On Sat, Apr 11, 2015 at 12:57:54PM -0700, Nathan Whitehorn wrote: > > > On 02/18/15 15:33, Nathan Whitehorn wrote: > > > >On 02/18/15 14:00, Paul Mackerras wrote: > >>On Wed, Feb 18, 2015 at 09:34:54AM +0100, Alexander Graf wrote: > >>>>Am 18.02.2015 um 07:12 schrieb Nathan Whitehorn > >>>><nwhitehorn@xxxxxxxxxxx>: > >>>> > >>>>It seems like KVM doesn't implement the H_CLEAR_REF and H_CLEAR_MOD > >>>>hypervisor calls, which are absolutely critical for memory > >>>>management in the FreeBSD kernel (and are marked "mandatory" in the > >>>>PAPR manual). It seems some patches have been contributed already in https://lists.ozlabs.org/pipermail/linuxppc-dev/2011-December/095013.html, > >>>>so it would be fantastic if these could end up upstream. > >>>Paul, I guess we never included this because there was no user. If > >>>FreeBSD does use it though, I think it makes a lot of sense to resend > >>>it for inclusion. > >>I agree. I just need to check the locking and synchronization around > >>the reference and change bit recording, then I'll resend it. > > > >Thanks much! Please let me know if I can help at all with this. > > Any news on this? I'm happy to test the patch if you like. > -Nathan I have discovered a bug where we can lose the host-side view of the dirtiness of pages when the guest does a H_CLEAR_MOD on a huge-page HPTE, so I'm working on a fix for that. Paul. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
