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[157.157.92.225]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3e760776badsm3472160f8f.5.2025.09.11.11.30.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 11 Sep 2025 11:30:34 -0700 (PDT) Message-ID: <3791c8ff-fcf5-4312-b6dc-c7ff172f7f8d@linaro.org> Date: Thu, 11 Sep 2025 18:30:23 +0000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: The different ways QEMU logs stuff To: Paolo Bonzini , Markus Armbruster , qemu-devel@nongnu.org Cc: =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , Stefan Hajnoczi , Mads Ynddal , =?UTF-8?Q?Alex_Benn=C3=A9e?= , Peter Maydell , =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , Greg Kurz References: <87bjnhgpg8.fsf@pond.sub.org> <2ae622b3-4210-494e-95a3-cc20219779a7@redhat.com> From: Richard Henderson Content-Language: en-US In-Reply-To: <2ae622b3-4210-494e-95a3-cc20219779a7@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::334; envelope-from=richard.henderson@linaro.org; helo=mail-wm1-x334.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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 On 9/11/25 14:49, Paolo Bonzini wrote: >>    -d tid further splits per thread. >> >>    Splitting per thread feels fairly redundant once the prefix includes >>    the thread name.  Thread names is easier to make sense of than numeric >>    thread IDs in the split filenames. > > https://lore.kernel.org/all/20220417183019.755276-1-richard.henderson@linaro.org/ says > "this can be extremely helpful in debugging user-only threads". Compare strace -ff. r~