On 02/03/16 15:48, Shanker Donthineni wrote: > We haven't started running heavy workloads in VMs. So far we > have noticed this random nature behavior only during guest > kernel boot (at EL1). > > We didn't see this problem on 4.3 kernel. Do you think it is > related to TLB conflicts? I cannot imagine why a DSB would solve a TLB conflict. But the fact that you didn't see it crashing on 4.3 is a good indication that something else it at play. In 4.5, we've rewritten a large part of KVM in C, which has changed the ordering of the various accesses a lot. It could be that a latent problem is now exposed more widely. Can you try moving this DSB around and find out what is the earliest point where it solves this problem? Some sort of bisection? Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
