From: David Howells <dhowells@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: dhowells@redhat.com, viro@ZenIV.linux.org.uk,
torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, hch@infradead.org,
akpm@linux-foundation.org, apw@canonical.com, nbd@openwrt.org,
neilb@suse.de, jordipujolp@gmail.com, ezk@fsl.cs.sunysb.edu,
sedat.dilek@gmail.com, hooanon05@yahoo.co.jp, mszeredi@suse.cz
Subject: Kernel errors with overlay filesystem v22
Date: Thu, 29 May 2014 11:54:41 +0100 [thread overview]
Message-ID: <27993.1401360881@warthog.procyon.org.uk> (raw)
In-Reply-To: <1400838223-30844-1-git-send-email-miklos@szeredi.hu>
When I run my unionmount testsuite against overlayfs, I get the following
lockdep warning (unionmount is not in the kernel sources in this test):
================================================
[ BUG: lock held when returning to user space! ]
3.15.0-rc6-fsdevel+ #363 Tainted: G W
------------------------------------------------
mount/4183 is leaving the kernel with locks still held!
1 lock held by mount/4183:
#0: (sb_writers#8){.+.+.+}, at: [<ffffffff8112bf5b>] mnt_want_write+0x1c/0x40
The mounts involved look like:
lower_layer /lower tmpfs ro,seclabel,relatime 0 0
upper_layer /upper tmpfs rw,seclabel,relatime 0 0
overlayfs /mnt overlayfs rw,relatime,lowerdir=/lower,upperdir=/upper/upper,workdir=/upper/work 0 0
I get a busy inodes warning on unmounting /upper (/mnt unmounts okay):
BUG: Dentry ffff88002795feb8{i=2e8e,n=work} still in use (1) [unmount of tmpfs tmpfs]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2981 at /data/fs/linux-2.6-fscache/fs/dcache.c:1262 umount_check+0x76/0x7a()
Modules linked in:
CPU: 0 PID: 2981 Comm: umount Tainted: G W 3.15.0-rc6-fsdevel+ #363
Hardware name: /DG965RY, BIOS MQ96510J.86A.0816.2006.0716.2308 07/16/2006
0000000000000000 ffff8800383b7d38 ffffffff8148b669 0000000000000000
ffff8800383b7d70 ffffffff81038887 ffffffff81125407 ffff8800279368a0
00000000000005d0 ffff88003b76f630 ffff88002795feb8 ffff8800383b7d80
Call Trace:
[<ffffffff8148b669>] dump_stack+0x4d/0x66
[<ffffffff81038887>] warn_slowpath_common+0x7a/0x93
[<ffffffff81125407>] ? umount_check+0x76/0x7a
[<ffffffff8103893f>] warn_slowpath_null+0x15/0x17
[<ffffffff81125407>] umount_check+0x76/0x7a
[<ffffffff811238bc>] d_walk+0x134/0x2ff
[<ffffffff811251ab>] ? do_one_tree+0x21/0x34
[<ffffffff81125391>] ? dget_parent+0x13f/0x13f
[<ffffffff811251ab>] do_one_tree+0x21/0x34
[<ffffffff81125dbf>] shrink_dcache_for_umount+0x42/0x6b
[<ffffffff81112e73>] generic_shutdown_super+0x1c/0xe8
[<ffffffff8111309b>] kill_anon_super+0xd/0x17
[<ffffffff811130c3>] kill_litter_super+0x1e/0x21
[<ffffffff8111344e>] deactivate_locked_super+0x27/0x48
[<ffffffff81113ff5>] deactivate_super+0x39/0x3c
[<ffffffff8112bc50>] mntput_no_expire+0x237/0x258
[<ffffffff8112d001>] ? SyS_umount+0x3ba/0x3db
[<ffffffff8112d001>] SyS_umount+0x3ba/0x3db
[<ffffffff814923f4>] ? tracesys+0xdd/0xe2
[<ffffffff8100d737>] ? syscall_trace_enter+0x197/0x1eb
[<ffffffff814923f4>] tracesys+0xdd/0xe2
---[ end trace 11bb9aeb6ce29610 ]---
VFS: Busy inodes after unmount of tmpfs. Self-destruct in 5 seconds. Have a nice day...
next prev parent reply other threads:[~2014-05-29 10:55 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-23 9:43 [PATCH 00/13] overlay filesystem v22 Miklos Szeredi
2014-05-23 9:43 ` [PATCH 01/13] vfs: add i_op->dentry_open() Miklos Szeredi
2014-05-23 9:43 ` [PATCH 02/13] vfs: export do_splice_direct() to modules Miklos Szeredi
2014-05-23 9:43 ` [PATCH 03/13] vfs: export __inode_permission() " Miklos Szeredi
2014-05-23 9:43 ` [PATCH 04/13] vfs: introduce clone_private_mount() Miklos Szeredi
2014-05-23 9:43 ` [PATCH 05/13] vfs: export check_sticky() Miklos Szeredi
2014-05-23 9:43 ` [PATCH 06/13] vfs: add whiteout support Miklos Szeredi
2014-05-24 8:29 ` Tetsuo Handa
2014-05-23 9:43 ` [PATCH 07/13] vfs: add RENAME_WHITEOUT Miklos Szeredi
2014-05-24 8:02 ` Azat Khuzhin
2014-05-23 9:43 ` [PATCH 08/13] overlay filesystem Miklos Szeredi
2014-05-23 9:43 ` [PATCH 09/13] overlayfs: add statfs support Miklos Szeredi
2014-05-23 9:43 ` [PATCH 10/13] overlayfs: implement show_options Miklos Szeredi
2014-05-23 9:43 ` [PATCH 11/13] overlay: overlay filesystem documentation Miklos Szeredi
2014-05-23 9:43 ` [PATCH 12/13] fs: limit filesystem stacking depth Miklos Szeredi
2014-05-23 9:43 ` [PATCH 13/13] vfs: dcache: Export d_ancestor to modules Miklos Szeredi
2014-05-26 1:56 ` [PATCH 00/13] overlay filesystem v22 J. R. Okajima
2014-05-28 16:06 ` Miklos Szeredi
2014-05-29 10:26 ` David Howells
2014-05-29 11:26 ` Miklos Szeredi
2014-05-29 10:54 ` David Howells [this message]
2014-05-29 11:16 ` Kernel errors with " David Howells
2014-05-29 11:28 ` David Howells
2014-05-29 12:07 ` Miklos Szeredi
2014-05-29 16:06 ` Miklos Szeredi
2014-05-29 16:10 ` Sedat Dilek
2014-05-29 16:23 ` More kernel " David Howells
2014-05-29 16:36 ` Miklos Szeredi
2014-05-29 16:44 ` David Howells
2014-05-29 16:48 ` Unionmount and overlayfs testsuite David Howells
2014-05-29 17:11 ` Sedat Dilek
2014-05-29 17:15 ` David Howells
2014-05-29 17:19 ` Sedat Dilek
2014-05-29 17:24 ` David Howells
2014-05-29 17:36 ` Sedat Dilek
2014-05-29 17:41 ` David Howells
2014-05-29 17:44 ` Sedat Dilek
2014-05-29 18:22 ` David Howells
2014-05-29 18:44 ` Sedat Dilek
2014-05-29 18:53 ` Sedat Dilek
2014-05-29 19:20 ` David Howells
2014-05-29 19:24 ` Sedat Dilek
2014-05-29 19:25 ` David Howells
2014-05-29 19:28 ` Sedat Dilek
2014-05-29 19:35 ` David Howells
2014-05-29 20:00 ` Sedat Dilek
2014-05-29 20:59 ` David Howells
2014-05-30 4:15 ` Sedat Dilek
2014-05-30 4:29 ` Sedat Dilek
2014-05-30 7:54 ` David Howells
2014-05-29 17:35 ` Sedat Dilek
2014-05-29 17:50 ` David Howells
2014-05-29 17:58 ` Sedat Dilek
2014-05-29 18:23 ` Dave Jones
2014-05-29 18:27 ` David Howells
2014-05-29 17:17 ` David Howells
2014-05-29 23:21 ` Dave Chinner
2014-05-30 3:35 ` J. R. Okajima
2014-05-30 4:44 ` J. R. Okajima
2014-05-30 8:49 ` David Howells
2014-05-30 9:15 ` J. R. Okajima
2014-06-03 8:08 ` Sedat Dilek
2014-06-03 9:00 ` David Howells
2014-06-03 9:12 ` Miklos Szeredi
2014-06-03 9:18 ` Sedat Dilek
2014-06-03 9:26 ` Sedat Dilek
2014-06-03 9:39 ` Sedat Dilek
2014-06-03 9:42 ` Miklos Szeredi
2014-06-03 10:15 ` Sedat Dilek
2014-06-03 10:21 ` Sedat Dilek
2014-06-03 10:55 ` Sedat Dilek
2014-06-03 10:33 ` David Howells
2014-06-03 13:21 ` Miklos Szeredi
2014-06-03 14:26 ` Sedat Dilek
2014-06-03 15:30 ` David Howells
2014-06-03 15:53 ` Miklos Szeredi
2014-06-05 22:16 ` David Howells
2014-06-24 16:46 ` Overlayfs rename bug David Howells
2014-07-08 9:29 ` Miklos Szeredi
2014-07-08 9:56 ` David Howells
2014-07-09 14:14 ` Miklos Szeredi
2014-05-30 9:14 ` Unionmount and overlayfs testsuite David Howells
2014-05-29 17:29 ` Kernel errors with overlay filesystem v22 David Howells
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