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Fri, 31 Jul 2026 09:25:11 -0700 (PDT) Date: Fri, 31 Jul 2026 11:24:57 -0500 From: Ming Lei To: Yang Xiuwei Cc: Jens Axboe , Shuah Khan , linux-block@vger.kernel.org, linux-kselftest@vger.kernel.org, Caleb Sander Mateos Subject: Re: [PATCH] selftests: ublk: add rotating auto_buf index regression test Message-ID: References: <20260730010910.799346-3-yangxiuwei@kylinos.cn> <20260730024050.1062354-1-yangxiuwei@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260730024050.1062354-1-yangxiuwei@kylinos.cn> On Thu, Jul 30, 2026 at 10:40:50AM +0800, Yang Xiuwei wrote: > Batch AUTO_BUF_REG COMMIT must unregister the old auto_buf index before > storing the next one. Fixed per-tag indexing (A == B) masks bugs that > clear after overwriting io->buf. > > Add kublk --rotate_auto_buf so each tag alternates between two sparse > buffer indices, and test_batch_04.sh to exercise that path. Without the > driver fix, the request ref stays stuck and I/O hangs; the test uses a > short timeout and kills the ublk daemon to recover. With the fix, a > small write completes quickly. > > Signed-off-by: Yang Xiuwei Looks fine, Reviewed-by: Ming Lei BTW, this selftest patch should have been part of "[PATCH v2 0/2] ublk: fix auto buf reg ordering around uring_cmd" Thanks, Ming