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[81.97.203.96]) by smtp.gmail.com with ESMTPSA id f127-20020a1c3885000000b003b3307fb98fsm6245171wma.24.2022.12.15.05.44.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Dec 2022 05:44:46 -0800 (PST) Date: Thu, 15 Dec 2022 13:44:43 +0000 From: "Dr. David Alan Gilbert" To: Peter Maydell Cc: QEMU Developers , Juan Quintela Subject: Re: migration qtest failure: "query-migrate shows failed migration: Unable to write to socket: Broken pipe" Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.9 (2022-11-12) Received-SPF: pass client-ip=170.10.129.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org * Peter Maydell (peter.maydell@linaro.org) wrote: > On Thu, 15 Dec 2022 at 12:52, Dr. David Alan Gilbert > wrote: > > > > * Peter Maydell (peter.maydell@linaro.org) wrote: > > > It doesn't seem to repro running manually, my guess is that > > > it happens because the machine is heavily loaded doing the > > > whole build-and-test cycle. > > > > Yeh; I think we'll still need a backtrace or better qmp log though to > > figure it out. > > Unfortunately, often all you get is "what does 'make check' output". > Is there a way we can improve the test so it outputs something > more useful when it detects a failure ? I can't think how to improve the test itself like that; could you bind assertion failures to call/print a backtrace: https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/backtrace.3.html ? Dave > thanks > -- PMM > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK