linux-kernel - Re: [PATCH] [11/18] Fix alignment bug in bootmem allocator

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Message-ID: <86802c440803170017r622114bdpede8625d1a8ff585@mail.gmail.com>
Date:	Mon, 17 Mar 2008 00:17:31 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Andi Kleen" <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, pj@....com, linux-mm@...ck.org,
	nickpiggin@...oo.com.au
Subject: Re: [PATCH] [11/18] Fix alignment bug in bootmem allocator

On Mon, Mar 17, 2008 at 12:02 AM, Andi Kleen <andi@...stfloor.org> wrote:
> > node_boot_start is not page aligned?
>
>  It is, but it is not necessarily GB aligned and without this
>  change sometimes alloc_bootmem when requesting GB alignment
>  doesn't return GB aligned memory. This was a nasty problem
>  that took some time to track down.

or preferred has some problem?

preferred = PFN_DOWN(ALIGN(preferred, align)) + offset;

YH
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