On Fri, 01 Nov 2013 18:31:40 +0400 Maxim Patlasov <MPatlasov@xxxxxxxxxxxxx> wrote: > "strictlimit" feature was introduced to enforce per-bdi dirty limits for > FUSE which sets bdi max_ratio to 1% by default: > > http://www.http.com//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 > max_ratio is decreased to some reasonable value. I suggest replacing "max_ratio" here with the much more informative "/sys/class/bdi/X:Y/max_ratio". Also, Documentation/ABI/testing/sysfs-class-bdi will need an update please. > 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? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>