panic: ext2fs_alloccg: map corrupted

[John Baldwin]

On Monday, April 25, 2011 3:45:00 pm Doug Barton wrote:
> I got the following panic on 9-current, r216869, amd64 SMP on a core 2 
> duo system. I'm running the older version (from 2011-01-01) to try and 
> determine where the problem I'm having with stability on -current first 
> occurred. If this problem was fixed between now and then, no worries.
> 
> This panic happened during heavy disk activity on the ext2fs partition. 
> The file core.txt.0.216869 is in my home directory on freefall if anyone 
> wants to take a look.

This looks like the panic that you reported earlier (and tested the fix for
IIRC).  The fix was comitted in 218438:

------------------------------------------------------------------------
r218438 | jhb | 2011-02-08 08:02:25 -0500 (Tue, 08 Feb 2011) | 6 lines

After reading a bitmap block for i-nodes or blocks, recheck the count of
free i-nodes or blocks to handle a race where another thread might have
allocated the last i-node or block while we were waiting for the buffer.

Tested by:      dougb

-- 
John Baldwin