linux-kernel - [Q] Default SLAB allocator

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Date:	Thu, 11 Oct 2012 11:19:30 -0300
From:	Ezequiel Garcia <elezegarcia@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org
Cc:	Tim Bird <tim.bird@...sony.com>, celinux-dev@...ts.celinuxforum.org
Subject: [Q] Default SLAB allocator

Hello,

While I've always thought SLUB was the default and recommended allocator,
I'm surprise to find that it's not always the case:

$ find arch/*/configs -name "*defconfig" | wc -l
452

$ grep -r "SLOB=y" arch/*/configs/ | wc -l
11

$ grep -r "SLAB=y" arch/*/configs/ | wc -l
245

This shows that, SLUB being the default, there are actually more
defconfigs that choose SLAB.

I wonder...

* Is SLAB a proper choice? or is it just historical an never been re-evaluated?
* Does the average embedded guy knows which allocator to choose
  and what's the impact on his platform?

Thanks,

   Ezequiel
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