linux-kernel - Re: block: hung task writing to device

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Message-ID: <720248fc-22fa-1fd3-08a4-e582adb38037@kernel.dk>
Date:   Sat, 8 Jul 2017 19:29:20 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: block: hung task writing to device

On 07/08/2017 01:06 PM, Levin, Alexander (Sasha Levin) wrote:
> Hi all,
> 
> syzkaller seems to be hitting a lockup with the reproducer below:

Thanks for the reproducer, but this is missing a lot of detail that we
need to debug this issue. Is this a regression since 4.12? What storage
device is this? Is the device using an IO scheduler?

dmesg after boot and .config would be helpful, too.

-- 
Jens Axboe