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Hi,
On 27 Jan 1998, Zlatko Calusic wrote:
> -#define SLAB_MIN_OBJS_PER_SLAB 4
> +#define SLAB_MIN_OBJS_PER_SLAB 1
>
> -#define SLAB_BREAK_GFP_ORDER 2
> +#define SLAB_BREAK_GFP_ORDER 1
Yes, being the author for the SLAB allocator, I've mentioned this
work-around several times. The change to SLAB_BREAK_GFP_ORDER (the only
one which really needs changing) was part of a patch I posted to linux-mm
last week - which received zero feed-back. The change to SLAB_MIN_OBJS
_PER_SLAB can hurt the slab's performance quite badly for some slab sizes,
but it will help those who suffer from numerious networking allocation
failures.
(For those who missed this patch, I've attached a description of changes
and placed the patch on my homepage; http://www.nextd.demon.co.uk/ It
reduces 'reserved' memory, and reduces the need to re-check the page-cache
after a possible blocking operation, along with a few other bits and
pieces - no rocket science).
markhe
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