[lkml]   [2013]   [Nov]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] mm: add strictlimit knob
On Fri, 01 Nov 2013 18:31:40 +0400 Maxim Patlasov <> wrote:

> "strictlimit" feature was introduced to enforce per-bdi dirty limits for
> FUSE which sets bdi max_ratio to 1% by default:
> 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
> max_ratio is decreased to some reasonable value.

I suggest replacing "max_ratio" here with the much more informative

Also, Documentation/ABI/testing/sysfs-class-bdi will need an update

> mm/backing-dev.c | 35 +++++++++++++++++++++++++++++++++++
> 1 file changed, 35 insertions(+)

I'm not really sure what to make of the patch. I assume you tested it
and observed some effect. Could you please describe the test setup and
the effects in some detail?

 \ /
  Last update: 2013-11-04 23:21    [W:0.097 / U:1.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site