linux-kernel - Re: [PATCHv2 2/2] xtensa: use buddy allocator for PTE table

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Message-ID: <CAMo8Bf+vAe3q+jJ6qv_ZqGZO=-3h40AHhZ==AbKfYV76wbn79Q@mail.gmail.com>
Date:	Wed, 16 Oct 2013 00:44:03 +0400
From:	Max Filippov <jcmvbkbc@...il.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Chris Zankel <chris@...kel.net>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	"linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>
Subject: Re: [PATCHv2 2/2] xtensa: use buddy allocator for PTE table

On Mon, Oct 14, 2013 at 7:44 PM, Kirill A. Shutemov
<kirill.shutemov@...ux.intel.com> wrote:
> Corrected patch below.
>
> From 0ba2ac687321f5ad7bac5f5c141da5b65b957fdc Mon Sep 17 00:00:00 2001
> From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
> Date: Mon, 14 Oct 2013 13:38:21 +0300
> Subject: [PATCHv3] xtensa: use buddy allocator for PTE table
>
> At the moment xtensa uses slab allocator for PTE table. It doesn't work
> with enabled split page table lock: slab uses page->slab_cache and
> page->first_page for its pages. These fields share stroage with
> page->ptl.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Cc: Chris Zankel <chris@...kel.net>
> Cc: Max Filippov <jcmvbkbc@...il.com>
> ---
> v3:
>  - return correct value from pte_alloc_one_kernel();
> v2:
>  - add missed return in pte_alloc_one_kernel();

Acked-by: Max Filippov <jcmvbkbc@...il.com>

-- 
Thanks.
-- Max
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