From: tytso@mit.edu
To: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-ext4@vger.kernel.org, Jens Axboe <jens.axboe@oracle.com>
Subject: Re: 2.6.33-rc1: kernel BUG at fs/ext4/inode.c:1063 (sparc)
Date: Thu, 24 Dec 2009 18:05:12 -0500 [thread overview]
Message-ID: <20091224230512.GA32757@thunk.org> (raw)
In-Reply-To: <a4423d670912241428n6917d2adsad887548612cf8ce@mail.gmail.com>
On Fri, Dec 25, 2009 at 01:28:34AM +0300, Alexander Beregalov wrote:
>
> Kernel is 2.6.33-rc1-00366-g2f99f5c
> Ext4 mounts ext3 filesystem
>
> kernel BUG at fs/ext4/inode.c:1063!
OK, that's this BUG which is triggering:
if (mdb_free) {
/* Account for allocated meta_blocks */
mdb_claim = EXT4_I(inode)->i_allocated_meta_blocks;
BUG_ON(mdb_free < mdb_claim); <------- BUG triggered
mdb_free -= mdb_claim;
Can you replicate this? If so, I'd like to ask you to replicate with
the following debugging patch applied:
--- fs/ext4/inode.c 2009-12-24 17:55:03.736366001 -0500
+++ fs/ext4/inode.c.new 2009-12-24 18:02:58.556366024 -0500
@@ -1060,6 +1060,10 @@
if (mdb_free) {
/* Account for allocated meta_blocks */
mdb_claim = EXT4_I(inode)->i_allocated_meta_blocks;
+ if (mdb_free < mdb_claim)
+ ext4_msg(inode->i_sb, KERN_ERR, "inode #%lu: "
+ "mdb_free (%d) < mdb_claim (%d) BUG\n",
+ inode->i_ino, mdb_free, mdb_claim);
BUG_ON(mdb_free < mdb_claim);
mdb_free -= mdb_claim;
Then once you get the inode number (suppose it's 12345), please send
the output of the following debugfs commands:
debugfs: stat <12345>
debugfs: ncheck 12345
Thanks!!
- Ted
next prev parent reply other threads:[~2009-12-24 23:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-24 22:28 2.6.33-rc1: kernel BUG at fs/ext4/inode.c:1063 (sparc) Alexander Beregalov
2009-12-24 22:49 ` Alexander Beregalov
2009-12-25 12:31 ` Dmitry Monakhov
2009-12-25 19:33 ` Alexander Beregalov
2009-12-25 23:47 ` Dmitry Monakhov
2009-12-27 20:32 ` Alexander Beregalov
2009-12-27 21:38 ` Dmitry Torokhov
2009-12-27 22:52 ` tytso
2009-12-27 23:02 ` Alexander Beregalov
2009-12-28 3:51 ` tytso
2009-12-30 5:37 ` tytso
2009-12-30 13:18 ` Dmitry Monakhov
2009-12-30 17:45 ` tytso
2009-12-30 17:48 ` tytso
2009-12-24 23:05 ` tytso [this message]
2009-12-24 23:15 ` tytso
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