On 8/6/22 08:20, Jens Axboe wrote: > bdev based polled O_DIRECT is currently quite a bit faster than > passthru on the same device, and one of the reaons is that we're not > able to use the bio caching for passthru IO. > > If REQ_POLLED is set on the request, use the fs bio set for grabbing a > bio from the caches, if available. This saves 5-6% of CPU over head > for polled passthru IO. > > Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Looks good. Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx> -ck
