The hypercall fails due to invalid write permissions on the page that's attempting to be pinned. Perhaps the page that's being pinned for PTEs was reused?
One fix that was applied to the upstream kernel for such problems was this: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=64141da587241301ce8638cc945f8b67853156ec I don't think that's the cause in this case since XFS isn't in use. Perhaps some other kernel subsystem is leaving pages behind in the vmalloc area with write permissions set? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/919431 Title: CPU soft lockup in Xen PTE allocation on m2.2xlarge instances To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-meta-ec2/+bug/919431/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
