Re: [Xen-devel] [PATCH 10 of 12] xen: implement save/restore

[Jeremy Fitzhardinge]

Isaku Yamahata wrote:
> On Mon, Jun 02, 2008 at 11:03:36AM +0100, Jeremy Fitzhardinge wrote:
>   
> > Isaku Yamahata wrote:
> >     
> > > What is the purpose of load_cr3() here?
> > > I'd like to make this load_cr3() more arch generic for ia64 support.
> > > (or eliminate it if possible)
> > >  
> > >       
> > I think it's an unnecessary left-over from when I was trying to get that 
> > stuff to work.  I can't think of a good reason not to just remove it if 
> > it causes you problems.
> >     
>
> Here is the patch. I did only compile test.
>
>
>   
> > BTW, I tried to split the suspend/resume stuff into common and things 
> > which were definitely x86-specific with you in mind.  How close did I get?
> >     
>
> Almost complete. Your effort made my task easier.
> I haven't yet succeeded to save/restore, though.
>
> Is CONFIG_PM_SLEEP necessary?
>   
Yes.

It's necessary because the Xen save/restore code calls into various core 
functions to handle things like resuming timekeeping; that code is 
compiled controlled by CONFIG_PM_SLEEP.

> Since ia64 doesn't define ARCH_HIBERNATION_POSSIBLE nor
> ARCH_SUSPEND_POSSIBLE.
> Although I can define them in ia64/xen/Kconfig, I'd like to leave
> them untouched if possible.
>   

Hm, not sure how can address that then.

I'll confirm test that the load_cr3() is unnecessary later today.

   J
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