linux-kernel - Re: [PATCH] xen/events: fix binding user event channels to cpus

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Message-ID: <20190702020951.GA8003@bostrovs-us.us.oracle.com>
Date:   Mon, 1 Jul 2019 22:09:51 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        Stefano Stabellini <sstabellini@...nel.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH] xen/events: fix binding user event channels to cpus

On Fri, Jun 21, 2019 at 08:47:03PM +0200, Juergen Gross wrote:
> When binding an interdomain event channel to a vcpu via
> IOCTL_EVTCHN_BIND_INTERDOMAIN not only the event channel needs to be
> bound, but the affinity of the associated IRQi must be changed, too.
> Otherwise the IRQ and the event channel won't be moved to another vcpu
> in case the original vcpu they were bound to is going offline.
> 
> Cc: <stable@...r.kernel.org> # 4.13
> Fixes: c48f64ab472389df ("xen-evtchn: Bind dyn evtchn:qemu-dm interrupt to next online VCPU")
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>