linux-kernel - 31-rc4-mmotm0730 - ext4 whinge at shutdown

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Date:	Mon, 03 Aug 2009 20:58:16 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...ux-foundation.org>,
	"Theodore Ts'o" <tytso@....edu>, Andreas Dilger <adilger@....com>
Cc:	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: 31-rc4-mmotm0730 - ext4 whinge at shutdown

Got this at system shutdown, while trying to unmount one of three ext4 file
system (note - the filesystems were all originally ext3, mounted as ext4, if
that matters).

RFE - if it's going to print the mballoc stats, it should at least dump
a major/minor pair so that I can tell which of my 3 ext4 filesystems each
one is talking about. :)

[  297.865667] EXT4-fs: mballoc: 0 blocks 0 reqs (0 success)
[  297.868397] EXT4-fs: mballoc: 0 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost
[  297.871459] EXT4-fs: mballoc: 0 generated and it took 0
[  297.874532] EXT4-fs: mballoc: 0 preallocated, 0 discarded
[  297.900378] ------------[ cut here ]------------
[  297.903618] WARNING: at fs/namespace.c:611 mntput_no_expire+0xd8/0x145()
[  297.906962] Hardware name: Latitude D820
[  297.910231] Modules linked in: ext4 jbd2 crc16 [last unloaded: scsi_wait_scan]
[  297.913357] Pid: 1783, comm: umount Not tainted 2.6.31-rc4-mmotm0730 #6
[  297.916352] Call Trace:
[  297.918164]  [<ffffffff8103fb1d>] warn_slowpath_common+0x77/0x8f
[  297.919706]  [<ffffffff8103fb44>] warn_slowpath_null+0xf/0x11
[  297.921172]  [<ffffffff810e80bf>] mntput_no_expire+0xd8/0x145
[  297.922797]  [<ffffffff810e86d0>] sys_umount+0x2de/0x30d
[  297.924312]  [<ffffffff810669d6>] ? trace_hardirqs_on_caller+0x121/0x145
[  297.925776]  [<ffffffff8100b2ab>] system_call_fastpath+0x16/0x1b
[  297.927343] ---[ end trace 6987d23c89c53046 ]---
[  297.982931] EXT4-fs: mballoc: 0 blocks 0 reqs (0 success)
[  297.984651] EXT4-fs: mballoc: 0 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost
[  297.986141] EXT4-fs: mballoc: 0 generated and it took 0
[  297.987772] EXT4-fs: mballoc: 0 preallocated, 0 discarded
[  297.993872] EXT4-fs: mballoc: 0 blocks 0 reqs (0 success)
[  297.995383] EXT4-fs: mballoc: 0 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost
[  297.996974] EXT4-fs: mballoc: 0 generated and it took 0
[  297.998595] EXT4-fs: mballoc: 0 preallocated, 0 discarded
[  301.239272] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[  301.244884] Restarting system.
[  301.247821] machine restart


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