Quoting Tamas Papp ([email protected]): > On 07/16/2014 09:39 PM, Serge Hallyn wrote > > I've personally not seen it, and noone on my team, who use a lot of > > kvm instances, has seen it. Our two current theories are that (a) it > > has to do with ksm page migration across numa-nodes, or (b) it has to > > do with a race with transparent hugepages versus ksm. For (b) there is > > already a commit in Linus' tree (f72e7dcd). For (a), you can probably > > Are you referring to this or a different one? > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1323165
No, this commit is commit f72e7dcdd25229446b102e587ef2f826f76bff28 Author: Hugh Dickins <[email protected]> Date: Mon Jun 23 13:22:05 2014 -0700 mm: let mm_find_pmd fix buggy race with THP fault which seems later than that bug. > > test by setting /sys/kernel/mm/ksm/merge_across_nodes to 0. (We are > > trying these as well, but as the testcases are not 100% positive > > it'd be good to have you try as well) > > It's 1 now. > Do you you want me to set it now or wait to the result of KSM_ENABLED=0? Oh - I forgot you had KSM_ENABLED=0 :) there's no sense changing merge_across_nodes in the meantime. (To be sure - /sys/kernel/mm/ksm/run is in fact set to 0 now right?) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1341195 Title: KVM guests getting slow by time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1341195/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
