linux-kernel - Re: [PATCH v11 5/9] Reimplement RLIMIT

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Date:   Tue, 17 Aug 2021 04:03:50 +0000
From:   "Ma, XinjianX" <xinjianx.ma@...el.com>
To:     "legion@...nel.org" <legion@...nel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
CC:     lkp <lkp@...el.com>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "christian.brauner@...ntu.com" <christian.brauner@...ntu.com>,
        "containers@...ts.linux-foundation.org" 
        <containers@...ts.linux-foundation.org>,
        "ebiederm@...ssion.com" <ebiederm@...ssion.com>,
        "jannh@...gle.com" <jannh@...gle.com>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "oleg@...hat.com" <oleg@...hat.com>,
        "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v11 5/9] Reimplement RLIMIT_MSGQUEUE on top of ucounts

Hi Alexey,

When lkp team run kernel selftests, we found after these series of patches, testcase mqueue: mq_perf_tests
in kselftest failed with following message. 

If you confirm and fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot lkp@...el.com

```
# selftests: mqueue: mq_perf_tests
#
# Initial system state:
#       Using queue path:                       /mq_perf_tests
#       RLIMIT_MSGQUEUE(soft):                  819200
#       RLIMIT_MSGQUEUE(hard):                  819200
#       Maximum Message Size:                   8192
#       Maximum Queue Size:                     10
#       Nice value:                             0
#
# Adjusted system state for testing:
#       RLIMIT_MSGQUEUE(soft):                  (unlimited)
#       RLIMIT_MSGQUEUE(hard):                  (unlimited)
#       Maximum Message Size:                   16777216
#       Maximum Queue Size:                     65530
#       Nice value:                             -20
#       Continuous mode:                        (disabled)
#       CPUs to pin:                            3
# ./mq_perf_tests: mq_open() at 296: Too many open files
not ok 2 selftests: mqueue: mq_perf_tests # exit=1
```    

Test env:
rootfs: debian-10
gcc version: 9

------
Thanks 
Ma Xinjian