On 11/7/18 5:45 PM, Sander Eikelenboom wrote: > On 07/11/18 23:34, Boris Ostrovsky wrote: >> On 11/7/18 4:30 AM, Sander Eikelenboom wrote: >>> Hi Juergen / Boris, >>> >>> Last week i tested Linux kernel 4.19.0 stable with the Xen "for-linus-4.20" >>> branch pulled on top. >>> Unfortunately i was seeing guests lockup after some time, see below for the >>> logging from one of the guest >>> which i was able to capture. >>> Reverting "xen: make xen_qlock_wait() nestable" >>> 7250f6d35681dfc44749d90598a2d51a118ce2b8, >>> made the lockups disappear. >>> >>> These guests are stressed quite hard in both CPU and networking, >>> so they are probably more susceptible to locking issues. >>> >>> System is a AMD phenom x6, running Xen-unstable. >>> >>> Any ideas ? >> >> By any chance, is VMPU on? >> >> >> -boris >> > Had to look up what that is :), but seems only applicable to PV guests if i'm > correct ?
No, it is applicable to HVM guests as well. > > I'm only running PVH and HVM guests at the moment, except for dom0 of course, > which reports: > [ 0.941407] VPMU disabled by hypervisor. OK, you don't have it. (I asked because I was thinking of NMIs) -boris > > These soft lockups were in a HVM guest (if i remember correctly, i have seen > a PVH guest lockup as well after a while (also a quite heavy cpu/network > stressed one). > > -- > Sander > > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
