Re: [PATCH v2 6/8] kvm tools: Add rwlock wrapper

Paul E. McKenney
2011-06-15T04:23:15Z

On Tue, Jun 14, 2011 at 09:25:22PM -0400, Sasha Levin wrote:
> On Tue, 2011-06-14 at 16:42 -0700, Paul E. McKenney wrote:
> > On Tue, Jun 14, 2011 at 06:26:01PM -0400, Sasha Levin wrote:
> > > Sorry for the delay on this.
> >
> > Actually, you might have had excellent timing on this one.
> >
> > Could you please try Shaohua Li's patch at:
> >
> > https://lkml.org/lkml/2011/6/14/20
> >
> > This patch makes RCU much less prone to causing massive scheduler lock
> > contention, which might well be the cause of the problems that you
> > are seeing.
>
> This patch has solved the hang issue I've had. kvm tools now boots 60
> vcpus easily with 3.0 kernel.

Thank you, Sasha -- I have added your Tested-by.

Thanx, Paul