arm/158950: arm/sheevaplug fails fsx when mmap operations are enabled

[Kristof Provost]

The following reply was made to PR arm/158950; it has been noted by GNATS.

From: Kristof Provost <kristof at sigsegv.be>
To: bug-followup at FreeBSD.org
Cc:  
Subject: arm/158950: arm/sheevaplug fails fsx when mmap operations are enabled
Date: Mon, 7 May 2012 14:15:51 +0200

 Based on a suggestion from Ian Lepore I switched the data cache from 
 write-back to write-through mode. In that case the problem doesn't
 occur.
 
 Ian suggested this might indicate a problem in the busdma cacheline
 flush code, but unfortunately I'm somewhat out of my depth there.