On Tue, Dec 16, 2008 at 09:53:39AM -0600, Jon Nelson wrote: > On Tue, Dec 16, 2008 at 9:26 AM, Jon Nelson > <jnelson-linux-raid@xxxxxxxxxxx> wrote: > > On Tue, Dec 16, 2008 at 4:10 AM, Keld Jørn Simonsen <keld@xxxxxxxx> wrote: > >> On Mon, Dec 15, 2008 at 10:28:30PM -0600, Jon Nelson wrote: > >>> On Mon, Dec 15, 2008 at 10:03 PM, Keld Jørn Simonsen <keld@xxxxxxxx> wrote: > >>> > >>> > there was a pach to speed up raid10,f2 check in a recent kernel, > >>> > something like 2.6.27. It did improve thruput from something > >>> > like 40 % to about 90 %. What kernel are you using? > >>> > >>> 2.6.25.18-0.2-default > >> > >> I believe the patch arrived in a later kernel. If you can try it out > >> with a vanilla kernel and report, I think it would be quite interesting. > > > > I'm pretty sure I did try it out and did have an improvement. > > However, thanks to the power of the openSUSE build service, I am going > > to build a kernel just now, if I can. > > Scratch that. I decided to just do this at home. The suse kernel > 2.6.25.18-0.2 appears to have this patch already. Thus, I've been > running with this patch. OK, well, then the patch did not apply to check, but only to resync. One could write up a similar patch for check as what was done for resync. The idea of the previous patch was to read quite much data in a striped way, say 10 - 20 MB at a time. best regards keld -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
