Re: [Lhms-devel] Re: [patch 0/3] memory hotplug prototype

[IWAMOTO Toshihiro]

At Thu, 08 Apr 2004 18:16:10 +0900,
IWAMOTO Toshihiro wrote:
> 
> At Wed, 07 Apr 2004 11:12:55 -0700,
> Martin J. Bligh <mbligh@xxxxxxxxxxx> wrote:
> > 
> > > This is an updated version of memory hotplug prototype patch, which I
> > > have posted here several times.
> > 
> > I really, really suggest you take a look at Dave McCracken's work, which
> > he posted as "Basic nonlinear for x86" recently. It's going to be much
> > much easier to use this abstraction than creating 1000s of zones ...
> 
> Well, I think his patch is orthogonal to mine.  My ultimate target
> is IA64 and it will only support node-sized memory hotplugging.
> 
> If you need fine-grained memory resizing, that shouldn't be hard to
> do.  As others have pointed out, per section hotremovable is not as
> easy as per zone one, but we've done a similar thing for hugetlbfs
> support.  Look for PG_again in Takahashi's patch.

Err, s/PG_again/PG_booked/
Pages with PG_booked bit set are skipped in alloc_pages.
Alternatively, when such pages are freed, they can be linked to
another list than free_list to avoid being used again, but buddy
bits handling would be a bit tricky in this case.

--
IWAMOTO Toshihiro

-
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/