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AW1haW4tMjYwODExMDA4NiBTYWx0ZWRfX3Uw7rB0mDvOB yq8+Q3G/pnEm4wN3FENRnxOOu3/zdrXKvElRpzUkxD0AtboFXrDD57NiBr/keYFHT/P3rk9025C tLgf0fXa6zfMZ/WTHwwt1bJHmAXM/D/4oW1WmuB40x93HViToTvP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260811_032659_907974_A76ABC02 X-CRM114-Status: GOOD ( 13.18 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 10/08/2026 18:25, Nilay Shroff wrote: >> >> iops: (groupid=0, jobs=10): err= 0: pid=821: Mon Aug 10 08:08:28 2026 >> read: IOPS=9239, BW=36.1MiB/s (37.8MB/s)(1434MiB/39744msec) >> slat (usec): min=25, max=110836, avg=129.22, stdev=537.18 >> >> Note that I do have many heavy kernel debug options enabled, like kasan and kmemleak, which may influence this. >> > > Thanks for testing. Given that you're running with KASAN, kmemleak, and other > heavy debug options enabled, I think this is expected. Those configurations > can significantly increase I/O completion latency, causing some samples to > exceed the 1-second threshold. The warning is also rate-limited to avoid > flooding the log. That said, still if it's causing a lot of noise in the logs > then we could change it to dev_dbg_ratelimited() from dev_warn_ratelimited(). Note they these warnings go away when I turn off those debug options, as expected. The max latency I was seeing was ~1.2 seconds. Maybe you can just increase this limit for ignoring the sample. Or make it a dev_warn_once(). Or control the warn print rate with DEFINE_RATELIMIT_STATE.