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thp: khugepaged_prealloc_page() forgot to reset the page alloc indicator 

If NUMA is enabled, the indicator is not reset if the previous page
request failed, ausing us to trigger the BUG_ON() in
khugepaged_alloc_page().

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Xiao Guangrong 2012-10-08 16:32:57 -07:00 committed by Linus Torvalds
parent 74c08f9826
commit e3b4126c55
1 changed files with 1 additions and 0 deletions
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mm/huge_memory.c
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@ -1797,6 +1797,7 @@ static bool khugepaged_prealloc_page(struct page **hpage, bool *wait)
return false;
*wait = false;
*hpage = NULL;
khugepaged_alloc_sleep();
} else if (*hpage) {
put_page(*hpage);