Re: [Xen-devel] [PATCH] xen: privcmd: schedule() after private hypercall when non CONFIG_PREEMPT

["Luis R. Rodriguez" <mcgrof@suse.com>]

On Mon, Dec 01, 2014 at 11:01:18AM +0000, David Vrabel wrote:
> On 28/11/14 04:49, Juergen Gross wrote:
> > On 11/27/2014 07:50 PM, Andrew Cooper wrote:
> >> 
> >> XenServer uses
> >>
> >> https://github.com/xenserver/linux-3.x.pg/blob/master/master/0001-x86-xen-allow-privcmd-hypercalls-to-be-preempted.patch
> >>
> >>
> >> to deal with these issues.  That patch is based on 3.10.
> > 
> > Clever. :-)
> > 
> >>
> >> I can remember whether this has been submitted upstream before (and
> >> there were outstanding issues), or whether it fell at an inconvenient
> >> time with our development cycles.
> > 
> > I found
> > 
> > http://lists.xen.org/archives/html/xen-devel/2014-02/msg02540.html
> > 
> > and nothing else.
> 
> I dropped it because it copy-and-paste a bunch of otherwise generic x86
> assembler and looked unlikely to get an x86 maintainer ack.  If you
> think otherwise, feel free to pick it up and run with it.

I was trying to run with it, but my biggest gripe with this was
the use of preempt_schedule_irq(), but we can review that on the
other thread.

  Luis