From 5125535f90564117506d926d0de92c4c2622b720 Mon Sep 17 00:00:00 2001 From: Caleb Sander Mateos Date: Wed, 17 Sep 2025 19:49:41 -0600 Subject: [PATCH] ublk: don't dereference ublk_queue in ublk_ch_uring_cmd_local() For ublk servers with many ublk queues, accessing the ublk_queue to handle a ublk command is a frequent cache miss. Get the queue depth from the ublk_device instead, which is accessed just before. Signed-off-by: Caleb Sander Mateos Reviewed-by: Ming Lei Signed-off-by: Jens Axboe --- drivers/block/ublk_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index 04b8613ce623f..58f688eac7420 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -2333,7 +2333,7 @@ static int ublk_ch_uring_cmd_local(struct io_uring_cmd *cmd, ubq = ublk_get_queue(ub, q_id); - if (tag >= ubq->q_depth) + if (tag >= ub->dev_info.queue_depth) goto out; io = &ubq->ios[tag]; -- 2.47.3