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Thu, 2 Jul 2020 07:12:37 +0000 (UTC) IronPort-SDR: 56aD+UlxqoCBy5kJM8L2/FlSo6Of+o/trdYTTo1HFq9ka8SOFZx15pYc/U0DgQgCQ39+UIIh6J U5pp1ah8my/A== X-IronPort-AV: E=McAfee;i="6000,8403,9669"; a="148361172" X-IronPort-AV: E=Sophos;i="5.75,303,1589266800"; d="scan'208";a="148361172" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jul 2020 00:12:35 -0700 IronPort-SDR: lMqQeMColxw2J+sR5/Vq/+4pg3pKriqOV1EUYi3Y7o2PRberNtjtn1GmThc1HQgdX/WFIBspyY fLti3MPRtdOQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,303,1589266800"; d="scan'208";a="314036934" Received: from shbuild999.sh.intel.com (HELO localhost) ([10.239.146.107]) by fmsmga002.fm.intel.com with ESMTP; 02 Jul 2020 00:12:31 -0700 Date: Thu, 2 Jul 2020 15:12:30 +0800 From: Feng Tang To: kernel test robot Cc: Andrew Morton , Michal Hocko , Johannes Weiner , Matthew Wilcox , Mel Gorman , Kees Cook , Luis Chamberlain , Iurii Zaikin , andi.kleen@intel.com, tim.c.chen@intel.com, dave.hansen@intel.com, ying.huang@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, lkp@lists.01.org Subject: Re: [mm] 4e2c82a409: ltp.overcommit_memory01.fail Message-ID: <20200702071230.GA17007@shbuild999.sh.intel.com> References: <1592725000-73486-4-git-send-email-feng.tang@intel.com> <20200702063201.GG3874@shao2-debian> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200702063201.GG3874@shao2-debian> User-Agent: Mutt/1.5.24 (2015-08-30) X-Rspamd-Queue-Id: 7AABE180B3CBA X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi, On Thu, Jul 02, 2020 at 02:32:01PM +0800, kernel test robot wrote: > Greeting, > > FYI, we noticed the following commit (built with gcc-9): > > commit: 4e2c82a40911c19419349918e675aa202b113b4d ("[PATCH v5 3/3] mm: adjust vm_committed_as_batch according to vm overcommit policy") > url: https://github.com/0day-ci/linux/commits/Feng-Tang/make-vm_committed_as_batch-aware-of-vm-overcommit-policy/20200621-153906 > > > in testcase: ltp > with following parameters: > > disk: 1HDD > test: mm-01 > > test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features. > test-url: http://linux-test-project.github.io/ > > > on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G > > caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): > > > > > If you fix the issue, kindly add following tag > Reported-by: kernel test robot > > > > <<>> > tag=overcommit_memory01 stime=1593425044 > cmdline="overcommit_memory" > contacts="" > analysis=exit > <<>> > tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s > overcommit_memory.c:116: INFO: MemTotal is 16394252 kB > overcommit_memory.c:118: INFO: SwapTotal is 268435452 kB > overcommit_memory.c:122: INFO: CommitLimit is 276632576 kB > mem.c:817: INFO: set overcommit_ratio to 50 > mem.c:817: INFO: set overcommit_memory to 2 > overcommit_memory.c:187: INFO: malloc 551061440 kB failed > overcommit_memory.c:208: PASS: alloc failed as expected > overcommit_memory.c:183: INFO: malloc 276632576 kB successfully > overcommit_memory.c:210: FAIL: alloc passed, expected to fail Thanks for the report! I took a rough look, and it all happens after changing the overcommit policy from a looser one to OVERCOMMIT_NEVER. I suspect it is due to the same cause as the previous warning message reported by Qian Cai https://lore.kernel.org/lkml/20200526181459.GD991@lca.pw/ Will further check it. Thanks, Feng > overcommit_memory.c:183: INFO: malloc 137765294 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > mem.c:817: INFO: set overcommit_memory to 0 > overcommit_memory.c:183: INFO: malloc 140770308 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > overcommit_memory.c:187: INFO: malloc 569659408 kB failed > overcommit_memory.c:208: PASS: alloc failed as expected > mem.c:817: INFO: set overcommit_memory to 1 > overcommit_memory.c:183: INFO: malloc 142414852 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > overcommit_memory.c:183: INFO: malloc 284829704 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > overcommit_memory.c:183: INFO: malloc 569659408 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > mem.c:817: INFO: set overcommit_memory to 0 > mem.c:817: INFO: set overcommit_ratio to 50 > > Summary: > passed 7 > failed 1 > skipped 0 > warnings 0 > <<>> > initiation_status="ok" > duration=0 termination_type=exited termination_id=1 corefile=no > cutime=0 cstime=1 > <<>> > <<>> > tag=overcommit_memory02 stime=1593425044 > cmdline="overcommit_memory -R 0" > contacts="" > analysis=exit > <<>> > tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s > overcommit_memory.c:116: INFO: MemTotal is 16394252 kB > overcommit_memory.c:118: INFO: SwapTotal is 268435452 kB > overcommit_memory.c:122: INFO: CommitLimit is 276632576 kB > mem.c:817: INFO: set overcommit_ratio to 0 > mem.c:817: INFO: set overcommit_memory to 2 > overcommit_memory.c:187: INFO: malloc 534667184 kB failed > overcommit_memory.c:208: PASS: alloc failed as expected > overcommit_memory.c:183: INFO: malloc 268435452 kB successfully > overcommit_memory.c:210: FAIL: alloc passed, expected to fail > overcommit_memory.c:183: INFO: malloc 133666730 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > mem.c:817: INFO: set overcommit_memory to 0 > overcommit_memory.c:183: INFO: malloc 140770304 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > overcommit_memory.c:187: INFO: malloc 569659408 kB failed > overcommit_memory.c:208: PASS: alloc failed as expected > mem.c:817: INFO: set overcommit_memory to 1 > overcommit_memory.c:183: INFO: malloc 142414852 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > overcommit_memory.c:183: INFO: malloc 284829704 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > overcommit_memory.c:183: INFO: malloc 569659408 kB successfully > overcommit_memory.c:202: PASS: alloc passed as expected > mem.c:817: INFO: set overcommit_memory to 0 > mem.c:817: INFO: set overcommit_ratio to 50 >