linux-ext4 - Re: Test generic/299 stalling forever

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ffc283a7-58ef-66b9-3c5b-75703d24ea0d@fb.com>
Date:   Wed, 12 Oct 2016 20:39:57 -0600
From:   Jens Axboe <axboe@...com>
To:     "Theodore Ts'o" <tytso@....edu>
CC:     Dave Chinner <david@...morbit.com>, <linux-ext4@...r.kernel.org>,
        <fstests@...r.kernel.org>, <tarasov@...ily.name>
Subject: Re: Test generic/299 stalling forever

On 10/12/2016 08:15 PM, Theodore Ts'o wrote:
> On Wed, Oct 12, 2016 at 03:19:25PM -0600, Jens Axboe wrote:
>>
>> FWIW, this is the commit that fixes it:
>>
>> commit 39d13e67ef1f4b327c68431f8daf033a03920117
>> Author: Jens Axboe <axboe@...com>
>> Date:   Fri Aug 26 14:39:30 2016 -0600
>>
>>     backend: check if we need to update rusage stats, if stat_mutex is busy
>>
>> 2.14 and newer should not have the problem, but earlier versions may
>> depending on how old...
>
> Unfortunately, I'm still seeing hangs in generic/299 with the latest version of fio:
>
> fio 	  fio-2.14-10-g0a301e9 (Fri, 23 Sep 2016 11:57:00 -0600)

Well, that's no good.

> If I use an older fio, it reliably does not hang.  What can I do to
> help debug this?

If I just wanted to invoke generic/299 with a setup similar to yours,
what should I do? I can attempt to reproduce it.

> As I said, I can attach to the hanging fio using a gdb and give you
> stackdumps for all of the threads if that would be helpful.

That would definitely be helpful as well, especially if I cannot
reproduce it.

-- 
Jens Axboe

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html