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author | Maxim Patlasov <MPatlasov@parallels.com> | 2014-11-27 11:56:02 +1100 |
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committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2014-12-01 20:38:29 +1100 |
commit | 984907efd4a7aa955ed1b4d664e82ef230649b51 (patch) | |
tree | 45117eb8c0413cbbcd2c9eb3871eb2b370092bfb /fs/libfs.c | |
parent | ae34c2d3c9c6dde8745b8a22a40f091a4feb4a64 (diff) |
mm: add strictlimit knob
The "strictlimit" feature was introduced to enforce per-bdi dirty limits
for FUSE which sets bdi max_ratio to 1% by default:
http://article.gmane.org/gmane.linux.kernel.mm/105809
However the feature can be useful for other relatively slow or untrusted
BDIs like USB flash drives and DVD+RW. The patch adds a knob to enable
the feature:
echo 1 > /sys/class/bdi/X:Y/strictlimit
Being enabled, the feature enforces bdi max_ratio limit even if global
(10%) dirty limit is not reached. Of course, the effect is not visible
until /sys/class/bdi/X:Y/max_ratio is decreased to some reasonable value.
Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: "Artem S. Tashkinov" <t.artem@lycos.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Jan Kara <jack@suse.cz>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/libfs.c')
0 files changed, 0 insertions, 0 deletions