From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sergei Trofimovich <slyich@gmail.com>
Subject: Re: [PATCH] Btrfs: fix easily get into ENOSPC in mixed case
Date: Mon, 11 Apr 2011 23:27:01 +0300
Message-ID: <20110411232701.102494bd@sf>
References: <20110402121946.6bf27f80@sf.home>
	<4D96EE76.5040208@cn.fujitsu.com>
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	<4D9708E0.6030206@cn.fujitsu.com>
	<20110402155545.2159043a@sf.home>
	<4D9ECAF5.50108@cn.fujitsu.com>
	<20110409000932.6154c7b5@sf>
	<20110409001920.089c4409@sf>
	<20110409005555.4b136f25@sf>
	<4DA29FC1.9050900@cn.fujitsu.com>
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Cc: linux-btrfs@vger.kernel.org, Josef Bacik <josef@redhat.com>,
	Arne Jansen <sensille@gmx.net>
To: liubo <liubo2009@cn.fujitsu.com>
Return-path: <linux-btrfs-owner@vger.kernel.org>
In-Reply-To: <4DA29FC1.9050900@cn.fujitsu.com>
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On Mon, 11 Apr 2011 14:29:21 +0800
liubo <liubo2009@cn.fujitsu.com> wrote:

> On 04/09/2011 05:55 AM, Sergei Trofimovich wrote:
> > [  100.500011] Call Trace:
> > [  100.500011]  [<ffffffff810ed3a0>] vfs_unlink+0x80/0xf0
> > [  100.500011]  [<ffffffff810ef6f3>] do_unlinkat+0x173/0x1b0
> > [  100.500011]  [<ffffffff8111727b>] ? fsnotify_find_inode_mark+0x3b/0x=
50
> > [  100.500011]  [<ffffffff810dff91>] ? filp_close+0x61/0x90
> > [  100.500011]  [<ffffffff810f0c0d>] sys_unlinkat+0x1d/0x40
> > [  100.500011]  [<ffffffff81574c3b>] system_call_fastpath+0x16/0x1b
> > [  100.500011] Code: 4c 8b 65 e0 48 8b 5d d8 4c 8b 6d e8 4c 8b 75 f0 4c=
 8b 7d f8 c9 c3 0f 1f 40 00 4c 89 fe 4c 89 ef e8 05 d0 ff ff 85 c0 74 bb 0f=
 0b <0f> 0b 89 c3 eb cd 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57=20
> > [  100.500011] RIP  [<ffffffffa024a011>] btrfs_unlink+0xd1/0xe0 [btrfs]
> > [  100.500011]  RSP <ffff880070b55e28>
> > [  100.525672] ---[ end trace 7e63b9144b7307fe ]---
> >=20
> > Looks like I won't be able to test your patch until this thing will go =
away first.
>=20
> Thanks a lot for testing, though.
>=20
> I guess something messed up your btrfs metadata, cause when btrfs_unlink(=
) wanted to remove A,
> it found that A was just missing...
Looks like it's ret =3D -28 (a ENOSPC). Yes, you are right. Moreover, as Ar=
ne found out,
I used wrong patch for btrfs-progs to create --mixed filesystems. I set wro=
ng bit in
superblock (the 8ULL << 0, not 4ULL << 0) - the COMPRESS_LZO, so my metadat=
a is
really screwed.

Please, disregard all my OOpses reported against --mixed FS. Sorry.

--=20

  Sergei

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