lkml.org 
[lkml]   [2003]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: choice of raid5 checksumming algorithm wrong ?
From
Date
On Sat, 2003-01-11 at 20:39, Rene Rebe wrote:
> Hi.
>
> I also consider the kprint message a useability bug - and this is why
> I posted a patch that prints out that the algorithm is choosen to
> write "arround" the L2 cache ... - We patch this in our ROCK Linux
> standard patches ...

I would vote for such a cosmetic patch to be included...

Soeren.

> On: Sat, 11 Jan 2003 16:45:04 +0100,
> Lionel Bouton <Lionel.Bouton@inet6.fr> wrote:
> > Soeren Sonnenburg wrote:
> >
> > >Hi!
> > >
> > >I really do wonder whether the displayed message is wrong or why it
> > >always chooses the slowest checksumming function (happens with 2.4.19 -
> > >21pre3)
> > >
> > >
> > SSE is always preferred because unlike other checksumming code it
> > doesn't use the processor caches when reading/writing data/checksum.
> > This is slower (if several GB/s can be considered slow) for the
> > checksumming but far better for the overall system performance.
> >
> > LB.
>
> - René
>
> --
> René Rebe - Europe/Germany/Berlin
> e-mail: rene.rebe@gmx.net, rene@rocklinux.org
> web: www.rocklinux.org, drocklinux.dyndns.org/rene/
>
> Anyone sending unwanted advertising e-mail to this address will be
> charged $25 for network traffic and computing time. By extracting my
> address from this message or its header, you agree to these terms.


-
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 13:32    [W:0.056 / U:3.804 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site