linux-kernel - Re: [PATCH RFC v5 00/21] DEPT(Dependency Tracker)

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Message-ID: <YjZd5ff1DiKQnsrv@mit.edu>
Date:   Sat, 19 Mar 2022 18:49:09 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Byungchul Park <byungchul.park@....com>
Cc:     torvalds@...ux-foundation.org, damien.lemoal@...nsource.wdc.com,
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Subject: Re: [PATCH RFC v5 00/21] DEPT(Dependency Tracker)

On Fri, Mar 18, 2022 at 04:49:45PM +0900, Byungchul Park wrote:
> 
> I guess it was becasue of the commit b1fca27d384e8("kernel debug:
> support resetting WARN*_ONCE"). Your script seems to reset WARN*_ONCE
> repeatedly.

I wasn't aware this was being done, but your guess was correct.  The
WARN_ONCE state is getting cleared between each test in xfstests, with
the rationale (which IMO is quite reasonable) why this done in the
xfstests commit descrition:

commit c67ea2347454aebbe8eb6e825e9314d099b683da
Author: Lukas Czerner <lczerner@...hat.com>
Date:   Wed Jul 15 13:42:19 2020 +0200

    check: clear WARN_ONCE state before each test
    
    clear WARN_ONCE state before each test to allow a potential problem
    to be reported for each test
    
    [Eryu: replace "/sys/kernel/debug" with $DEBUGFS_MNT ]
    
    Signed-off-by: Lukas Czerner <lczerner@...hat.com>
    Reviewed-by: Zorro Lang <zlang@...hat.com>
    Signed-off-by: Eryu Guan <guaneryu@...il.com>

Cheers,

						- Ted