Re: 2.6.13-mm3

[Andrew Morton]

Sonny Rao <sonny@xxxxxxxxxxx> wrote:
>
> On Mon, Sep 12, 2005 at 12:56:41PM -0700, Andrew Morton wrote:
> > Sonny Rao <sonny@xxxxxxxxxxx> 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


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