linux-kernel - Re: [PATCH] x86-32: Allocate irq stacks seperate from percpu area

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Message-ID: <AANLkTim_3vhuJt2gYQEM5p=wxVU1Jsm6reTgQZsu_o7B@mail.gmail.com>
Date:	Wed, 27 Oct 2010 08:19:50 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Brian Gerst <brgerst@...il.com>
Cc:	tj@...nel.org, x86@...nel.org, linux-kernel@...r.kernel.org,
	mingo@...e.hu
Subject: Re: [PATCH] x86-32: Allocate irq stacks seperate from percpu area

On Tue, Oct 26, 2010 at 10:43 PM, Brian Gerst <brgerst@...il.com> wrote:
> The percpu allocator cannot handle alignments larger than one page.
> Allocate the irq stacks seperately, and only keep the pointers as
> percpu data.

Ok, so I definitely want this (although it sounds like it would be
good to do the allocation numa-aware - possibly a separate issue).

However, I also want to remove all the crap that got added for the
multi-page percpu support. It was ugly, and apparently never really
worked. All the PER_CPU_MULTIPAGE_ALIGNED crud just needs to go away.

Ingo, can you take care of this all, or should I just take the patch
and remove the multipage stuff manually?

                                  Linus
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