linux-kernel - Re: [Bug #19062] Dirtiable inode bdi default != sb bdi btrfs

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Date:	Sat, 2 Oct 2010 22:27:07 -0400
From:	Ted Ts'o <tytso@....edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Florian Mickler <florian@...kler.org>,
	Cesar Eduardo Barros <cesarb@...arb.net>,
	Tejun Heo <tj@...nel.org>, Jens Axboe <axboe@...nel.dk>
Subject: Re: [Bug #19062] Dirtiable inode bdi default != sb bdi btrfs

On Sat, Oct 02, 2010 at 11:58:35PM +0200, Rafael J. Wysocki wrote:
> On Saturday, October 02, 2010, Ted Ts'o wrote:
> > On Sun, Sep 26, 2010 at 10:04:15PM +0200, Rafael J. Wysocki wrote:
> > > The following bug entry is on the current list of known regressions
> > > from 2.6.35.  Please verify if it still should be listed and let the tracking team
> > > know (either way).
> > > 
> > > 
> > > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=19062
> > > Subject		: Dirtiable inode bdi default != sb bdi btrfs
> > > Submitter	: Cesar Eduardo Barros <cesarb@...arb.net>
> > > Date		: 2010-09-23 0:54 (4 days old)
> > > Message-ID	: <4C9AA546.6050201@...arb.net>
> > > References	: http://marc.info/?l=linux-kernel&m=128520328929595&w=2
> > 
> > Note: I'm seeing this warning (Dirtiable inode bdi default != sb bdi)
> > when I moved from 2.6.36-rc3 to 2.6.36-rc6, using ext4 as a root
> > partition, and running mke2fs and e2fsck on ext2, ext3, and ext4 file
> > systems.  So I'm seeing this as a known regression from rc3 to rc6.
> > Maybe it's different bug with ext4, but in any case, it's highly
> > annoying.
> 
> Thanks for the info.  I wonder who should see this report.

Oops, correction, the correct warning that I'm seeing is:

Dirtiable inode bdi block != sb bdi block
                    ^^^^^           ^^^^^

------------[ cut here ]------------
WARNING: at /usr/projects/linux/ext4/fs/fs-writeback.c:87 inode_to_bdi+0x4e/0x5c()
Hardware name: 
Dirtiable inode bdi block != sb bdi block
Modules linked in:
Pid: 21649, comm: mkfs.ext4 Tainted: G        W   2.6.36-rc6-00016-gcc25699 #735
Call Trace:
 [<c015a2e2>] warn_slowpath_common+0x6a/0x7f
 [<c020a762>] ? inode_to_bdi+0x4e/0x5c
 [<c015a36a>] warn_slowpath_fmt+0x2b/0x2f
 [<c020a762>] inode_to_bdi+0x4e/0x5c
 [<c020b6c3>] __mark_inode_dirty+0xaf/0x162
 [<c0202305>] file_update_time+0xcc/0xe9
 [<c01c68dd>] __generic_file_aio_write+0x136/0x28f
 [<c02145a4>] blkdev_aio_write+0x33/0x72
 [<c01f20da>] do_sync_write+0x8f/0xca
 [<c0647678>] ? mutex_unlock+0xd/0xf
 [<c030d528>] ? security_file_permission+0x27/0x2b
 [<c01f227c>] ? rw_verify_area+0x9d/0xc0
 [<c01f204b>] ? do_sync_write+0x0/0xca
 [<c01f2629>] vfs_write+0x85/0xe3
 [<c01f2725>] sys_write+0x40/0x62
 [<c064915d>] syscall_call+0x7/0xb
---[ end trace 1f39401760ab3a42 ]---

					- Ted
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