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author | Maxim Patlasov <MPatlasov@parallels.com> | 2014-10-03 09:31:30 +1000 |
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committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2014-10-13 14:58:18 +1100 |
commit | a9d5ebcae40106535e34d377a347e224d8d0d50a (patch) | |
tree | 7c0229c0f66897e64e03297c7cbf5702e5aaefff /fs/ocfs2/namei.h | |
parent | d3e82755a8e9939dec097e0b04d71294d73263de (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/ocfs2/namei.h')
0 files changed, 0 insertions, 0 deletions