From: Andrew Morton <akpm@linux-foundation.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: wd@denx.de, dzu@denx.de, miltonm@bga.com,
linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org,
Al Viro <viro@zeniv.linux.org.uk>,
Geert.Uytterhoeven@sonycom.com, yanok@emcraft.com
Subject: Re: [PATCH][v2] fork_init: fix division by zero
Date: Thu, 11 Dec 2008 18:47:53 -0800 [thread overview]
Message-ID: <20081211184753.97d0db7a.akpm@linux-foundation.org> (raw)
In-Reply-To: <200812121331.34602.nickpiggin@yahoo.com.au>
On Fri, 12 Dec 2008 12:31:33 +1000 Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> 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).
That sucks, but at least it's <= PAGE_ALLOC_COSTLY_ORDER.
It's fortunate that everyone has more than 128GB of memory.
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@linux-foundation.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
yur@emcraft.com, linux-kernel@vger.kernel.org,
linuxppc-dev@ozlabs.org, Geert.Uytterhoeven@sonycom.com,
dhowells@redhat.com, miltonm@bga.com, wd@denx.de, dzu@denx.de,
yanok@emcraft.com
Subject: Re: [PATCH][v2] fork_init: fix division by zero
Date: Thu, 11 Dec 2008 18:47:53 -0800 [thread overview]
Message-ID: <20081211184753.97d0db7a.akpm@linux-foundation.org> (raw)
In-Reply-To: <200812121331.34602.nickpiggin@yahoo.com.au>
On Fri, 12 Dec 2008 12:31:33 +1000 Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> 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).
That sucks, but at least it's <= PAGE_ALLOC_COSTLY_ORDER.
It's fortunate that everyone has more than 128GB of memory.
next prev parent reply other threads:[~2008-12-12 2:48 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-10 16:50 [PATCH][v2] fork_init: fix division by zero Yuri Tikhonov
2008-12-10 16:50 ` Yuri Tikhonov
2008-12-11 20:16 ` Andrew Morton
2008-12-11 20:16 ` Andrew Morton
2008-12-11 20:28 ` Al Viro
2008-12-11 20:28 ` Al Viro
2008-12-11 20:43 ` Andrew Morton
2008-12-11 20:43 ` Andrew Morton
2008-12-12 2:31 ` Nick Piggin
2008-12-12 2:31 ` Nick Piggin
2008-12-12 2:47 ` Andrew Morton [this message]
2008-12-12 2:47 ` Andrew Morton
2008-12-12 3:36 ` Nick Piggin
2008-12-12 3:36 ` Nick Piggin
2008-12-11 22:22 ` Re[2]: " Yuri Tikhonov
2008-12-11 22:22 ` Yuri Tikhonov
2008-12-11 22:26 ` Andrew Morton
2008-12-11 22:26 ` Andrew Morton
2008-12-12 0:48 ` Paul Mackerras
2008-12-12 0:48 ` Paul Mackerras
2008-12-12 1:07 ` Andrew Morton
2008-12-12 1:07 ` Andrew Morton
2008-12-18 7:47 ` Yuri Tikhonov
2008-12-18 7:47 ` Yuri Tikhonov
2008-12-18 22:45 ` Andrew Morton
2008-12-18 22:45 ` Andrew Morton
2008-12-19 5:49 ` Re[2]: " Yuri Tikhonov
2008-12-19 5:49 ` Yuri Tikhonov
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