On 05/29/2018 02:17 PM, Josef Bacik wrote: > From: Josef Bacik <jbacik@xxxxxx> > > Signed-off-by: Josef Bacik <jbacik@xxxxxx> > --- > block/Kconfig | 12 + > block/Makefile | 1 + > block/blk-iolatency.c | 844 ++++++++++++++++++++++++++++++++++++++++++++++ > block/blk-sysfs.c | 2 + > block/blk.h | 6 + > include/linux/blk_types.h | 2 - > 6 files changed, 865 insertions(+), 2 deletions(-) > create mode 100644 block/blk-iolatency.c > > diff --git a/block/Kconfig b/block/Kconfig > index 28ec55752b68..a4e800f57688 100644 > --- a/block/Kconfig > +++ b/block/Kconfig > @@ -149,6 +149,18 @@ config BLK_WBT > dynamically on an algorithm loosely based on CoDel, factoring in > the realtime performance of the disk. > > +config BLK_CGROUP_IOLATENCY > + bool "Enable support for latency based cgroup io protection" IO protection" There are currently no occurrences of "io" (standalone) in block/Kconfig and it would be a bad precedent to add one, so please use that shift key. :) > + depends on BLK_CGROUP=y > + default n > + ---help--- > + Enabling this option enables the .latency interface for io throttling. > + The io controller will attempt to maintain average io latencies below > + the configured latency target, throttling anybody with a higher latency > + target than the victimized group. > + > + Note, this is an experimental interface and could be changed someday. > + > config BLK_WBT_SQ > bool "Single queue writeback throttling" > default n -- ~Randy
