linux-kernel - Re: [PATCH][v2] fork_init: fix division by zero

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Date:	Fri, 12 Dec 2008 12:31:33 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Al Viro <viro@...iv.linux.org.uk>, yur@...raft.com,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	Geert.Uytterhoeven@...ycom.com, dhowells@...hat.com,
	miltonm@....com, wd@...x.de, dzu@...x.de, yanok@...raft.com
Subject: Re: [PATCH][v2] fork_init: fix division by zero

On Friday 12 December 2008 07:43, Andrew Morton wrote:
> On Thu, 11 Dec 2008 20:28:00 +0000

> >  Do they actually cross the page boundaries?
>
> Some flavours of slab have at times done an order-1 allocation for
> objects which would fit into an order-0 page (etc) if it looks like
> that will be beneficial from a packing POV.  I'm unsure whether that
> still happens - I tried to get it stamped out for reliability reasons.

Hmph, SLUB uses order-3 allocations for 832 byte sized objects
by default here (mm struct).
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