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[188.155.177.222]) by smtp.gmail.com with ESMTPSA id n13sm8598198ejk.97.2021.06.29.11.28.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Jun 2021 11:28:02 -0700 (PDT) Subject: Re: [BUG] btrfs potential failure on 32 core LTP test (fallocate05) From: Krzysztof Kozlowski To: Josef Bacik , Chris Mason , David Sterba , linux-btrfs@vger.kernel.org, Linux Kernel Mailing List , "kernel-team@lists.ubuntu.com" , "ltp@lists.linux.it" , Qu Wenruo , Filipe Manana References: <124d7ead-6600-f369-7af1-a1bc27df135c@toxicpanda.com> <667133e5-44cb-8d95-c40a-12ac82f186f0@canonical.com> <0b6a502a-8db8-ef27-f48e-5001f351ef24@toxicpanda.com> <2576a472-1c99-889a-685c-a12bbfb08052@canonical.com> Message-ID: <9e2214b1-999d-90cf-a5c2-2dbb5a2eadd4@canonical.com> Date: Tue, 29 Jun 2021 20:28:02 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <2576a472-1c99-889a-685c-a12bbfb08052@canonical.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 29/06/2021 20:06, Krzysztof Kozlowski wrote: > Minor update - it's not only Azure's. AWS m5.8xlarge and m5.16xlarge (32 > and 64 cores) fail similarly. I'll try later also QEMU machines with > different amount of CPUs. > Test on QEMU machine with 31 CPUs passes. With 32 CPUs - failure as reported. dmesg is empty - no error around this. Maybe something with per-cpu variables? Best regards, Krzysztof