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

[Andrew Morton]

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.

Miraculously, the patch applies OK to 3.14.  And it compiles!
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/