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From: =?UTF-8?B?0JzQuNGF0LDQuNC7INCT0LDQstGA0LjQu9C+0LI=?=
	<mikhail.v.gavrilov@gmail.com>
Date: Thu, 17 Mar 2016 00:54:44 +0500
Message-ID: <CABXGCsOuopUNy6p3S69Fsbu6OROx9pgo7S5w3R-o11RoL4vJMg@mail.gmail.com>
Subject: Re: task btrfs-cleaner:770 blocked for more than 120 seconds.
To: Roman Mamedov <rm@romanrm.net>
Cc: Liu Bo <bo.li.liu@oracle.com>, Chris Murphy <lists@colorremedies.com>,
        Btrfs BTRFS <linux-btrfs@vger.kernel.org>
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Sender: linux-btrfs-owner@vger.kernel.org
List-ID: <linux-btrfs.vger.kernel.org>

2016-03-16 14:01 GMT+05:00 Roman Mamedov <rm@romanrm.net>:
> On Tue, 15 Mar 2016 09:18:14 +0500
> Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> wrote:
>
>> Yesterday btrfs again hangs on kernel 4.4.5
>> It's the same or another problem?
>
> Seems different to me, as there's also defrag involved. Try removing and not
> using the defrag mount option.

How then defragment FS?

>
>> This messages say that restore failed?
>
> So you can't mount the FS anymore? Did you try btrfsck, what does it report?
>

FS is mounted, but after failure mount takes a long time (more than 4
min) and Fedora  stops boot  by timeout (system suggest enter under
root for maintance) after reboot again all fine.

I'm just afraid of losing data after this messages:
[  449.949206] BTRFS warning (device sdc1): failed to load free space
cache for block group 2286562574336, rebuilding it now
[  452.619318] BTRFS: open_ctree failed

or it does not mean anything terrible?

--
Best Regards,
Mike Gavrilov.