• Tejun Heo's avatar
    bfq-iosched: stop using blkg->stat_bytes and ->stat_ios · fd41e603
    Tejun Heo authored
    When used on cgroup1, bfq uses the blkg->stat_bytes and ->stat_ios
    from blk-cgroup core to populate six stat knobs.  blk-cgroup core is
    moving away from blkg_rwstat to improve scalability and won't be able
    to support this usage.
    
    It isn't like the sharing gains all that much.  Let's break it out to
    dedicated rwstat counters which are updated when on cgroup1.  This
    makes use of bfqg_*rwstat*() helpers outside of
    CONFIG_BFQ_CGROUP_DEBUG.  Move them out.
    
    v2: Compile fix when !CONFIG_BFQ_CGROUP_DEBUG.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Cc: Paolo Valente <paolo.valente@linaro.org>
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
    fd41e603
bfq-iosched.h 36.4 KB