• Tejun Heo's avatar
    blk-iocost: fix incorrect vtime comparison in iocg_is_idle() · dcd6589b
    Tejun Heo authored
    vtimes may wrap and time_before/after64() should be used to determine
    whether a given vtime is before or after another. iocg_is_idle() was
    incorrectly using plain "<" comparison do determine whether done_vtime
    is before vtime. Here, the only thing we're interested in is whether
    done_vtime matches vtime which indicates that there's nothing in
    flight. Let's test for inequality instead.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Fixes: 7caa4715 ("blkcg: implement blk-iocost")
    Cc: stable@vger.kernel.org # v5.4+
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
    dcd6589b
blk-iocost.c 67.1 KB