Re: kern/45034: Satalink driver downgrades from DMA to PIO 4 from soft errors (sandpoint/PowerPc)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR kern/45034; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
netbsd-bugs%NetBSD.org@localhost
Subject: Re: kern/45034: Satalink driver downgrades from DMA to PIO 4 from
 soft errors (sandpoint/PowerPc)
Date: Tue, 14 Jun 2011 18:22:23 +0200

 On Thu, Jun 09, 2011 at 03:00:01PM +0000, oscarmolin%gmail.com@localhost wrote:
 > When performing large file transfers (tested over NFS) onto harddrives 
 > attached to silicon image 3512 controller, soft errors occur and causes the 
 > satalink driver to downgrade from DMA to PIO 4 mode, causing big performance 
 > penalty.
 > 
 > This has been tested with all for available SATA channels (my system has  
 > 2x2-port controllers) and with different harddrives and SATA cables.
 > 
 > After rebooting, the harddrives function at full speed again but when large 
 > transfers are started, soft errors occur after a short while.
 
 please give more details about the error (the kernel messages for
 example)
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --