Johannes Weiner 4942642080 mm: memcg: handle non-error OOM situations more gracefully ... Commit 3812c8c8f3 ("mm: memcg: do not trap chargers with full callstack on OOM") assumed that only a few places that can trigger a memcg OOM situation do not return VM_FAULT_OOM, like optional page cache readahead. But there are many more and it's impractical to annotate them all. First of all, we don't want to invoke the OOM killer when the failed allocation is gracefully handled, so defer the actual kill to the end of the fault handling as well. This simplifies the code quite a bit for added bonus. Second, since a failed allocation might not be the abrupt end of the fault, the memcg OOM handler needs to be re-entrant until the fault finishes for subsequent allocation attempts. If an allocation is attempted after the task already OOMed, allow it to bypass the limit so that it can quickly finish the fault and invoke the OOM killer. Reported-by: azurIt <azurit@pobox.sk> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-10-16 21:35:53 -07:00
..
acpi
asm-generic	mm: Fix generic hugetlb pte check return type.	2013-10-02 20:02:35 -04:00
clocksource	ARM: SoC cleanups for 3.12	2013-09-06 13:21:16 -07:00
crypto
drm	Revert "drm: mark context support as a legacy subsystem"	2013-09-20 08:32:59 +10:00
dt-bindings	ARM: dts: Fix pinctrl mask for omap3	2013-10-08 10:37:29 -07:00
keys
kvm
linux	mm: memcg: handle non-error OOM situations more gracefully	2013-10-16 21:35:53 -07:00
math-emu
media	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-09-05 14:54:29 -07:00
memory
misc
net	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf	2013-10-01 12:39:35 -04:00
pcmcia
ras
rdma	Merge branches 'cxgb4', 'flowsteer', 'ipoib', 'iser', 'mlx4', 'ocrdma' and 'qib' into for-next	2013-09-03 09:01:08 -07:00
rxrpc
scsi	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2013-09-12 16:11:45 -07:00
sound	sound fixes for 3.12-rc1	2013-09-12 08:52:41 -07:00
target	target/iscsi: Bump versions to v4.1.0	2013-09-10 20:23:37 -07:00
trace	Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block	2013-09-22 15:00:11 -07:00
uapi	Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux	2013-09-29 10:02:40 -07:00
video	fbdev changes for 3.12:	2013-09-05 09:49:32 -07:00
xen	Features:	2013-09-04 17:45:39 -07:00
Kbuild