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| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2015-09-22 14:59:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-22 15:09:53 -0700 |
| commit | 3aaa76e125c1dd58c9b599baa8c6021896874c12 (patch) | |
| tree | d733e970440cbe96dc3fe78cbaf56b1581eb036b /mm | |
| parent | 8a04446ab0cf4f35d9f583cd6adcbf7c534e4995 (diff) | |
| download | linux-3aaa76e125c1dd58c9b599baa8c6021896874c12.tar.bz2 | |
mm: migrate: hugetlb: putback destination hugepage to active list
Since commit bcc54222309c ("mm: hugetlb: introduce page_huge_active")
each hugetlb page maintains its active flag to avoid a race condition
betwe= en multiple calls of isolate_huge_page(), but current kernel
doesn't set the f= lag on a hugepage allocated by migration because the
proper putback routine isn= 't called. This means that users could
still encounter the race referred to by bcc54222309c in this special
case, so this patch fixes it.
Fixes: bcc54222309c ("mm: hugetlb: introduce page_huge_active")
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org> [4.1.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/migrate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index c3cb566af3e2..7452a00bbb50 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1075,7 +1075,7 @@ out: if (rc != MIGRATEPAGE_SUCCESS && put_new_page) put_new_page(new_hpage, private); else - put_page(new_hpage); + putback_active_hugepage(new_hpage); if (result) { if (rc) |