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Date: Mon, 20 May 2019 06:04:46 -0400 (EDT)
From: Jan Stancek <jstancek@...hat.com>
To: kernel test robot <rong.a.chen@...el.com>
Cc: Johannes Weiner <hannes@...xchg.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>, lkp@...org,
Roman Gushchin <guro@...com>, ltp@...ts.linux.it,
naresh.kamboju@...aro.org
Subject: Re: [LTP] [mm] 8c7829b04c: ltp.overcommit_memory01.fail
----- Original Message -----
> FYI, we noticed the following commit (built with gcc-7):
>
> commit: 8c7829b04c523cdc732cb77f59f03320e09f3386 ("mm: fix false-positive
> OVERCOMMIT_GUESS failures")
This matches report from Naresh:
http://lists.linux.it/pipermail/ltp/2019-May/011962.html
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> 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 4G
>
> 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 <rong.a.chen@...el.com>
>
>
> [ 554.112267 ] <<<test_start>>>
> [ 554.112269 ]
> [ 554.115806 ] tag=overcommit_memory01 stime=1558074982
> [ 554.115809 ]
> [ 554.119303 ] cmdline="overcommit_memory"
> [ 554.119306 ]
> [ 554.121962 ] contacts=""
> [ 554.121965 ]
> [ 554.124459 ] analysis=exit
> [ 554.124463 ]
> [ 554.127140 ] <<<test_output>>>
> [ 554.127144 ]
> [ 554.131401 ] tst_test.c:1096: INFO: Timeout per run is 0h 05m 00s
> [ 554.131404 ]
> [ 554.136248 ] overcommit_memory.c:117: INFO: MemTotal is 4033124 kB
> [ 554.136251 ]
> [ 554.141365 ] overcommit_memory.c:119: INFO: SwapTotal is 268435452 kB
> [ 554.141368 ]
> [ 554.146664 ] overcommit_memory.c:123: INFO: CommitLimit is 270452012 kB
> [ 554.146666 ]
> [ 554.151375 ] mem.c:814: INFO: set overcommit_ratio to 50
> [ 554.151378 ]
> [ 554.155796 ] mem.c:814: INFO: set overcommit_memory to 2
> [ 554.155799 ]
> [ 554.159951 ] overcommit_memory.c:190: INFO: malloc 538608648 kB failed
> [ 554.159953 ]
> [ 554.164801 ] overcommit_memory.c:211: PASS: alloc failed as expected
> [ 554.164804 ]
> [ 554.170196 ] overcommit_memory.c:190: INFO: malloc 270452012 kB failed
> [ 554.170199 ]
> [ 554.175344 ] overcommit_memory.c:211: PASS: alloc failed as expected
> [ 554.175347 ]
> [ 554.180932 ] overcommit_memory.c:186: INFO: malloc 134651878 kB
> successfully
> [ 554.180935 ]
> [ 554.186522 ] overcommit_memory.c:205: PASS: alloc passed as expected
> [ 554.186524 ]
> [ 554.191234 ] mem.c:814: INFO: set overcommit_memory to 0
> [ 554.191237 ]
> [ 554.196930 ] overcommit_memory.c:186: INFO: malloc 134734122 kB
> successfully
> [ 554.196933 ]
> [ 554.202738 ] overcommit_memory.c:205: PASS: alloc passed as expected
> [ 554.202742 ]
> [ 554.208563 ] overcommit_memory.c:190: INFO: malloc 538936488 kB failed
> [ 554.208566 ]
> [ 554.214355 ] overcommit_memory.c:211: PASS: alloc failed as expected
> [ 554.214357 ]
> [ 554.220506 ] overcommit_memory.c:186: INFO: malloc 272468576 kB
> successfully
> [ 554.220509 ]
> [ 554.226564 ] overcommit_memory.c:213: FAIL: alloc passed, expected to fail
> [ 554.226568 ]
> [ 554.231870 ] mem.c:814: INFO: set overcommit_memory to 1
> [ 554.231873 ]
> [ 554.237819 ] overcommit_memory.c:186: INFO: malloc 136234288 kB
> successfully
> [ 554.237821 ]
> [ 554.243711 ] overcommit_memory.c:205: PASS: alloc passed as expected
> [ 554.243713 ]
> [ 554.249791 ] overcommit_memory.c:186: INFO: malloc 272468576 kB
> successfully
> [ 554.249794 ]
> [ 554.255069 ] overcommit_memory.c:205: PASS: alloc passed as expected
> [ 554.255073 ]
> [ 554.261594 ] overcommit_memory.c:186: INFO: malloc 544937152 kB
> successfully
> [ 554.261597 ]
> [ 554.267855 ] overcommit_memory.c:205: PASS: alloc passed as expected
> [ 554.267858 ]
> [ 554.273445 ] mem.c:814: INFO: set overcommit_memory to 0
> [ 554.273448 ]
> [ 554.278882 ] mem.c:814: INFO: set overcommit_ratio to 50
> [ 554.278885 ]
> [ 554.282419 ]
> [ 554.284170 ] Summary:
> [ 554.284173 ]
> [ 554.287476 ] passed 8
> [ 554.287480 ]
> [ 554.290740 ] failed 1
> [ 554.290743 ]
> [ 554.293971 ] skipped 0
> [ 554.293974 ]
> [ 554.297123 ] warnings 0
> [ 554.297126 ]
> [ 554.300746 ] <<<execution_status>>>
> [ 554.300749 ]
> [ 554.304489 ] initiation_status="ok"
> [ 554.304492 ]
> [ 554.309762 ] duration=0 termination_type=exited termination_id=1
> corefile=no
> [ 554.309765 ]
> [ 554.313681 ] cutime=0 cstime=0
> [ 554.313685 ]
> [ 554.316880 ] <<<test_end>>>
>
>
>
> To reproduce:
>
> # build kernel
> cd linux
> cp config-5.1.0-10246-g8c7829b .config
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage
>
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
> bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached
> in this email
>
>
>
>
> Thanks,
> Rong Chen
>
>
>
> --
> Mailing list info: https://lists.linux.it/listinfo/ltp
>
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