Bug 11964

Summary: JBD: grub-probe wants too many credits (266 > 256)
Product: File System Reporter: Theodore Tso (tytso)
Component: ext4Assignee: Theodore Tso (tytso)
Severity: normal CC: rjw
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: Tree: Mainline
Subsystem: Regression: Yes
Bug Depends on:    
Bug Blocks: 11808    

Description Theodore Tso 2008-11-06 13:34:28 UTC
Latest working kernel version: 2.6.26
Earliest failing kernel version: 2.6.27

Reported by Joseph Fannin (I can't find this in the web archives for some reason, so I'll cut and paste the relevant pars of the report):

Date:  Sun, 2 Nov 2008 19:48:27 -0500
From: Joseph Fannin <jfannin@gmail.com>
Subject: JBD2/ext4 error
To: linux-ext4@vger.kernel.org
Mail-Followup-To: linux-ext4@vger.kernel.org


I'm hitting what's probably a bug in ext4 on one of my boxes. It
always happens on the boot partition, which is extentless, since it
seems likely GRUB will choke on extents.

On with the backtrace, already:

[ 4586.330338] JBD: grub-probe wants too many credits (266 > 256)
[ 4586.330384] ext4_da_writepages: jbd2_start: 18691 pages, ino 39; err
[ 4586.330398] Pid: 7365, comm: grub-probe Not tainted
[ 4586.330456]  [<d806a2f4>] ext4_da_writepages+0x165/0x2c0 [ext4]
[ 4586.330562]  [<d80babf2>] scsi_pool_alloc_command+0x30/0x4a [scsi_mod]
[ 4586.330647]  [<c01dd1fd>] blk_rq_map_sg+0xf1/0x240
[ 4586.330671]  [<c01e4558>] kobject_get+0xf/0x13
[ 4586.330690]  [<d806a18f>] ext4_da_writepages+0x0/0x2c0 [ext4]
Comment 1 Theodore Tso 2008-11-06 13:39:29 UTC
Patch to fix this problem here: