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David Rientjes 08ab9b10d4 mm, oom: force oom kill on sysrq+f 
The oom killer chooses not to kill a thread if:

 - an eligible thread has already been oom killed and has yet to exit,
   and

 - an eligible thread is exiting but has yet to free all its memory and
   is not the thread attempting to currently allocate memory.

SysRq+F manually invokes the global oom killer to kill a memory-hogging
task.  This is normally done as a last resort to free memory when no
progress is being made or to test the oom killer itself.

For both uses, we always want to kill a thread and never defer.  This
patch causes SysRq+F to always kill an eligible thread and can be used to
force a kill even if another oom killed thread has failed to exit.

Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2012-03-21 17:54:58 -07:00
..
accessibility vt:tackle kbd_table 2012-03-08 10:50:35 -08:00
acpi ACPI: remove duplicated lines of merging problems with acpi_processor_start 2012-02-08 16:17:10 -08:00
amba
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ata ata: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:16 +08:00
atm eni: fix driver remove function and driver probe error path. 2012-03-16 23:13:20 -07:00
auxdisplay
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base Core device tree changes for Linux v3.4 2012-03-21 10:30:03 -07:00
bcma bcma: silence PMU warning for BCM4331 2012-03-07 13:56:37 -05:00
block Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
bluetooth Bluetooth: Adding USB device 13d3:3375 as an Atheros AR3012. 2012-03-08 02:16:24 -03:00
cdrom cdrom: move shared static to cdrom_device_info 2012-02-08 20:03:14 +01:00
char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-03-20 21:12:50 -07:00
clk
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clocksource Power management updates for 3.4 2012-03-21 10:15:51 -07:00
connector
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cpufreq powernow-k6: Really enable auto-loading 2012-02-13 15:26:03 -08:00
cpuidle Merge branch 'perf/urgent' into perf/core 2012-03-05 09:20:08 +01:00
crypto Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
dca
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devfreq PM / devfreq: add relation of recommended frequency. 2012-03-17 21:51:34 +01:00
dio
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dma Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-03-20 21:12:50 -07:00
edac edac: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:17 +08:00
eisa
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firewire
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firmware
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gpio irq_domain/powerpc: Replace custom xlate functions with library functions 2012-02-16 06:11:24 -07:00
gpu Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2012-03-20 21:11:42 -07:00
hv Tools: hv: Support enumeration from all the pools 2012-03-16 13:36:04 -07:00
hwmon hwmon changes for v3.4 2012-03-21 10:37:25 -07:00
hwspinlock
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i2c i2c-algo-bit: Fix spurious SCL timeouts under heavy load 2012-03-15 18:11:05 +01:00
ide ide: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:17 +08:00
idle drivers/idle/intel_idle.c: fix confusing code identation 2012-03-21 17:54:54 -07:00
ieee802154
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infiniband InfiniBand/RDMA changes for the 3.4 merge window. Nothing big really 2012-03-21 10:33:42 -07:00
input driver core merge for 3.4-rc1 2012-03-20 11:16:20 -07:00
iommu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-03-20 21:12:50 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
leds drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmax 2012-02-08 19:03:51 -08:00
lguest
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macintosh Core device tree changes for Linux v3.4 2012-03-21 10:30:03 -07:00
mca
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md Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
media Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
memstick memstick: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:19 +08:00
message
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mfd regulator: Updates for 3.4 2012-03-21 10:34:56 -07:00
misc tty and serial merge for 3.4-rc1 2012-03-20 11:24:39 -07:00
mmc Power management updates for 3.4 2012-03-21 10:15:51 -07:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-03-20 21:12:50 -07:00
net InfiniBand/RDMA changes for the 3.4 merge window. Nothing big really 2012-03-21 10:33:42 -07:00
nfc NFC: Remove the rf mode parameter from the DEP link up routine 2012-03-06 15:16:23 -05:00
nubus
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of Core device tree changes for Linux v3.4 2012-03-21 10:30:03 -07:00
oprofile
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parisc [PARISC] include <linux/prefetch.h> in drivers/parisc/iommu-helpers.h 2012-02-27 09:44:15 -06:00
parport
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pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
pcmcia Merge 3.3-rc6 into driver-core-next 2012-03-09 12:35:53 -08:00
pinctrl
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platform Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-03-20 21:12:50 -07:00
pnp
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power Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-03-20 21:12:50 -07:00
pps pps: class_create() returns an ERR_PTR, not NULL 2012-03-05 15:49:43 -08:00
ps3
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ptp phc: Update author's email address. 2012-03-17 01:41:43 -07:00
rapidio rapidio/tsi721: fix bug in register offset definitions 2012-03-15 17:03:03 -07:00
regulator regulator: Updates for 3.4 2012-03-21 10:34:56 -07:00
rtc Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-03-20 10:32:09 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
sbus
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scsi Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
sfi
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sh
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sn
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spi SPI changes for v3.4. 2012-03-21 10:32:00 -07:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
staging Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
target Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
tc
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thermal
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tty mm, oom: force oom kill on sysrq+f 2012-03-21 17:54:58 -07:00
uio
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usb USB merge for 3.4-rc1 2012-03-20 11:26:30 -07:00
uwb
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vhost vhost: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:21 +08:00
video drivers/video/backlight/s6e63m0.c: fix corruption storing gamma mode 2012-03-15 17:03:04 -07:00
virt
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virtio virtio: balloon: leak / fill balloon across S4 2012-03-01 09:28:41 +10:30
vlynq
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w1 DS2781 Maxim Stand-Alone Fuel Gauge battery and w1 slave drivers 2012-03-08 11:15:33 -08:00
watchdog watchdog: fix GETTIMEOUT ioctl in booke_wdt 2012-02-29 09:46:13 +01:00
xen Merge branch 'pm-sleep' 2012-03-04 23:11:14 +01:00
zorro
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Kconfig telephony: Move to staging 2012-02-08 16:58:04 -08:00
Makefile staging: fix the build breakage cuased by telephony drivers 2012-02-09 09:07:46 -08:00