[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] soft lockups during live migrate..
On Thu, Oct 22, 2009 at 09:21:49PM -0700, Mukesh Rathor wrote: > > > Trying to migrate a 64bit PV guest with 64GB running medium to heavy load > on xen 3.4.0, it is showing lot of soft lockups. The softlockups are > causing dom0 reboot by the cluster FS. The hardware has 256GB and 32 > CPUs. > Did you try with Xen 3.4.1 or the latest xen-3.4-testing.hg ? There are a lot of fixes after 3.4.0 .. -- Pasi > Looking into the hypervisor thru kdb, I see one cpu in sh_resync_all() > while all other 31 appear spinning on the shadow_lock. I vaguely remember > seeing some thread on this while ago, but just can't seem to google find > it now. I'm trying to figure what could be done in the short run. > > Now that guests are getting bigger in memory, bugs of this nature are slowly > popping up under medium/heavy load. I've been thinking of what could be > done to adderss those in the long run. May be create a certain class of > pages, that once migrated, are 'w' protected, and any write faults on them > are resolved on the target system, is one idea. Incidentally, IBM took > the reverse approach. The (VCPU) contexts are migrated and pages are > pulled in. > > > thanks, > Mukesh > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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