Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Juergen Gross <jgross@suse.com>
To:     linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
        x86@kernel.org
Cc:     boris.ostrovsky@oracle.com, hpa@zytor.com, tglx@linutronix.de,
        mingo@redhat.com, bp@alien8.de, Juergen Gross <jgross@suse.com>,
        Waiman.Long@hp.com, peterz@infradead.org
Subject: [PATCH 0/2] xen: fix two issues in Xen pv qspinlock handling
Date:   Mon,  1 Oct 2018 09:16:39 +0200
Message-Id: <20181001071641.19282-1-jgross@suse.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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@hp.com
Cc: peterz@infradead.org

-- 
2.16.4