Re: [PATCH 5 of 6] hotplug-memory: add section_ops

[Jeremy Fitzhardinge]

KAMEZAWA Hiroyuki wrote:
> On Thu, 03 Apr 2008 17:51:12 -0700
> Dave Hansen <dave@xxxxxxxxxxxxxxxxxx> wrote:
>
>   
> > On Thu, 2008-04-03 at 17:05 -0700, Jeremy Fitzhardinge wrote:
> >     
> > > Add a per-section "section_ops" structure,  allowing each section to have
> > > specific functions for onlining and offlining pages within the section.
> > > This is used by the Xen balloon driver to make sure that pages are not
> > > onlined without some physical memory backing them.
> > >       
> > This is kinda a lot of code and mucking around for what we actually get
> > out of it, especially since you just condensed down all the actual
> > online_page() instances.
> >
> > I think it might just be nicer to have a global list of these handlers
> > somewhere.  The Xen driver can just say "put me on the list of
> > callbacks" and we'll call them at online_page().  I really don't think
> > we need to be passing an ops structure around.
> >
> > KAME, did you have some other ideas about this?
> >
> >     
>
> At first. please don't call online_page() handler in add_memory() phase.
> online_page() handler should be called in online_pages().
>   

Yes, that's how it is at the moment.

> Passing handler to online_pages() is much easier and it's ok to me.
>   

Rather than an ops structure associated with the section?  That's a 
possibility...  I'll see how that looks...

   J
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/