linux-ext4 - [Bug 14256] kernel BUG at fs/ext3/super.c:435

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Message-Id: <200912141240.nBECeQxc018079@demeter.kernel.org>
Date:	Mon, 14 Dec 2009 12:40:26 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 14256] kernel BUG at fs/ext3/super.c:435

http://bugzilla.kernel.org/show_bug.cgi?id=14256





--- Comment #14 from Mikael Pettersson <mikpe@...uu.se>  2009-12-14 12:40:25 ---
With Jan Kara'a debugging patch on top of 2.6.32 final I get the following
after shutdown -r:

Unmounting file systems:  sb orphan head is 22
sb_info orphan list:
  inode sda2:22 at cc7c1618: mode 100600, nlink 0, next 13, i_count=2501
dentry=
NULL
  iget IPs:
 c009e590,
 c009dd08,
  inode sda2:13 at d1d932b8: mode 100600, nlink 0, next 12, i_count=2 dentry=
NULL
  iget IPs:
 c009e590,
 c009dd08,
  inode sda2:12 at d1de0618: mode 100600, nlink 0, next 0, i_count=1 dentry=
NULL
  iget IPs:
 c009e590,
 c009dd08,
kernel BUG at fs/ext3/super.c:450!

c009e590 is fs/fs-writeback.c:writeback_inodes_wb(), line 681.

c009dd08 is fs/fs-writeback.c:wait_sb_inodes(), line 1170.

I get this with both gcc-4.3.4 and gcc-4.4.2 compiled kernels.

On a second machine I got a similar result, except the three inodes had only
one iget IP recorded, and it was the one in writeback_inodes_wb().

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