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mm/pm: force GFP_NOIO during suspend/hibernation and resume

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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>
This commit is contained in:
Rafael J. Wysocki 2010-03-05 13:42:13 -08:00 • committed by Linus Torvalds
parent ad2bd7e0e9
commit 452aa6999e
5 changed files with 41 additions and 5 deletions
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7
include/linux/gfp.h
View file

@ -83,6 +83,7 @@ struct vm_area_struct;
#define GFP_HIGHUSER_MOVABLE (__GFP_WAIT | __GFP_IO | __GFP_FS | \
__GFP_HARDWALL | __GFP_HIGHMEM | \
__GFP_MOVABLE)
#define GFP_IOFS (__GFP_IO | __GFP_FS)
#ifdef CONFIG_NUMA
#define GFP_THISNODE (__GFP_THISNODE | __GFP_NOWARN | __GFP_NORETRY)
@ -337,9 +338,7 @@ void drain_local_pages(void *dummy);
extern gfp_t gfp_allowed_mask;
static inline void set_gfp_allowed_mask(gfp_t mask)
{
gfp_allowed_mask = mask;
}
extern void set_gfp_allowed_mask(gfp_t mask);
extern gfp_t clear_gfp_allowed_mask(gfp_t mask);
#endif /* __LINUX_GFP_H */