On Mon, Nov 19, 2018 at 05:07:55PM +0000, Julien Thierry wrote: > While testing KVM running on PREEMPT_RT, starting guest could simply > freeze the machine. This is because we are using spinlocks for VGIC > locks, which is invalid in the VGIC case since the locks must be take > with interrupts disabled. > > The solution is to use raw_spinlock instead of spinlocks. > > Replacing those locks also highlighted an issue where we attempt to > cond_resched with interrupts disabled. > > Patch 1 fixes the cond_resched issue.
I don't agree with this fix without seeing a more thorough analysis. > Patch 2-4 replace the VGIC spinlocks with raw_spinlocks > For these: Acked-by: Christoffer Dall <[email protected]> Thanks, Christoffer _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
