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

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Message-ID: <9840f232-acc4-310d-d87d-8fbf329a9664@suse.com>
Date:   Mon, 1 Oct 2018 09:37:01 +0200
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        x86@...nel.org
Cc:     boris.ostrovsky@...cle.com, hpa@...or.com, tglx@...utronix.de,
        mingo@...hat.com, Borislav Petkov <bp@...en8.de>,
        peterz@...radead.org, Waiman Long <longman@...hat.com>
Subject: Re: [PATCH 0/2] xen: fix two issues in Xen pv qspinlock handling

Correcting Waiman's mail address

On 01/10/2018 09:16, 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: longman@...hat.com
> Cc: peterz@...radead.org
>