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| author | Wen Congyang <wency@cn.fujitsu.com> | 2012-12-11 16:00:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-11 17:22:22 -0800 |
| commit | 95a4774d055c72d96ab192a1c6675cbf4d513f71 (patch) | |
| tree | 9988a8d58d2c61db0f98d98e0b4b83d74ce63d61 /mm/sparse.c | |
| parent | b023f46813cde6e3b8a8c24f432ff9c1fd8e9a64 (diff) | |
| download | linux-95a4774d055c72d96ab192a1c6675cbf4d513f71.tar.bz2 | |
memory-hotplug: update mce_bad_pages when removing the memory
When we hotremove a memory device, we will free the memory to store struct
page. If the page is hwpoisoned page, we should decrease mce_bad_pages.
[akpm@linux-foundation.org: cleanup ifdefs]
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index a83de2f72b30..c7be01906998 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -771,6 +771,27 @@ out: return ret; } +#ifdef CONFIG_MEMORY_FAILURE +static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages) +{ + int i; + + if (!memmap) + return; + + for (i = 0; i < PAGES_PER_SECTION; i++) { + if (PageHWPoison(&memmap[i])) { + atomic_long_sub(1, &mce_bad_pages); + ClearPageHWPoison(&memmap[i]); + } + } +} +#else +static inline void clear_hwpoisoned_pages(struct page *memmap, int nr_pages) +{ +} +#endif + void sparse_remove_one_section(struct zone *zone, struct mem_section *ms) { struct page *memmap = NULL; @@ -784,6 +805,7 @@ void sparse_remove_one_section(struct zone *zone, struct mem_section *ms) ms->pageblock_flags = NULL; } + clear_hwpoisoned_pages(memmap, PAGES_PER_SECTION); free_section_usemap(memmap, usemap); } #endif |