Re: [Lhms-devel] [PATCH 8/8] Fragmentation Avoidance V17: 008_stats

[Mel Gorman <mel@csn.ul.ie>]

On Wed, 12 Oct 2005, Dave Hansen wrote:

> On Tue, 2005-10-11 at 16:13 +0100, Mel Gorman wrote:
> > +#ifdef CONFIG_ALLOCSTAT
> > +               memset((unsigned long *)zone->fallback_count, 0,
> > +                               sizeof(zone->fallback_count));
> > +               memset((unsigned long *)zone->alloc_count, 0,
> > +                               sizeof(zone->alloc_count));
> > +               memset((unsigned long *)zone->alloc_count, 0,
> > +                               sizeof(zone->alloc_count));
> > +               zone->kernnorclm_partial_steal=0;
> > +               zone->kernnorclm_full_steal=0;
> > +               zone->reserve_count[RCLM_NORCLM] =
> > +                               realsize >> (MAX_ORDER-1);
> > +#endif
>
> The struct zone is part of the pgdat which is zeroed at boot-time on all
> architectures and configuration that I have ever audited.  Re-zeroing
> parts of it here is unnecessary.
>
> BTW, that '=0' with no spaces is anti-CodingStyle.
>

Blast, true. However, the whole block of code can be simply removed which
I prefer. I didn't like the #ifdef in the middle of the function.

-- 
Mel Gorman
Part-time Phd Student                          Java Applications Developer
University of Limerick                         IBM Dublin Software Lab
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