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| author | Maxim Patlasov <MPatlasov@parallels.com> | 2014-07-30 16:08:21 -0700 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-08-19 14:23:35 +0200 |
| commit | c5fec566bef6a027e75c84c35ec970482eb88cea (patch) | |
| tree | 86da44bde252b706668cddf44d0fae8087ab4fdd /mm/huge_memory.c | |
| parent | ca519c15876ef6cdb6ccede7fc6832868ee09494 (diff) | |
mm/page-writeback.c: fix divide by zero in bdi_dirty_limits()
commit f6789593d5cea42a4ecb1cbeab6a23ade5ebbba7 upstream.
Under memory pressure, it is possible for dirty_thresh, calculated by
global_dirty_limits() in balance_dirty_pages(), to equal zero. Then, if
strictlimit is true, bdi_dirty_limits() tries to resolve the proportion:
bdi_bg_thresh : bdi_thresh = background_thresh : dirty_thresh
by dividing by zero.
Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'mm/huge_memory.c')
0 files changed, 0 insertions, 0 deletions