linux-kernel - Re: [PATCH] x86, percpu: revert commit fe8e0c25

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Message-ID: <AANLkTinnc3vBSmewf7ixuOSDYxG+5VNiGaB-vSrDNRiO@mail.gmail.com>
Date:	Tue, 26 Oct 2010 08:08:56 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Brian Gerst <brgerst@...il.com>
Cc:	Tejun Heo <tj@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	David Howells <dhowells@...hat.com>, akpm@...ux-foundation.org,
	linux-am33-list@...hat.com, linux-kernel@...r.kernel.org,
	Akira Takeuchi <takeuchi.akr@...panasonic.com>,
	Mark Salter <msalter@...hat.com>
Subject: Re: [PATCH] x86, percpu: revert commit fe8e0c25

On Tue, Oct 26, 2010 at 6:49 AM, Brian Gerst <brgerst@...il.com> wrote:
>
> Probably the best fix is to go back to allocating the stacks with
> get_free_pages(), and only keep the pointers in percpu memory.

Yes, please do. The "irq stack in percpu area" upsides are almost zero
afaik, and the complexity required for it has been ridiculous.

                                 Linus
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