Hi Nitesh， On Wed, 29 Jul 2020 at 09:00, Wanpeng Li <kernellwp@xxxxxxxxx> wrote: > > On Tue, 28 Jul 2020 at 22:40, Nitesh Narayan Lal <nitesh@xxxxxxxxxx> wrote: > > > > Hi, > > > > I have recently come across an RCU trace with the 5.8-rc7 kernel that has the > > debug configs enabled while installing a VM on a CPU that is listed under > > nohz_full. > > > > Based on some of the initial debugging, my impression is that the issue is > > triggered because of the fastpath that is meant to optimize the writes to x2APIC > > ICR that eventually leads to a virtual IPI in fixed delivery mode, is getting > > invoked from the quiescent state. Could you try latest linux-next tree? I guess maybe some patches are pending in linux-next tree, I can't reproduce against linux-next tree.
