lkml.org 
[lkml]   [2007]   [Feb]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: pata_amd dropping to PIO on resume
Tobias Diedrich wrote:
> Possibly a known issue:
>
> After resume pata_amd drops from UDMA/33 to PIO on my system.
> Reloading the module puts both attached optical drives (master and
> slave) back to UDMA/33.
>
> AFAICS "simplex DMA is claimed by other device, disabling DMA" seems
> to be causing it to drop to PIO (but only after a suspend/resume
> cycle, not on boot or module load).
>
> Burning a DVD with 6x speed using PIO makes heavy use of burnproof
> and makes the whole system quite sluggish. :)

Yes, the fact that it's going into simplex mode is the problem, it
wasn't in simplex to start with. It looks like pata_amd does an
ata_pci_clear_simplex only for certain chip models, maybe this model
needs it as well?

--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-02-17 00:23    [W:0.195 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site