From: Juergen Gross <jgross@suse.com>
To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
x86@kernel.org
Cc: Juergen Gross <jgross@suse.com>,
Waiman.Long@hp.com, peterz@infradead.org, mingo@redhat.com,
bp@alien8.de, hpa@zytor.com, boris.ostrovsky@oracle.com,
tglx@linutronix.de
Subject: [PATCH 0/2] xen: fix two issues in Xen pv qspinlock handling
Date: Mon, 1 Oct 2018 09:16:39 +0200 [thread overview]
Message-ID: <20181001071641.19282-1-jgross__23403.480431489$1538378149$gmane$org@suse.com> (raw)
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
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next reply other threads:[~2018-10-01 7:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 7:16 Juergen Gross [this message]
2018-10-01 7:16 [PATCH 0/2] xen: fix two issues in Xen pv qspinlock handling Juergen Gross
2018-10-01 7:37 ` Juergen Gross
2018-10-01 7:37 ` Juergen Gross
2018-10-09 14:40 ` David Woodhouse
2018-10-09 14:40 ` David Woodhouse
2018-10-09 14:52 ` Juergen Gross
2018-10-09 14:52 ` Juergen Gross
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