Re: [PATCH] x86: kvmclock: Do not setup kvmclock vsyscall in the absence of that clock

[Gleb Natapov <gleb@redhat.com>]

On Sun, Apr 07, 2013 at 01:38:48PM +0200, Jan Kiszka wrote:
> On 2013-04-07 13:37, Gleb Natapov wrote:
> > On Sun, Apr 07, 2013 at 01:33:05PM +0200, Jan Kiszka wrote:
> >> On 2013-02-27 12:19, Gleb Natapov wrote:
> >>> On Sat, Feb 23, 2013 at 05:05:29PM +0100, Jan Kiszka wrote:
> >>>> From: Jan Kiszka <jan.kiszka@siemens.com>
> >>>>
> >>>> This fixes boot lockups with "no-kvmclock", when the host is not
> >>>> exposing this particular feature (QEMU: -cpu ...,-kvmclock) or when
> >>>> the kvmclock initialization failed for whatever reason.
> >>>>
> >>>> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> >>> Applied, thanks.
> >>
> >> Just noticed that this fix isn't in Linus tree yet, thus also not yet in
> >> 3.8.y. Which route does it take?
> >>
> > It is scheduled to go into 3.10. To get it into 3.8.y we need to send it
> > to stable@.
> 
> Hmm, it's a bug fix for an ugly early kernel crash...
> 
It was not a regression introduced in 3.9 and this usually means that
fix is delayed to the next merge window. Severe bugs with simple fix
could be exceptions, and I probably misjudged this one. Note that the
patch is for 3.9 would have helped to avoid that. As it stands the patch
will go to 3.9 via stable.

--
			Gleb.