Messages in this thread | | | Date | Sat, 11 Jan 2003 21:20:56 +0100 (CET) | Subject | Re: choice of raid5 checksumming algorithm wrong ? | From | Rene Rebe <> |
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Hi.
In the case s.o. wants to pull the patch:
http://www.rocklinux.org/sources/package/base/linux24/82-raid5-niceer-output.patch
It is only a one-liner. It is not really nice since I print the "writing arround L2 cache" text when XOR_SELECT_TEMPLATE is defined - this might also be the case for an later AlitVec version for PowerPC or so. So we might want a more generic text - or a text in the appropriated .h file whetre XOR_SELECT_TEMPLATE is defined ...
On: 11 Jan 2003 20:52:00 +0100, Soeren Sonnenburg <kernel@nn7.de> wrote: > 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/ > - 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/
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