linux-kernel - Re: [LKP] Re: [x86/entry] 2bbc68f837: ltp.ptrace08.fail

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Date:   Tue, 16 Jun 2020 20:24:52 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Alexandre Chartre <alexandre.chartre@...cle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        ltp@...ts.linux.it
Subject: Re: [LKP] Re: [x86/entry] 2bbc68f837: ltp.ptrace08.fail

On Tue, Jun 16, 2020 at 10:44:00AM +0200, Thomas Gleixner wrote:
> kernel test robot <rong.a.chen@...el.com> writes:
> > FYI, we noticed the following commit (built with gcc-9):
> >
> > commit: 2bbc68f8373c0631ebf137f376fbea00e8086be7 ("x86/entry: Convert Debug exception to IDTENTRY_DB")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> 
> Is the head of linux.git exposing the same problem or is this an
> intermittent failure, which only affects bisectability?
> 

Hi Thomas,

The problem still exists in v5.8-rc1:

9f58fdde95c9509a  2bbc68f8373c0631ebf137f376                    v5.8-rc1  testcase/testparams/testbox
----------------  --------------------------  --------------------------  ---------------------------
       fail:runs  %reproduction    fail:runs  %reproduction    fail:runs
           |             |             |             |             |    
           :12          92%          11:12         100%          13:13    ltp/1HDD-xfs-syscalls_part4/vm-snb
           :12          92%          11:12         100%          13:13    TOTAL ltp.ptrace08.fail

Best Regards,
Rong Chen