Re: choice of raid5 checksumming algorithm wrong ?

[Rene Rebe <rene.rebe@gmx.net>]

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 ...

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
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