linux/drivers/staging
David Rientjes 83dbbdbb38 android, lowmemorykiller: remove task handoff notifier
The task handoff notifier leaks task_struct since it never gets freed
after the callback returns NOTIFY_OK, which means it is responsible for
doing so.

It turns out the lowmemorykiller actually doesn't need this notifier at
all.  It's used to prevent unnecessary killing by waiting for a thread
to exit as a result of lowmem_shrink(), however, it's possible to do
this in the same way the kernel oom killer works by setting TIF_MEMDIE
and avoid killing if we're still waiting for it to exit.

The kernel oom killer will already automatically set TIF_MEMDIE for
threads that are attempting to allocate memory that have a fatal signal.
The thread selected by lowmem_shrink() will have such a signal after the
lowmemorykiller sends it a SIGKILL, so this won't result in an
unnecessary use of memory reserves for the thread to exit.

This has the added benefit that we don't have to rely on
CONFIG_PROFILING to prevent needlessly killing tasks.

Reported-by: Werner Landgraf <w.landgraf@ru.ru>
Cc: stable@vger.kernel.org
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Colin Cross <ccross@android.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-04-09 20:48:44 -07:00
..
android android, lowmemorykiller: remove task handoff notifier 2012-04-09 20:48:44 -07:00
asus_oled Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
bcm Staging: bcm: fix possible memory leak of 'pstAddIndication' in CmHost.c and removes a whitespace 2012-03-02 16:36:55 -08:00
comedi Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
cptm1217
crystalhd Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
cxt1e1 Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging 2012-01-09 12:18:17 -08:00
echo
et131x Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
frontier Staging: frontier: Fix checkpatch.pl issue. 2012-02-24 12:03:12 -08:00
ft1000 Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
iio The following text was taken from the original review request: 2012-03-24 10:24:31 -07:00
keucr USB merge for 3.4-rc1 2012-03-20 11:26:30 -07:00
line6 staging: line6: separate handling of buffer allocation and stream startup 2012-02-09 09:14:35 -08:00
media Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
mei watchdog: fix set_timeout operations 2012-03-27 20:08:09 +02:00
nvec staging: nvec: Fix Kconfig dependencies 2012-01-31 10:28:00 -08:00
octeon staging/octeon: Fix PHY binding in octeon-ethernet driver. 2012-02-24 12:03:15 -08:00
olpc_dcon
omapdrm staging: drm/omap: use current time for page-flip event 2012-03-13 15:44:44 -07:00
ozwpan staging: ozwpan depends on NET 2012-03-14 12:14:26 -07:00
panel Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
phison
quatech_usb2 USB: serial: quatech_usb2.c: use module_usb_serial_driver 2012-02-28 13:11:27 -08:00
quickstart Staging: quickstart: Fix compilation warning on 64 bit arch 2012-02-13 20:08:56 -08:00
ramster Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
rtl8187se usermodehelper: use UMH_WAIT_PROC consistently 2012-03-23 16:58:41 -07:00
rtl8192e usermodehelper: use UMH_WAIT_PROC consistently 2012-03-23 16:58:41 -07:00
rtl8192u Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
rtl8712 staging: r8712u: Fix Smatch warning 2012-03-07 13:36:45 -08:00
rts5139 staging: Update TODO for rts5139 and rts_pstor 2012-02-24 12:03:14 -08:00
rts_pstor staging: Update TODO for rts5139 and rts_pstor 2012-02-24 12:03:14 -08:00
sbe-2t3e3 Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
sep staging: Fix SEP build 2012-02-13 14:42:02 -08:00
serial
serqt_usb2 USB: serial: serqt_usb2.c: use module_usb_serial_driver 2012-02-28 13:11:30 -08:00
slicoss staging: clean up Greg's email address in some TODO files 2012-02-15 14:45:40 -08:00
sm7xx includecheck: delete any duplicate instances of module.h 2012-02-28 19:31:56 -05:00
speakup TTY: speakup, do not use serialP 2012-03-08 11:47:02 -08:00
ste_rmi4 ARM: More device tree support updates 2012-03-28 12:34:33 -07:00
telephony Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
tidspbridge Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
usbip Staging: usbip: Remove commented code. 2012-02-24 11:59:57 -08:00
vme staging: vme: fix section mismatches in linux-next 20120314 2012-03-15 14:04:34 -07:00
vt6655 staging: Fix typo in bssdb.c 2012-02-24 12:05:37 -08:00
vt6656 staging: Fix typo in bssdb.c 2012-02-24 12:05:37 -08:00
winbond
wlags49_h2 Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
wlags49_h25
wlan-ng Staging: wlan-ng: still setting wrong data 2012-02-29 15:55:52 -08:00
xgifb staging/xgifb: remove remaining duplicate initdef.h defines 2012-02-10 09:56:25 -08:00
zcache Cleanups: rename of flush to invalidate, moving reporting of statistics 2012-03-22 19:52:47 -07:00
zram Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
zsmalloc staging: zsmalloc: remove SPARSEMEM dep from Kconfig 2012-03-07 13:31:28 -08:00
Kconfig Merge branch 'drm-nouveau-destage' of git://people.freedesktop.org/~airlied/linux 2012-03-22 13:27:02 -07:00
Makefile staging: ozwpan: Plumbed in Kconfig and Kbuild 2012-02-24 09:29:24 -08:00
staging.c