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[2003:ea:8bd4:d600:b172:33d8:124c:91c0]) by smtp.googlemail.com with ESMTPSA id f17-v6sm17899439wrs.1.2018.08.15.23.13.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 15 Aug 2018 23:13:10 -0700 (PDT) To: Anna-Maria Gleixner , Thomas Gleixner Cc: Linux Kernel Mailing List From: Heiner Kallweit Subject: Fix 80d20d35af1e ("nohz: Fix local_timer_softirq_pending()") may have revealed another problem Message-ID: <8b93f213-fe67-f132-f3f5-5b17995ec63d@gmail.com> Date: Thu, 16 Aug 2018 08:13:03 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Recently I started to get warning "NOHZ: local_softirq_pending 202" and I think it's related to mentioned commit (didn't bisect it yet). See log from suspending. I have no reason to think the fix is wrong, it may just have revealed another issue which existed before and was hidden by the bug. Rgds, Heiner [ 75.073353] random: crng init done [ 75.073402] random: 7 urandom warning(s) missed due to ratelimiting [ 78.619564] PM: suspend entry (deep) [ 78.619675] PM: Syncing filesystems ... done. [ 78.653684] Freezing user space processes ... (elapsed 0.002 seconds) done. [ 78.656094] OOM killer disabled. [ 78.656113] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. [ 78.658177] Suspending console(s) (use no_console_suspend to debug) [ 78.663066] nuvoton-cir 00:07: disabled [ 78.671817] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 78.672210] sd 0:0:0:0: [sda] Stopping disk [ 78.786651] ACPI: Preparing to enter system sleep state S3 [ 78.789613] PM: Saving platform NVS memory [ 78.789759] Disabling non-boot CPUs ... [ 78.805154] NOHZ: local_softirq_pending 202 [ 78.805182] NOHZ: local_softirq_pending 202 [ 78.807102] smpboot: CPU 1 is now offline