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ublk: don't dereference ublk_queue in ublk_check_and_get_req()
authorCaleb Sander Mateos <csander@purestorage.com>
Thu, 18 Sep 2025 01:49:42 +0000 (19:49 -0600)
committerJens Axboe <axboe@kernel.dk>
Sat, 20 Sep 2025 12:36:27 +0000 (06:36 -0600)
commitb40dcdf8235d536072b9f61eb6d291f0f3720768
treeeafb91176b2f1818a4363d0addc8a1292ee90fb6tree | snapshot
parent5125535f90564117506d926d0de92c4c2622b720commit | diff
ublk: don't dereference ublk_queue in ublk_check_and_get_req()

For ublk servers with many ublk queues, accessing the ublk_queue in
ublk_ch_{read,write}_iter() is a frequent cache miss. Get the flags and
queue depth from the ublk_device instead, which is accessed just before.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/block/ublk_drv.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git