Messages in this thread | | | Subject | Re: [PATCH 0/2] xen: fix two issues in Xen pv qspinlock handling | From | Juergen Gross <> | Date | Tue, 9 Oct 2018 16:52:28 +0200 |
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On 09/10/2018 16:40, David Woodhouse wrote: > 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@hp.com >> Cc: peterz@infradead.org > > LGTM. Both these should be Cc:stable@vger.kernel.org, yes?
Yes, they are.
I have them already queued in the Xen tree. As the bug is rather old I didn't want to rush the patches in so late in the rc phase of 4.19.
Juergen
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