| commit | 6e2fa4dd683a22a7697e7ff51dad499406094d28 | [log] [tgz] |
|---|---|---|
| author | Hongnan Li <hongnan.li@linux.alibaba.com> | Wed Jul 01 16:09:38 2020 +0800 |
| committer | Jens Axboe <axboe@kernel.dk> | Wed Jul 01 08:02:38 2020 -0600 |
| tree | 2d90f66acae2e7111558a25e587b93cbae0dfd4e | |
| parent | 5a6c35f9af416114588298aa7a90b15bbed15a41 [diff] |
blk-iolatency: only call ktime_get() if needed ktime_to_ns(ktime_get()), which is expensive, does not need to be called if blk_iolatency_enabled() return false in blkcg_iolatency_done_bio(). Postponing ktime_to_ns(ktime_get()) execution reduces the CPU usage when blk_iolatency is disabled. Signed-off-by: Hongnan Li <hongnan.li@linux.alibaba.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>