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author | Maxim Patlasov <MPatlasov@parallels.com> | 2014-07-31 09:38:12 +1000 |
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committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2014-08-07 17:03:50 +1000 |
commit | af86fefe413b6b1542e1b0f97be8bc9570c5eaf7 (patch) | |
tree | 69e0e7ca7581794d29eaf9bb683214a692be391b /arch/s390/kernel/vdso.c | |
parent | 1e9fa2a9ad2ea9995dd533a17934ee2f3813712e (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 'arch/s390/kernel/vdso.c')
0 files changed, 0 insertions, 0 deletions