Pavel Begunkov 8148f0b564 blk-stat: Optimise blk_stat_add() ...

blk_stat_add() calls {get,put}_cpu_ptr() in a loop, which entails
overhead of disabling/enabling preemption. The loop is under RCU
(i.e.short) anyway, so do get_cpu() in advance.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2019-10-07 21:19:10 -06:00

4.6 KiB

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