diff options
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 716aebcbb0de..79a32be5e7df 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1686,7 +1686,6 @@ int memory_failure(unsigned long pfn, int flags) { struct page *p; struct page *hpage; - struct page *orig_head; struct dev_pagemap *pgmap; int res = 0; unsigned long page_flags; @@ -1732,7 +1731,7 @@ try_again: goto unlock_mutex; } - orig_head = hpage = compound_head(p); + hpage = compound_head(p); num_poisoned_pages_inc(); /* @@ -1813,10 +1812,21 @@ try_again: lock_page(p); /* - * The page could have changed compound pages during the locking. - * If this happens just bail out. + * We're only intended to deal with the non-Compound page here. + * However, the page could have changed compound pages due to + * race window. If this happens, we could try again to hopefully + * handle the page next round. */ - if (PageCompound(p) && compound_head(p) != orig_head) { + if (PageCompound(p)) { + if (retry) { + if (TestClearPageHWPoison(p)) + num_poisoned_pages_dec(); + unlock_page(p); + put_page(p); + flags &= ~MF_COUNT_INCREASED; + retry = false; + goto try_again; + } action_result(pfn, MF_MSG_DIFFERENT_COMPOUND, MF_IGNORED); res = -EBUSY; goto unlock_page; |