From: Johannes Thumshirn <jthumshirn@suse.de>
To: Christoph Anton Mitterer <calestyo@scientia.net>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: delayed_refs has NO entry / btrfs_update_root:136: Aborting unused transaction(No space left).
Date: Mon, 15 Apr 2019 10:42:01 +0200 [thread overview]
Message-ID: <20190415084200.GA7586@linux-x5ow.site> (raw)
In-Reply-To: <e92b879b03f4838cc05c1b80d20917d3be1ba7f7.camel@scientia.net>
On Sat, Apr 13, 2019 at 12:46:28AM +0200, Christoph Anton Mitterer wrote:
> On Wed, 2019-03-20 at 10:59 +0100, Johannes Thumshirn wrote:
> > First of all, have you tried a more recent kernel than the Debian
> > kernels you referenced? E.g. Linus' current master or David's misc-
> > next
> > branch? Just so we don't try to hunt down a bug that's already fixed.
>
> I haven't and that's a bit difficult for me unless it's packaged by the
> distro (policy reasons).
>
>
> Also giving out the image is a bit problematic as it's huge (8TB).
>
> > Also if you can still reproduce the bug, please activate tracing in
> > btrfs and send the trace output.
>
> How would I do that?
>
>
> In the meantime, I think I can reproduce it with fresh images so could
> you try the following:
>
> # truncate --size 1G image
> # mkfs.btrfs image
>
> # mount -o compress image /mnt
> # cd /mnt
>
> # # create some data e.g.:
> # tar xaf /usr/src/linux-source-4.19.tar.xz
> # cd
> # umount /mnt
>
> # losetup -r -f image
> # mount -o compress /dev/loop0 /mnt
>
> # find /mnt -type f -exec filefrag -v {} \;
>
I'll give it a try.
>
> And there your kernel log will explode ;-)
>
> The culprit seems to be the device itself being read-only i.e.
> losetup's -r, respectively blockdev --setro DEVICE which I've used
> previously.
>
> If you repeat the above from the losetup point, but with -r ...
> everything works fine.
> Haven't checked whether -o compress actually makes a difference.
>
>
> Cheers,
> Chris.
>
>
--
Johannes Thumshirn SUSE Labs Filesystems
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
next prev parent reply other threads:[~2019-04-15 8:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-17 3:42 delayed_refs has NO entry / btrfs_update_root:136: Aborting unused transaction(No space left) Christoph Anton Mitterer
2019-03-20 0:59 ` Christoph Anton Mitterer
2019-03-20 9:59 ` Johannes Thumshirn
2019-04-12 22:46 ` Christoph Anton Mitterer
2019-04-12 22:52 ` Christoph Anton Mitterer
2019-04-15 8:42 ` Johannes Thumshirn [this message]
2019-05-03 2:42 ` Christoph Anton Mitterer
2019-05-16 9:12 ` Christoph Anton Mitterer
2019-05-29 13:55 ` Patch "Btrfs: do not start a transaction during fiemap" Christoph Anton Mitterer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190415084200.GA7586@linux-x5ow.site \
--to=jthumshirn@suse.de \
--cc=calestyo@scientia.net \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).