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

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Message-ID: <CAE9FiQV1=ROUFMbtvsCr+xbrFphLspesZ0vB+UTHC-fRY7JKbQ@mail.gmail.com>
Date:	Wed, 25 Apr 2012 16:14:00 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	David Miller <davem@...emloft.net>
Cc:	linux-kernel@...r.kernel.org, tj@...nel.org,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH] mm: nobootmem: Correct alloc_bootmem semantics.

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?

Yinghai
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