eran <haggaie@mellanox.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-09 16:22:23 +09:00
..
backing-dev.c
vfs: kill write_super and sync_supers
2012-08-04 01:24:44 +04:00
bootmem.c
bootmem: Fix the short description of reserve_bootmem()
2012-08-27 07:57:21 -07:00
bounce.c
bounce: allow use of bounce pool via config option
2012-07-18 16:40:35 -04:00
cleancache.c
->encode_fh() API change
2012-05-29 23:28:33 -04:00
compaction.c
mm: compaction: capture a suitable high-order page immediately when it is made available
2012-10-09 16:22:21 +09:00
debug-pagealloc.c
mm, x86: Remove debug_pagealloc_enabled
2011-12-06 09:24:07 +01:00
dmapool.c
mm: fix implicit stat.h usage in dmapool.c
2011-10-31 09:20:12 -04:00
fadvise.c
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
failslab.c
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
filemap_xip.c
mm: kill vma flag VM_CAN_NONLINEAR
2012-10-09 16:22:17 +09:00
filemap.c
mm: kill vma flag VM_CAN_NONLINEAR
2012-10-09 16:22:17 +09:00
fremap.c
mm: kill vma flag VM_CAN_NONLINEAR
2012-10-09 16:22:17 +09:00
frontswap.c
frontswap: support exclusive gets if tmem backend is capable
2012-09-21 10:38:12 -04:00
highmem.c
mm: add support for direct_IO to highmem pages
2012-07-31 18:42:47 -07:00
huge_memory.c
mm: kill vma flag VM_INSERTPAGE
2012-10-09 16:22:17 +09:00
hugetlb_cgroup.c
hugetlb/cgroup: remove exclude and wakeup rmdir calls from migrate
2012-07-31 18:42:41 -07:00
hugetlb.c
mm: hugetlbfs: close race during teardown of hugetlbfs shared page tables
2012-07-31 18:42:50 -07:00
hwpoison-inject.c
memcg: rename config variables
2012-07-31 18:42:43 -07:00
init-mm.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
internal.h
mm: compaction: capture a suitable high-order page immediately when it is made available
2012-10-09 16:22:21 +09:00
Kconfig
mm: factor out memory isolate functions
2012-07-31 18:42:45 -07:00
Kconfig.debug
mm: more intensive memory corruption debugging
2012-01-10 16:30:42 -08:00
kmemcheck.c
kmemcheck: Fix build errors due to missing slab.h
2010-03-30 22:02:32 +09:00
kmemleak-test.c
kmemleak: remove memset by using kzalloc
2011-01-27 18:31:51 +00:00
kmemleak.c
kmemleak: Replace list_for_each_continue_rcu with new interface
2012-09-23 07:42:52 -07:00
ksm.c
mm: kill vma flag VM_RESERVED and mm->reserved_vm counter
2012-10-09 16:22:19 +09:00
maccess.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
madvise.c
mm: prepare VM_DONTDUMP for using in drivers
2012-10-09 16:22:18 +09:00
Makefile
mm: factor out memory isolate functions
2012-07-31 18:42:45 -07:00
memblock.c
mm/memblock: Use NULL instead of 0 for pointers
2012-09-05 08:32:30 +02:00
memcontrol.c
cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them
2012-09-14 12:01:16 -07:00
memory_hotplug.c
memory hotplug: fix section info double registration bug
2012-09-17 15:00:38 -07:00
memory-failure.c
memcg: rename config variables
2012-07-31 18:42:43 -07:00
memory.c
mm: kill vma flag VM_RESERVED and mm->reserved_vm counter
2012-10-09 16:22:19 +09:00
mempolicy.c
mempolicy: fix a memory corruption by refcount imbalance in alloc_pages_vma()
2012-10-09 16:22:22 +09:00
mempool.c
mempool: add @gfp_mask to mempool_create_node()
2012-06-25 11:53:47 +02:00
migrate.c
mm: memcg: fix compaction/migration failing due to memcg limits
2012-07-31 18:42:48 -07:00
mincore.c
mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode
2012-03-21 17:54:54 -07:00
mlock.c
mm: kill vma flag VM_RESERVED and mm->reserved_vm counter
2012-10-09 16:22:19 +09:00
mm_init.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
mmap.c
mm/mmap.c: replace find_vma_prepare() with clearer find_vma_links()
2012-10-09 16:22:20 +09:00
mmu_context.c
mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()
2012-03-21 17:54:59 -07:00
mmu_notifier.c
mm: mmu_notifier: have mmu_notifiers use a global SRCU so they may safely schedule
2012-10-09 16:22:23 +09:00
mmzone.c
memcg: rename config variables
2012-07-31 18:42:43 -07:00
mprotect.c
Merge branch 'akpm' (Andrew's patch-bomb)
2012-03-22 09:04:48 -07:00
mremap.c
mm: account the total_vm in the vm_stat_account()
2012-07-31 18:42:39 -07:00
msync.c
sanitize vfs_fsync calling conventions
2010-05-21 18:31:21 -04:00
nobootmem.c
memblock: free allocated memblock_reserved_regions later
2012-07-11 16:04:50 -07:00
nommu.c
mm: kill vma flag VM_RESERVED and mm->reserved_vm counter
2012-10-09 16:22:19 +09:00
oom_kill.c
mm, memcg: move all oom handling to memcontrol.c
2012-07-31 18:42:45 -07:00
page_alloc.c
mm: compaction: capture a suitable high-order page immediately when it is made available
2012-10-09 16:22:21 +09:00
page_cgroup.c
memcg: rename config variables
2012-07-31 18:42:43 -07:00
page_io.c
mm: add support for direct_IO to highmem pages
2012-07-31 18:42:47 -07:00
page_isolation.c
memory-hotplug: fix kswapd looping forever problem
2012-07-31 18:42:45 -07:00
page-writeback.c
vfs: kill write_super and sync_supers
2012-08-04 01:24:44 +04:00
pagewalk.c
mm: fix kernel-doc warnings
2012-06-20 14:39:36 -07:00
percpu-km.c
percpu: clear memory allocated with the km allocator
2010-10-02 10:28:42 +03:00
percpu-vm.c
mm: fix kernel-doc warnings
2012-06-20 14:39:36 -07:00
percpu.c
sections: fix section conflicts in mm/percpu.c
2012-10-06 03:04:44 +09:00
pgtable-generic.c
arch/tile: allow building Linux with transparent huge pages enabled
2012-05-25 12:48:21 -04:00
prio_tree.c
sanitize <linux/prefetch.h> usage
2011-05-20 12:50:29 -07:00
process_vm_access.c
aio/vfs: cleanup of rw_copy_check_uvector() and compat_rw_copy_check_uvector()
2012-05-31 17:49:32 -07:00
quicklist.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
readahead.c
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
rmap.c
mm: remove swap token code
2012-05-29 16:22:19 -07:00
shmem.c
mm: kill vma flag VM_CAN_NONLINEAR
2012-10-09 16:22:17 +09:00
slab_common.c
Revert "mm/sl[aou]b: Move sysfs_slab_add to common"
2012-09-05 12:07:44 +03:00
slab.c
Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
2012-10-07 07:53:13 +09:00
slab.h
Revert "mm/sl[aou]b: Move sysfs_slab_add to common"
2012-09-05 12:07:44 +03:00
slob.c
Merge branch 'slab/tracing' into slab/for-linus
2012-10-03 09:57:17 +03:00
slub.c
Merge branch 'slab/common-for-cgroups' into slab/for-linus
2012-10-03 09:56:37 +03:00
sparse-vmemmap.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
sparse.c
mm/sparse: remove index_init_lock
2012-07-31 18:42:49 -07:00
swap_state.c
mm: add support for a filesystem to activate swap files and use direct_IO for writing swap pages
2012-07-31 18:42:47 -07:00
swap.c
mm: fix nonuniform page status when writing new file with small buffer
2012-10-09 16:22:19 +09:00
swapfile.c
mm: swapfile: clean up unuse_pte race handling
2012-07-31 18:42:48 -07:00
truncate.c
mm/fs: remove truncate_range
2012-05-29 16:22:23 -07:00
util.c
mm: Use __do_krealloc to do the krealloc job
2012-09-04 10:22:58 +03:00
vmalloc.c
mm: kill vma flag VM_RESERVED and mm->reserved_vm counter
2012-10-09 16:22:19 +09:00
vmscan.c
mm: vmscan: scale number of pages reclaimed by reclaim/compaction based on failures
2012-10-09 16:22:20 +09:00
vmstat.c
workqueue: make deferrable delayed_work initializer names consistent
2012-08-21 13:18:23 -07:00