linux-kernel - Re: [PATCH] mm: nobootmem: Correct alloc

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Message-Id: <20120425.191543.1155744882785458282.davem@davemloft.net>
Date:	Wed, 25 Apr 2012 19:15:43 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	yinghai@...nel.org
Cc:	linux-kernel@...r.kernel.org, tj@...nel.org,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH] mm: nobootmem: Correct alloc_bootmem semantics.

From: Yinghai Lu <yinghai@...nel.org>
Date: Wed, 25 Apr 2012 16:14:00 -0700

> On Wed, Apr 25, 2012 at 4:00 PM, David Miller <davem@...emloft.net> wrote:
>> From: Yinghai Lu <yinghai@...nel.org>
>> Date: Wed, 25 Apr 2012 15:46:42 -0700
>>
>>> On Wed, Apr 25, 2012 at 1:10 PM, David Miller <davem@...emloft.net> wrote:
>>>> @@ -298,13 +298,19 @@ void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
>>>>        if (WARN_ON_ONCE(slab_is_available()))
>>>>                return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
>>>>
>>>> +again:
>>>>        ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
>>>>                                         goal, -1ULL);
>>>>        if (ptr)
>>>>                return ptr;
>>>
>>> If you want to be consistent to bootmem version.
>>>
>>> again label should be here instead.
>>
>> It is merely an artifact of implementation that the bootmem version
>> doesn't try to respect the given node if the goal cannot be satisfied,
>> and in fact I would classify that as a bug that needs to be fixed.
>>
>> Therefore, I believe the bootmem case is what needs to be adjusted
>> instead.
> 
> Yes.
> 
> Acked-by: Yinghai Lu <yinghai@...nel.org>
> 
> Linus will pick it directly or through your sparc nobootmem conversion?

I was hoping Linus would take this directly.
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