From: Keir Fraser <keir.xen@gmail.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Olaf Hering <olaf@aepfle.de>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: pv-on-hvm kexec, howto reregister timer interrupt
Date: Sat, 23 Jul 2011 10:55:06 +0100 [thread overview]
Message-ID: <CA50590A.1E720%keir.xen@gmail.com> (raw)
In-Reply-To: <1311408105.4027.80.camel@dagon.hellion.org.uk>
On 23/07/2011 09:01, "Ian Campbell" <Ian.Campbell@citrix.com> wrote:
>> Sounbds like it's simply some Linux-guest issue here to be untangled. All
>> Xen requires you to do is EVTCHNOP_close the old virq-evtchn binding.
>
> That might be tricky to do in the target kernel, which may not know what
> needs closing. There's EVTCHNOP_reset which looks like it would be a
> sensible thing to call early on in the target but seems like it would
> close to much -- e.g. the xenstore evtchn?
If you can't do it in the source kernel (e.g., because it's crashed) the
best bet is to call EVTCHN_status on every port to find the channels you
want to clobber. Which is what Olaf hacked up already I believe, just needs
integrating cleanly.
-- Keir
prev parent reply other threads:[~2011-07-23 9:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-22 18:49 pv-on-hvm kexec, howto reregister timer interrupt Olaf Hering
2011-07-23 6:57 ` Keir Fraser
2011-07-23 8:01 ` Ian Campbell
2011-07-23 8:52 ` Olaf Hering
2011-07-23 9:55 ` Keir Fraser [this message]
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