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| author | Wanpeng Li <wanpeng.li@hotmail.com> | 2015-09-08 15:03:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 15:35:28 -0700 |
| commit | 7d1900c744b2e4687b3e467edf58373c02bcf22d (patch) | |
| tree | 172e71a73d3b159dc2da1ca1fe344b59a3f5ce2f /mm/memory-failure.c | |
| parent | 5dd2c4bded8776ee93c8f38b739fea531095067f (diff) | |
| download | lwn-7d1900c744b2e4687b3e467edf58373c02bcf22d.tar.gz lwn-7d1900c744b2e4687b3e467edf58373c02bcf22d.zip | |
mm/hwpoison: fix failure to split thp w/ refcount held
THP pages will get a refcount in madvise_hwpoison() w/
MF_COUNT_INCREASED flag, however, the refcount is still held when fail
to split THP pages.
Fix it by reducing the refcount of THP pages when fail to split THP.
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 016c814101ed..8ad923a93539 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1725,6 +1725,8 @@ int soft_offline_page(struct page *page, int flags) if (PageAnon(hpage) && unlikely(split_huge_page(hpage))) { pr_info("soft offline: %#lx: failed to split THP\n", pfn); + if (flags & MF_COUNT_INCREASED) + put_page(page); return -EBUSY; } } |