linux-kernel - Re: v4.16-rc2: virtio-block + ext4 lockdep splats / sleeping from invalid context

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Message-ID: <20180227120358.6x5pnhgv7o2z62iz@lakrids.cambridge.arm.com>
Date:   Tue, 27 Feb 2018 12:03:59 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Jan Kara <jack@...e.cz>
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-ext4@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Theodore Ts'o <tytso@....edu>, Jan Kara <jack@...e.com>
Subject: Re: v4.16-rc2: virtio-block + ext4 lockdep splats / sleeping from
 invalid context

On Mon, Feb 26, 2018 at 01:44:55PM +0100, Jan Kara wrote:
> On Mon 26-02-18 11:38:19, Mark Rutland wrote:
> > That seems to be it!
> > 
> > With the below patch applied, I can't trigger the bug after ~10 minutes,
> > whereas prior to the patch I can trigger it in ~10 seconds. I'll leave
> > that running for a while just in case there's another part to the
> > problem, but FWIW:
> > 
> > Tested-by: Mark Rutland <mark.rutland@....com>
> 
> Thanks for testing! Sent the patch to Jens for inclusion.

Cheers!

FWIW, I left my test case running for a day with no issue, so this looks
rock solid.

Mark.