Re: [Xen-devel] [PATCH 0/2] xen: fix two issues in Xen pv qspinlock handling

[David Woodhouse <dwmw2@xxxxxxxxxxxxx>]

On Mon, 2018-10-01 at 09:16 +0200, Juergen Gross wrote:
> The Xen specific queue spinlock wait function has two issues which
> could result in a hanging system.
> 
> They have a similar root cause of clearing a pending wakeup of a
> waiting vcpu and later going to sleep waiting for the just cleared
> wakeup event, which of course won't ever happen.
> 
> Juergen Gross (2):
>   xen: fix race in xen_qlock_wait()
>   xen: make xen_qlock_wait() nestable
> 
>  arch/x86/xen/spinlock.c | 33 ++++++++++++---------------------
>  1 file changed, 12 insertions(+), 21 deletions(-)
> 
> Cc: Waiman.Long@xxxxxx
> Cc: peterz@xxxxxxxxxxxxx

LGTM. Both these should be Cc:stable@xxxxxxxxxxxxxxx, yes?

Thanks.

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