Messages in this thread Patch in this message | | | From | wency@cn ... | Subject | [PATCH v3 6/9] memory-hotplug: update mce_bad_pages when removing the memory | Date | Fri, 19 Oct 2012 14:46:39 +0800 |
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From: Wen Congyang <wency@cn.fujitsu.com>
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.
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: Andrew Morton <akpm@linux-foundation.org> CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> CC: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> --- mm/sparse.c | 19 +++++++++++++++++++ 1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/mm/sparse.c b/mm/sparse.c index 0021265..77d6a93 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -774,6 +774,24 @@ out: return ret; } +#ifdef CONFIG_MEMORY_FAILURE +static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages) +{ + int i; + + for (i = 0; i < PAGES_PER_SECTION; i++) { + if (PageHWPoison(&memmap[i])) { + atomic_long_sub(1, &mce_bad_pages); + ClearPageHWPoison(&memmap[i]); + } + } +} +#else +static 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; @@ -785,6 +803,7 @@ void sparse_remove_one_section(struct zone *zone, struct mem_section *ms) __section_nr(ms)); ms->section_mem_map = 0; ms->pageblock_flags = NULL; + clear_hwpoisoned_pages(memmap, PAGES_PER_SECTION); } free_section_usemap(memmap, usemap); -- 1.7.1
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