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memory-hotplug: update mce_bad_pages when removing the memory

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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.

[[email protected]: cleanup ifdefs]
Signed-off-by: Wen Congyang <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Jiang Liu <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Yasuaki Ishimatsu <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Wen Congyang 2012-12-11 16:00:47 -08:00 • committed by Linus Torvalds
commit 95a4774d05
1 changed files with 22 additions and 0 deletions
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22
mm/sparse.c
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@ -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