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ublk: don't access ublk_queue in ublk_register_io_buf() 

For ublk servers with many ublk queues, accessing the ublk_queue in
ublk_register_io_buf() is a frequent cache miss. Get the flags from the
ublk_device instead, which is accessed earlier in
ublk_ch_uring_cmd_local().

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>
This commit is contained in:
Caleb Sander Mateos 2025-09-17 19:49:44 -06:00 committed by Jens Axboe
parent 8a81926e45
commit 692cf47e1a
1 changed files with 1 additions and 1 deletions
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2
drivers/block/ublk_drv.c
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@ -2133,7 +2133,7 @@ static int ublk_register_io_buf(struct io_uring_cmd *cmd,
struct request *req; struct request *req;
int ret; int ret;
if (!ublk_support_zero_copy(ubq)) if (!ublk_dev_support_zero_copy(ub))
return -EINVAL; return -EINVAL;
req = __ublk_check_and_get_req(ub, ubq, io, 0); req = __ublk_check_and_get_req(ub, ubq, io, 0);