BUG 808315 - Full file systems can become corrupted with XFS Linux.

[pv@xxxxxxxxxxxxx (cattelan@xxxxxxxxxxxx)]

View Incident: 
http://co-op.engr.sgi.com/BugWorks/code/bwxquery.cgi?search=Search&wlong=1&view_type=Bug&wi=808315

Submitter : cattelan                  Submitter Domain : engr               
Assigned Engineer : nb                Assigned Domain : sgi.com             
Assigned Group : xfs-linux            Category : software                   
Customer Reported : T                 Priority : 2                          
Project : xfs-linux                   Status : open                         
Description :
Linux XFS may corrupt file system when disk si filled.

Very large write requests causes portions of the user data IO path
to continue writing beyond the end of an allocted extent thus over-writting
the start of the next AG. 

This usally show up as trashed secondary super blocks and probably
other data structures in the AG.