Re: [PATCH 2/3] swsusp i386 mark special saveable/unsaveable pages

[Shaohua Li <shaohua.li@intel.com>]

On Wed, 2006-04-19 at 12:08 +1000, Nigel Cunningham wrote:
> Hi.
> 
> On Wednesday 19 April 2006 11:51, Shaohua Li wrote:
> > On Wed, 2006-04-19 at 11:41 +1000, Nigel Cunningham wrote:
> > > Oh, and while we're on the topic, if only part of a page is NVS, what's
> > > the right behaviour? My e820 table has:
> > >
> > > BIOS-e820: 000000003dff0000 - 000000003dffffc0 (ACPI data)
> > > BIOS-e820: 000000003dffffc0 - 000000003e000000 (ACPI NVS)
> >
> > If only part of a page is NVS, my patch will save the whole page. Any
> > other idea?
> 
> A device model driver that handles saving just the part of the page, using 
> preallocated buffers to avoid the potential allocation problems? (The whole 
> page could then safely be Nosave).
The allocation might not be a problem, this just needs one or two extra
pages. A problem is if just part of the page is NVS, could we touch
other part (save/restore) the page.

Thanks,
Shaohua