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| author | Johannes Weiner <hannes@cmpxchg.org> | 2013-09-12 15:13:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 15:38:01 -0700 |
| commit | 871341023c771ad233620b7a1fb3d9c7031c4e5c (patch) | |
| tree | f2b008756dffce639759f74885b23e92886600d6 /arch/um/kernel/trap.c | |
| parent | 94bce453c78996cc4373d5da6cfabe07fcc6d9f9 (diff) | |
| download | linux-871341023c771ad233620b7a1fb3d9c7031c4e5c.tar.gz linux-871341023c771ad233620b7a1fb3d9c7031c4e5c.tar.bz2 linux-871341023c771ad233620b7a1fb3d9c7031c4e5c.zip | |
arch: mm: do not invoke OOM killer on kernel fault OOM
Kernel faults are expected to handle OOM conditions gracefully (gup,
uaccess etc.), so they should never invoke the OOM killer. Reserve this
for faults triggered in user context when it is the only option.
Most architectures already do this, fix up the remaining few.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: azurIt <azurit@pobox.sk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/kernel/trap.c')
| -rw-r--r-- | arch/um/kernel/trap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 089f3987e273..b2f5adf838dd 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -124,6 +124,8 @@ out_of_memory: * (which will retry the fault, or kill us if we got oom-killed). */ up_read(&mm->mmap_sem); + if (!is_user) + goto out_nosemaphore; pagefault_out_of_memory(); return 0; } |