[Xen-devel] Re: [PATCH] xen: disable interrupts before saving in percpu

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

H. Peter Anvin wrote:
> Jeremy Fitzhardinge wrote:
>   
> > xen_mc_batch has a small preempt race where it takes the address of a
> > percpu variable immediately before disabling interrupts, thereby
> > leaving a small window in which we may migrate to another cpu and save
> > the flags in the wrong percpu variable.  Disable interrupts before
> > saving the old flags in a percpu.
> >     
> Applied to tip:core/xen, thanks!
Can you push this Linusward too?

Thanks,
   J

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