linux/kernel/power
Rafael J. Wysocki 452aa6999e mm/pm: force GFP_NOIO during suspend/hibernation and resume
There are quite a few GFP_KERNEL memory allocations made during
suspend/hibernation and resume that may cause the system to hang, because
the I/O operations they depend on cannot be completed due to the
underlying devices being suspended.

Avoid this problem by clearing the __GFP_IO and __GFP_FS bits in
gfp_allowed_mask before suspend/hibernation and restoring the original
values of these bits in gfp_allowed_mask durig the subsequent resume.

[akpm@linux-foundation.org: fix CONFIG_PM=n linkage]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06 11:26:26 -08:00
..
Kconfig PM: Add facility for advanced testing of async suspend/resume 2010-02-26 20:39:10 +01:00
Makefile PM / Hibernate: Shift remaining code from swsusp.c to hibernate.c 2009-12-06 16:16:07 +01:00
console.c vt: introduce and use vt_kmsg_redirect() function 2009-12-15 08:53:28 -08:00
hibernate.c mm/pm: force GFP_NOIO during suspend/hibernation and resume 2010-03-06 11:26:26 -08:00
hibernate_nvs.c PM/Hibernate: Move NVS routines into a seperate file (v2). 2009-06-12 21:32:33 +02:00
main.c PM: Add a switch for disabling/enabling asynchronous suspend/resume 2010-02-26 20:39:10 +01:00
power.h PM/Hibernate: Do not release preallocated memory unnecessarily (rev. 2) 2009-09-14 20:26:58 +02:00
poweroff.c trivial: kernel/power/poweroff.c: whitespace fix 2009-06-12 18:01:46 +02:00
process.c PM / freezer: Don't get over-anxious while waiting 2009-10-28 22:53:09 +01:00
snapshot.c PM / Hibernate: Fix preallocating of memory 2010-02-26 20:39:13 +01:00
suspend.c mm/pm: force GFP_NOIO during suspend/hibernation and resume 2010-03-06 11:26:26 -08:00
suspend_test.c PM: Make warning in suspend_test_finish() less likely to happen 2009-10-22 08:23:45 +09:00
swap.c PM / Hibernate: Swap, remove useless check from swsusp_read() 2010-02-26 20:39:11 +01:00
user.c PM / Hibernate: Really deprecate deprecated user ioctls 2010-02-26 20:39:11 +01:00