This is a note to let you know that I've just added the patch titled
ublk: remove check IO_URING_F_SQE128 in ublk_ch_uring_cmd
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ublk-remove-check-io_uring_f_sqe128-in-ublk_ch_uring_cmd.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9c7c4bc986932218fd0df9d2a100509772028fb1 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@xxxxxxxxxx>
Date: Mon, 20 Feb 2023 12:14:13 +0800
Subject: ublk: remove check IO_URING_F_SQE128 in ublk_ch_uring_cmd
From: Ming Lei <ming.lei@xxxxxxxxxx>
commit 9c7c4bc986932218fd0df9d2a100509772028fb1 upstream.
sizeof(struct ublksrv_io_cmd) is 16bytes, which can be held in 64byte SQE,
so not necessary to check IO_URING_F_SQE128.
With this change, we get chance to save half SQ ring memory.
Fixed: 71f28f3136af ("ublk_drv: add io_uring based userspace block driver")
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230220041413.1524335-1-ming.lei@xxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/block/ublk_drv.c | 3 ---
1 file changed, 3 deletions(-)
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -1223,9 +1223,6 @@ static int __ublk_ch_uring_cmd(struct io
__func__, cmd->cmd_op, ub_cmd->q_id, tag,
ub_cmd->result);
- if (!(issue_flags & IO_URING_F_SQE128))
- goto out;
-
if (ub_cmd->q_id >= ub->dev_info.nr_hw_queues)
goto out;
Patches currently in stable-queue which might be from ming.lei@xxxxxxxxxx are
queue-6.1/ublk-remove-check-io_uring_f_sqe128-in-ublk_ch_uring_cmd.patch
