diff options
| author | Caleb Sander Mateos <csander@purestorage.com> | 2025-09-17 19:49:45 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-09-20 06:36:27 -0600 |
| commit | ce88e3ef33d35c740d26342be5d8f65972fd5597 (patch) | |
| tree | 29d796b720241a6b7f902ef84e21f6feffac62ef | |
| parent | 692cf47e1af39f86f28069db5ca6b00a7d2daddc (diff) | |
ublk: don't access ublk_queue in ublk_daemon_register_io_buf()
For ublk servers with many ublk queues, accessing the ublk_queue in
ublk_daemon_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>
| -rw-r--r-- | drivers/block/ublk_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index 751ec62655f8..266b46d40886 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -2169,7 +2169,7 @@ ublk_daemon_register_io_buf(struct io_uring_cmd *cmd, return ublk_register_io_buf(cmd, ub, ubq, io, index, issue_flags); - if (!ublk_support_zero_copy(ubq) || !ublk_rq_has_data(req)) + if (!ublk_dev_support_zero_copy(ub) || !ublk_rq_has_data(req)) return -EINVAL; ret = io_buffer_register_bvec(cmd, req, ublk_io_release, index, |