On Fri, 2009-06-12 at 13:46 +0200, Stefan Lankes wrote: > > > I analyze Lee Schermerhorn's migrate memory on cpu migration patches > > > (http://free.linux.hp.com/~lts/Patches/PageMigration/). I think that > > Lee > > > Schermerhorn add similar functionalities to the kernel. He called the > > > "affinity-on-next-touch" functionality "migrate_on_fault" and uses in > > his > > > patches the normal NUMA memory policies. Therefore, his solution fits > > better > > > to the Linux kernel. I tested his patches with our test applications > > and got > > > nearly the same performance results. > > > > That's great to know. > > > > I didn't think he had a per process setting though, did he? > > He enables the support of migration-on-fault via cpusets (echo 1 > > /dev/cpuset/migrate_on_fault). > Afterwards, every process could initiate migration-on-fault via mbind(..., > MPOL_MF_MOVE|MPOL_MF_LAZY). I should have read through the entire thread before responding Andi's mail. > > > > I found only patches for the kernel 2.6.25-rc2-mm1. Does someone > > develop > > > these patches further? > > > > Not to much knowledge. Maybe Lee will pick them up again now that there > > are more use cases. > > > > If he doesn't have time maybe you could update them? > > We are planning to work in this area. I think that I could update these > patches. > At least, I am able to support Lee. I would like to get these patches working with latest mmotm to test on some newer hardware where I think they will help more. And I would welcome your support. However, I think we'll need to get Balbir and Kamezawa-san involved to sort out the interaction with memory control group. I can send you the more recent rebase that I've done. This is getting pretty old now: 2.6.28-rc4-mmotm-081110-081117. I'll try to rebase to the most recent mmotm [that boots on my platforms], at least so that we can build and boot with migrate-on-fault disabled, within the next couple of weeks. Regards, Lee -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
