Re: [PATCH 1/7] mm: introduce simple_malloc()/simple_free()

From: Arjan van de Ven
Date: Sat Nov 15 2008 - 23:52:31 EST


On Sun, 16 Nov 2008 12:33:15 +0800
Lai Jiangshan <laijs@xxxxxxxxxxxxxx> wrote:

>
> some subsystem needs vmalloc() when required memory is large.
> but current kernel has not APIs for this requirement.
> this patch introduces simple_malloc() and simple_free().

Hi

I kinda really don't like this approach. vmalloc() (and especially,
vfree()) is a really expensive operation, and vmalloc()'d memory is
also slower (due to tlb pressure). Realistically, people should try hard
to use small datastructure instead....


--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
--
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/