Michal Hocko bb8a4b7fd1 mm, oom_reaper: hide oom reaped tasks from OOM killer more carefully ... Commit 36324a990c ("oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space") not only clears TIF_MEMDIE for oom reaped task but also set OOM_SCORE_ADJ_MIN for the target task to hide it from the oom killer. This works in simple cases but it is not sufficient for (unlikely) cases where the mm is shared between independent processes (as they do not share signal struct). If the mm had only small amount of memory which could be reaped then another task sharing the mm could be selected and that wouldn't help to move out from the oom situation. Introduce MMF_OOM_REAPED mm flag which is checked in oom_badness (same as OOM_SCORE_ADJ_MIN) and task is skipped if the flag is set. Set the flag after __oom_reap_task is done with a task. This will force the select_bad_process() to ignore all already oom reaped tasks as well as no such task is sacrificed for its parent. Signed-off-by: Michal Hocko <mhocko@suse.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-05-20 17:58:30 -07:00
..
acpi	Merge branches 'acpi-pci', 'acpi-misc' and 'acpi-tools'	2016-05-16 16:45:48 +02:00
asm-generic	Merge branch 'akpm' (patches from Andrew)	2016-05-19 20:00:06 -07:00
clocksource	clocksource: arm_arch_timer: Remove arch_timer_get_timecounter	2016-05-03 12:54:21 +02:00
crypto	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2016-05-19 09:21:36 -07:00
drm
dt-bindings	- New Drivers	2016-05-20 11:10:24 -07:00
keys
kvm	KVM: arm/arm64: vgic: Rely on the GIC driver to parse the firmware tables	2016-05-03 12:54:21 +02:00
linux	mm, oom_reaper: hide oom reaped tasks from OOM killer more carefully	2016-05-20 17:58:30 -07:00
math-emu
media	[media] media: rc: reduce size of struct ir_raw_event	2016-05-07 10:34:17 -03:00
memory
misc	cxl: Add kernel API to allow a context to operate with relocate disabled	2016-05-11 21:54:10 +10:00
net	switchdev: pass pointer to fib_info instead of copy	2016-05-17 13:58:49 -04:00
pcmcia
ras
rdma	IB/security: Restrict use of the write() interface	2016-04-28 12:03:16 -04:00
rxrpc
scsi
soc	ARC updates for 4.7-rc1	2016-05-19 09:46:18 -07:00
sound	ASoC: Updates for v4.7	2016-05-16 14:59:00 +02:00
target
trace	mm, compaction: distinguish between full and partial COMPACT_COMPLETE	2016-05-20 17:58:30 -07:00
uapi	Merge branch 'i2c/for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2016-05-19 17:48:12 -07:00
video	fbdev: sh_mipi_dsi: remove driver	2016-05-10 11:53:38 +03:00
xen
Kbuild