summaryrefslogtreecommitdiffstats
path: root/mm/page-writeback.c
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2015-08-18 14:55:36 -0700
committerJens Axboe <axboe@fb.com>2015-08-18 15:49:36 -0700
commit69d7fde5909b614114343974cfc52cb8ff30b544 (patch)
tree231d68d331b286767109c616823781ed030ecb2b /mm/page-writeback.c
parent3ecca62931ee6a30822a1ab7299bc8b8a21e5288 (diff)
downloadop-kernel-dev-69d7fde5909b614114343974cfc52cb8ff30b544.zip
op-kernel-dev-69d7fde5909b614114343974cfc52cb8ff30b544.tar.gz
blkcg: use CGROUP_WEIGHT_* scale for io.weight on the unified hierarchy
cgroup is trying to make interface consistent across different controllers. For weight based resource control, the knob should have the range [1, 10000] and default to 100. This patch updates cfq-iosched so that the weight range conforms. The internal calculations have enough range and the widening of the weight range shouldn't cause any problem. * blkcg_policy->cpd_bind_fn() is added. If present, this is invoked when blkcg is attached to a hierarchy. * cfq_cpd_init() is updated to use the new default value on the unified hierarchy. * cfq_cpd_bind() callback is implemented to clear per-blkg configs and apply the default config matching the hierarchy type. * cfqd->root_group->[leaf_]weight initialization in cfq_init_queue() is moved into !CONFIG_CFQ_GROUP_IOSCHED block. cfq_cpd_bind() is now responsible for initializing the initial weights when blkcg is enabled. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Arianna Avanzini <avanzini.arianna@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'mm/page-writeback.c')
0 files changed, 0 insertions, 0 deletions
OpenPOWER on IntegriCloud