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Wed, 05 Aug 2026 03:52:17 -0700 (PDT) Received: from google.com ([2a00:79e0:2031:6:8002:2a47:a704:5a58]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cbe708c0e7fsm1281577a12.21.2026.08.05.03.52.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Aug 2026 03:52:17 -0700 (PDT) Date: Wed, 5 Aug 2026 19:52:13 +0900 From: Sergey Senozhatsky To: Sergey Senozhatsky Cc: Andrew Morton , Minchan Kim , Jens Axboe , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, Longlong Xia , stable@vger.kernel.org Subject: Re: [PATCH] zram: freeze device queue before device reset Message-ID: References: <20260805021854.1057715-1-senozhatsky@chromium.org> Precedence: bulk X-Mailing-List: stable@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: On (26/08/05 19:29), Sergey Senozhatsky wrote: > On (26/08/05 11:18), Sergey Senozhatsky wrote: > > Device reset does not take into account in-flight async IO > > requests so we can free meta table and reset device concurrently > > with those requests being executed. The block layer guidelines > > indicate that queue state should be protected by blk_mq_freeze_queue() > > during teardown. Freeze zram queue before device reset. > > > > Fixes: cd67e10ac699 ("zram: promote zram from staging") > > Link: https://sashiko.dev/#/patchset/20260804065919.3970386-1-xialonglong2025@163.com > > Cc: stable@vger.kernel.org > > Signed-off-by: Sergey Senozhatsky > > lockdep doesn't seem to be happy... > Let me look into it. Actually I need to look at the report again. I suspect that we maybe don't even need any patches for that "async IO vs reset" sashiko report.