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Sat, 05 Nov 2022 12:31:32 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id l14-20020a4ac60e000000b00499499a8e18sm834040ooq.5.2022.11.05.12.31.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Nov 2022 12:31:31 -0700 (PDT) Date: Sat, 5 Nov 2022 12:31:29 -0700 From: Guenter Roeck To: Steven Rostedt Message-ID: <20221105193129.GA1487775@roeck-us.net> References: <20221105060024.598488967@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221105060024.598488967@goodmis.org> Subject: Re: [Intel-gfx] [PATCH v4a 00/38] timers: Use timer_shutdown*() before freeing timers X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alsa-devel@alsa-project.org, linux-staging@lists.linux.dev, linux-doc@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Thomas Gleixner , linux-leds@vger.kernel.org, drbd-dev@lists.linbit.com, linux-s390@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, linux-sh@vger.kernel.org, linux-atm-general@lists.sourceforge.net, linux-afs@lists.infradead.org, lvs-devel@vger.kernel.org, linux-acpi@vger.kernel.org, coreteam@netfilter.org, intel-wired-lan@lists.osuosl.org, linux-input@vger.kernel.org, tipc-discussion@lists.sourceforge.net, linux-ext4@vger.kernel.org, linux-media@vger.kernel.org, bridge@lists.linux-foundation.org, linux-pm@vger.kernel.org, intel-gfx@lists.freedesktop.org, rcu@vger.kernel.org, cgroups@vger.kernel.org, openipmi-developer@lists.sourceforge.net, Anna-Maria Gleixner , linux-edac@vger.kernel.org, linux-block@vger.kernel.org, linux-nfs@vger.kernel.org, linux-parisc@vger.kernel.org, Stephen Boyd , netdev@vger.kernel.org, linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, netfilter-devel@vger.kernel.org, Andrew Morton , Linus Torvalds Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Sat, Nov 05, 2022 at 02:00:24AM -0400, Steven Rostedt wrote: > > Back in April, I posted an RFC patch set to help mitigate a common issue > where a timer gets armed just before it is freed, and when the timer > goes off, it crashes in the timer code without any evidence of who the > culprit was. I got side tracked and never finished up on that patch set. > Since this type of crash is still our #1 crash we are seeing in the field, > it has become a priority again to finish it. > > The last version of that patch set is here: > > https://lore.kernel.org/all/20221104054053.431922658@goodmis.org/ > > I'm calling this version 4a as it only has obvious changes were the timer that > is being shutdown is in the same function where it will be freed or released, > as this series should be "safe" for adding. I'll be calling the other patches > 4b for the next merge window. > For the series, as far as my testbed goes: Build results: total: 152 pass: 152 fail: 0 Qemu test results: total: 500 pass: 500 fail: 0 No runtime crashes or warnings observed. Tested-by: Guenter Roeck Guenter