Re: [PATCH 09/14] block: only mark bio as tracked if it really is tracked
From: Christoph Hellwig <hch@infradead.org>
Date: 2021-10-18 09:19:48
On Sat, Oct 16, 2021 at 07:37:43PM -0600, Jens Axboe wrote:
We set BIO_TRACKED unconditionally when rq_qos_throttle() is called, even
though we may not even have an rq_qos handler. Only mark it as TRACKED if
it really is potentially tracked.
This saves considerable time for the case where the bio isn't tracked:
2.64% -1.65% [kernel.vmlinux] [k] bio_endio
Signed-off-by: Jens Axboe <axboe@kernel.dk>Looks good, Reviewed-by: Christoph Hellwig <hch@lst.de>