Re: [PATCH 09/19] mm: page_alloc: Use word-based accesses for get/set pageblock bitmaps

[Vlastimil Babka]

On 22.5.2014 20:23, Andrew Morton wrote:
> On Thu, 22 May 2014 11:24:23 +0200 Vlastimil Babka <vbabka@xxxxxxx> wrote:
>
> > > In a test running dd onto tmpfs the overhead of the pageblock-related
> > > functions went from 1.27% in profiles to 0.5%.
> > >
> > > Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
> > > Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
> > Hi, I've tested if this closes the race I've been previously trying to fix
> > with the series in http://marc.info/?l=linux-mm&m=139359694028925&w=2
> > And indeed with this patch I wasn't able to reproduce it in my stress test
> > (which adds lots of memory isolation calls) anymore. So thanks to Mel I can
> > dump my series in the trashcan :P
> >
> > Therefore I believe something like below should be added to the changelog,
> > and put to stable as well.
> OK, I made it so.

Thanks.

> Miraculously, the patch applies OK to 3.14.  And it compiles!

Great, shipping time!

Vlastimil
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