Re: 2.6.13-mm3

Andrew Morton
2005-09-12T20:56:22Z

Sonny Rao <sonny@burdell.org> wrote:
>
> On Mon, Sep 12, 2005 at 12:56:41PM -0700, Andrew Morton wrote:
> > Sonny Rao <sonny@burdell.org> wrote:
> > >
> > > On Mon, Sep 12, 2005 at 02:43:50AM -0700, Andrew Morton wrote:
> > > <snip>
> > > > - There are several performance tuning patches here which need careful
> > > > attention and testing. (Does anyone do performance testing any more?)
> > > <snip>
> > > >
> > > > - The size of the page allocator per-cpu magazines has been increased
> > > >
> > > > - The page allocator has been changed to use higher-order allocations
> > > > when batch-loading the per-cpu magazines. This is intended to give
> > > > improved cache colouring effects however it might have the downside of
> > > > causing extra page allocator fragmentation.
> > > >
> > > > - The page allocator's per-cpu magazines have had their lower threshold
> > > > set to zero. And we can't remember why it ever had a lower threshold.
> > > >
> > >
> > > What would you like? The usual suspects: SDET, dbench, kernbench ?
> > >
> >
> > That would be a good start, thanks. The higher-order-allocations thing is
> > mainly targeted at big-iron numerical computing I believe.
>
> I assume you're referring to allocating huge pages?

No. I'm referring to ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13/2.6.13-mm3/broken-out/mm-try-to-allocate-higher-order-pages-in-rmqueue_bulk.patch