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ADD 821124 - Deadlock in extent conversion

To: lord@xxxxxxx
Subject: ADD 821124 - Deadlock in extent conversion
From: pv@xxxxxxxxxxxxx (ananth@xxxxxxxxxxxx)
Date: Fri, 13 Apr 2001 16:17:58 -0700 (PDT)
Cc: linux-xfs@xxxxxxxxxxx
Reply-to: sgi.bugs.xfs@xxxxxxxxxxxxxxxxx
Sender: owner-linux-xfs@xxxxxxxxxxx
Webexec: webpvupdate,pvincident
Webpv: sgigate.sgi.com
View Incident: 
http://co-op.engr.sgi.com/BugWorks/code/bwxquery.cgi?search=Search&wlong=1&view_type=Bug&wi=821124

 Status : closed                       Priority : 2                         
 Assigned Engineer : lord              Submitter : ananth                   
*Modified User : ananth               *Modified User Domain : engr          
*Description :
This problem seen with XFS 1.0 bits on a 64 M, 2CPU system with
1 scsi disk. Tests being run in parallel:

while true; do holes -l 300000000 -b 4099   -i 7 -c 7 /xfs/holes; date; done

and AIM 7, run to crossover.

It took about 3-4 hours to hit this problem, by then
AIM had gone to about 170 processes. In the end,
console became unresponsive ... looking at time-stamps

.....


==========================
ADDITIONAL INFORMATION (ADD)
From: ananth@engr (BugWorks)
Date: Apr 13 2001 04:17:58PM
==========================


Here is the backtrace:

----------
           pid 1078
                Function
            _write_buffer+0x2c 
            sync_buffers+0x1b4 
            fsync_dev+0x10 
            sys_sync+0x7
            panic+0x6a 
            [xfs_support]kmem_alloc_Rsmp_dc01ff11+0x112 
            [xfs_support]kmem_realloc_Rsmp_45126511+0x1a 
            [xfs]xfs_iext_realloc+0xf1 
            [xfs]xfs_bmap_insert_exlist+0x27 
            [xfs]xfs_bmap_add_extent_hole_delay+0x471 
[0]more> 
            [xfs]xfs_bmap_add_extent+0x157 
            [xfs]xfs_bmapi+0xac4 
            [xfs]xfs_iomap_write_delay+0x671 
            [xfs]xfs_iomap_write+0xe4 
            [xfs]xfs_bmap+0x136 
            [xfs]linvfs_pb_bmap+0x7f 
            [pagebuf]_pagebuf_file_write+0xf5 
            [pagebuf]pagebuf_generic_file_write_Rsmp_e7b5a739+0x10f 
            [xfs]xfs_write+0x28d 
            [xfs]linvfs_write+0x114 
            sys_write+0x8e 
            system_call+0x33
---------------------


ananth.

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