Re: [patch 00/41] cpu alloc / cpu ops v3: Optimize per cpu access

Christoph Lameter
2008-05-30T18:12:29Z

On Fri, 30 May 2008, Matthew Wilcox wrote:

> On Fri, May 30, 2008 at 10:50:04AM -0700, Christoph Lameter wrote:
> > cpu alloc v2 had an extendable per cpu space. You have the patches. We
> > could put this on top of this patchset if necessary. But then it not so
> > nice and simple anymore. Maybe we can rstrict the use of cpu alloc
> > instead to users with objects < cache_line_size() or so?
>
> Restricting the use of cpu_alloc based on size of object is no good when
> you're trying to allocate 45,000 objects. Extending the per CPU space
> is the only option.

Ok guess we need to bring the virtually mapped per cpu patches forward.