linux-kernel - Re: [PATCH] mm: make free_bootmem to loop bdata

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Message-ID: <86802c440803131839n4f723d14md906a15acb26c3a2@mail.gmail.com>
Date:	Thu, 13 Mar 2008 18:39:34 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>, mingo@...e.hu,
	clameter@....com, linux-kernel@...r.kernel.org,
	"Andi Kleen" <ak@...e.de>, "Yasunori Goto" <y-goto@...fujitsu.com>
Subject: Re: [PATCH] mm: make free_bootmem to loop bdata_list

On Thu, Mar 13, 2008 at 6:39 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
> On Thu, 13 Mar 2008 11:53:31 -0700
>  "Yinghai Lu" <yhlu.kernel@...il.com> wrote:
>  > ===================================================================
>  > --- linux-2.6.orig/mm/bootmem.c
>  > +++ linux-2.6/mm/bootmem.c
>  > @@ -427,7 +438,9 @@ int __init reserve_bootmem(unsigned long
>  >
>  >  void __init free_bootmem(unsigned long addr, unsigned long size)
>  >  {
>  > -     free_bootmem_core(NODE_DATA(0)->bdata, addr, size);
>  > +     bootmem_data_t *bdata;
>  > +     list_for_each_entry(bdata, &bdata_list, list)
>  > +             free_bootmem_core(bdata, addr, size);
>  >  }
>
>
>  Just a confirmation.
>  In above loop, boundary check in free_bootmem_core() hits two or more times ?
>  If yes, it's ok.
>  If no, please exit loop at hit.

yes. need that handle range cross node (RAMDISK case that is end
beyond end_of_ram).

YH
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