From: Ming Lei <ming.lei@redhat.com>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-ext4@vger.kernel.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-block@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: REGRESSION: 37f4a24c2469: blk-mq: centralise related handling into blk_mq_get_driver_tag
Date: Fri, 18 Sep 2020 07:08:42 +0800 [thread overview]
Message-ID: <20200917230842.GA1139137@T590> (raw)
In-Reply-To: <20200917143012.GF38283@mit.edu>
On Thu, Sep 17, 2020 at 10:30:12AM -0400, Theodore Y. Ts'o wrote:
> On Thu, Sep 17, 2020 at 10:20:51AM +0800, Ming Lei wrote:
> >
> > Obviously there is other more serious issue, since 568f27006577 is
> > completely reverted in your test, and you still see list corruption
> > issue.
> >
> > So I'd suggest to find the big issue first. Once it is fixed, maybe
> > everything becomes fine.
> > ...
> > Looks it is more like a memory corruption issue, is there any helpful log
> > dumped when running kernel with kasan?
>
> Last night, I ran six VM's using -rc4 with and without KASAN; without
> Kasan, half of them hung. With KASAN enabled, all of the test VM's
> ran to completion.
From your last email, when you run -rc4 with revert of 568f27006577, you
can observe list corruption easily.
So can you enable KASAN on -rc4 with revert of 568f27006577 and see if
it makes a difference?
>
> This strongly suggests whatever the problem is, it's timing related.
> I'll run a larger set of test runs to see if this pattern is confirmed
> today.
Looks you enable lots of other debug options, such a lockdep, which has
much much heavy runtime load. Maybe you can disable all non-KASAN debug
option(non-KASAN memory debug options, lockdep, ...) and keep KASAN
debug only and see if you are lucky.
Thanks,
Ming
next prev parent reply other threads:[~2020-09-17 23:09 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-03 23:02 [PATCH] ext4: flag as supporting buffered async reads Jens Axboe
2020-08-11 14:31 ` Jens Axboe
2020-08-18 18:11 ` Theodore Y. Ts'o
2020-08-18 18:12 ` Jens Axboe
2020-08-21 21:26 ` Jens Axboe
2020-08-22 14:33 ` Theodore Y. Ts'o
2020-08-22 15:48 ` Jens Axboe
2020-08-24 10:56 ` Jens Axboe
2020-08-25 14:18 ` Jens Axboe
2020-08-27 1:54 ` Jens Axboe
2020-09-04 0:10 ` Jens Axboe
2020-09-04 3:55 ` Theodore Y. Ts'o
2020-09-04 14:51 ` Jens Axboe
2020-09-04 15:25 ` Darrick J. Wong
2020-09-15 4:45 ` REGRESSION: 37f4a24c2469: blk-mq: centralise related handling into blk_mq_get_driver_tag Theodore Y. Ts'o
2020-09-15 7:33 ` Ming Lei
2020-09-15 22:45 ` Theodore Y. Ts'o
2020-09-15 23:09 ` Ming Lei
2020-09-16 20:20 ` Theodore Y. Ts'o
2020-09-17 2:20 ` Ming Lei
2020-09-17 14:30 ` Theodore Y. Ts'o
2020-09-17 23:08 ` Ming Lei [this message]
2020-09-24 0:59 ` Ming Lei
2020-09-24 14:33 ` Theodore Y. Ts'o
2020-09-25 1:13 ` Theodore Y. Ts'o
2020-09-25 7:31 ` Ming Lei
2020-09-25 16:19 ` Ming Lei
2020-09-25 16:32 ` Shakeel Butt
2020-09-25 16:47 ` Shakeel Butt
2020-09-25 17:22 ` Roman Gushchin
2020-09-25 17:17 ` Linus Torvalds
2020-09-25 17:22 ` Shakeel Butt
2020-09-25 17:35 ` Shakeel Butt
2020-09-25 17:47 ` Roman Gushchin
2020-09-25 17:58 ` Shakeel Butt
2020-09-25 19:19 ` Shakeel Butt
2020-09-25 20:56 ` Roman Gushchin
2020-09-25 21:18 ` Shakeel Butt
2020-09-27 17:38 ` Theodore Y. Ts'o
2020-09-26 1:43 ` Ming Lei
2020-09-26 6:42 ` Roman Gushchin
2020-09-25 1:14 ` Ming Lei
2020-09-25 2:34 ` Ming Lei
2020-10-02 20:08 ` [PATCH] ext4: flag as supporting buffered async reads Theodore Y. Ts'o
2020-10-02 20:10 ` Jens Axboe
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