lkml.org 
[lkml]   [2003]   [Sep]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: DMA for ide-scsi?
Date
On Saturday 13 of September 2003 13:01, Mikael Pettersson wrote:
> On Sat, 13 Sep 2003 08:29:18 +0200, Jens Axboe <axboe@suse.de> wrote:
> >> Actually with 2.6, you no longer need ide-scsi. You'll need to upgrade
> >> your cdrecord tools and probably your burning GUI, if you use one. I've
> >> been burning that way for several months now. (I'm using xcdroast,
> >> though I need to start it with "-n" since I'm using cdrecord 2.01a18.)
> >> This actually works better for me than ide-scsi as for some reason it
> >> uses less CPU.
> >
> >That's because it _is_ faster. It contains no silly memory allocations
> >for the buffer and data copying in the kernel, the data is mapped from
> >the user buffer and DMA'ed directly from there. It also uses DMA where
> >ide-scsi wont.
>
> That begs the question: why won't ide-scsi do DMA?
> I understand you'd rather see it disappear (:->) but since I use
> it for other ATAPI devices as well, I'd like to see it maintained
> and fully operational. Having DMA in ide-scsi would be nice.

ide-scsi maintainer position is available :-).

> (And the concept of using a SCSI API to ATA devices is in itself
> not broken, even if the implementation has some problems.)

It is not broken short-term, however it is broken long-term.

> /Mikael

-
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: 2005-03-22 13:48    [W:0.042 / U:0.648 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site