Re: Virtual address space exhaustion (was Discontigmem virt_to_page() )

From: Andrea Arcangeli (
Date: Fri May 03 2002 - 11:58:06 EST

On Fri, May 03, 2002 at 06:41:15PM +0200, Daniel Phillips wrote:
> On Friday 03 May 2002 18:20, Andrea Arcangeli wrote:
> > On Fri, May 03, 2002 at 06:02:18PM +0200, Daniel Phillips wrote:
> > > and solves 75% of the problem. It's not just ia32 numa that will benefit
> > > from it. For example, MIPS supports 16K pages in software, which will
> >
> > the whole change would be specific to ia32, I don't see the connection
> > with mips. There would be nothing to share between ia32 2M pages and
> > mips 16K pages.
> The topic here is 'page clustering'. The idea is to use one struct page for
> every four 4K page frames on ia32.

ah ok, I meant physical hardware pages. physical hardware pages should
be doable without common code changes, a software PAGE_SIZE or the
PAGE_CACHE_SIZE raises non trivial problems instead.

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