Messages in this thread Patch in this message | | | From | Naoya Horiguchi <> | Subject | [RFC][PATCH v1 10/11] mm: clear PageHWPoison in memory hotremove | Date | Fri, 9 Nov 2018 15:47:14 +0900 |
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One hopeful usecase of memory hotplug is to replace half-broken DIMMs with new ones, so it makes sense to clear hwpoison info at the time of memory hotremove.
I hope that this patch covers the topic discussed in https://lkml.org/lkml/2018/1/17/1228
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git v4.19-mmotm-2018-10-30-16-08/mm/page_alloc.c v4.19-mmotm-2018-10-30-16-08_patched/mm/page_alloc.c index 970d6ff..27826b3 100644 --- v4.19-mmotm-2018-10-30-16-08/mm/page_alloc.c +++ v4.19-mmotm-2018-10-30-16-08_patched/mm/page_alloc.c @@ -8139,8 +8139,9 @@ __offline_isolated_pages(unsigned long start_pfn, unsigned long end_pfn) * The HWPoisoned page may be not in buddy system, and * page_count() is not 0. */ - if (unlikely(!PageBuddy(page) && PageHWPoison(page))) { + if (unlikely(!PageBuddy(page) && TestClearPageHWPoison(page))) { pfn++; + num_poisoned_pages_dec(); SetPageReserved(page); continue; } -- 2.7.0
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