diff options
| author | Prashant Gaikwad <pgaikwad@nvidia.com> | 2013-08-12 16:09:13 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 13:44:01 -0700 |
| commit | af141cc49eb867c7f885052b29006de44c6d19e9 (patch) | |
| tree | e21792858af267f39061fd56fe19f255e9b742d8 /include/linux/mm.h | |
| parent | aaf289f838d57bc2670447d2b9fafa88c85fb025 (diff) | |
UPSTREAM arch: mm: pass userspace fault flag to generic fault handler
Unlike global OOM handling, memory cgroup code will invoke the OOM killer
in any OOM situation because it has no way of telling faults occuring in
kernel context - which could be handled more gracefully - from
user-triggered faults.
Pass a flag that identifies faults originating in user space from the
architecture-specific fault handlers to generic code so that memcg OOM
handling can be improved.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: azurIt <azurit@pobox.sk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit 407c454cb0ac6e68ca66974da787a71118cfef84)
Conflicts:
arch/arc/mm/fault.c
arch/arm64/mm/fault.c
arch/metag/mm/fault.c
arch/parisc/mm/fault.c
Change-Id: Iee53942737627be8dd8e2e325b5ba87fe85d6814
Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Reviewed-on: http://git-master/r/266410
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index bd5679ddcd3f..bd8a403b3279 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -167,6 +167,7 @@ extern pgprot_t protection_map[16]; #define FAULT_FLAG_RETRY_NOWAIT 0x10 /* Don't drop mmap_sem and wait when retrying */ #define FAULT_FLAG_KILLABLE 0x20 /* The fault task is in SIGKILL killable region */ #define FAULT_FLAG_TRIED 0x40 /* second try */ +#define FAULT_FLAG_USER 0x80 /* The fault originated in userspace */ /* * vm_fault is filled by the the pagefault handler and passed to the vma's |