diff options
| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2010-12-02 14:31:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-12-02 14:51:15 -0800 |
| commit | 20d6c96b5f1cad5c5da4641945ec17a1d9a1afc8 (patch) | |
| tree | 38168dc87d58fd924adb3aaca540cd23ad1246bf /mm/memory-failure.c | |
| parent | 4fe65cab844e6d3d7d310e66a501d5e7242ecb54 (diff) | |
| download | lwn-20d6c96b5f1cad5c5da4641945ec17a1d9a1afc8.tar.gz lwn-20d6c96b5f1cad5c5da4641945ec17a1d9a1afc8.zip | |
mem-hotplug: introduce {un}lock_memory_hotplug()
Presently hwpoison is using lock_system_sleep() to prevent a race with
memory hotplug. However lock_system_sleep() is a no-op if
CONFIG_HIBERNATION=n. Therefore we need a new lock.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Suggested-by: Hugh Dickins <hughd@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 124324134ff6..46ab2c044b0e 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -51,6 +51,7 @@ #include <linux/slab.h> #include <linux/swapops.h> #include <linux/hugetlb.h> +#include <linux/memory_hotplug.h> #include "internal.h" int sysctl_memory_failure_early_kill __read_mostly = 0; @@ -1230,11 +1231,10 @@ static int get_any_page(struct page *p, unsigned long pfn, int flags) return 1; /* - * The lock_system_sleep prevents a race with memory hotplug, - * because the isolation assumes there's only a single user. + * The lock_memory_hotplug prevents a race with memory hotplug. * This is a big hammer, a better would be nicer. */ - lock_system_sleep(); + lock_memory_hotplug(); /* * Isolate the page, so that it doesn't get reallocated if it @@ -1264,7 +1264,7 @@ static int get_any_page(struct page *p, unsigned long pfn, int flags) ret = 1; } unset_migratetype_isolate(p); - unlock_system_sleep(); + unlock_memory_hotplug(); return ret; } |