linux-kernel - Re: [PATCH v2 08/23] mm/memblock: Add memblock memory allocation apis

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Message-ID: <20131205165325.GA24062@mtj.dyndns.org>
Date:	Thu, 5 Dec 2013 11:53:25 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Grygorii Strashko <grygorii.strashko@...com>
Cc:	Santosh Shilimkar <santosh.shilimkar@...com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mm@...ck.org, Yinghai Lu <yinghai@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 08/23] mm/memblock: Add memblock memory allocation apis

Hello,

On Thu, Dec 05, 2013 at 06:35:00PM +0200, Grygorii Strashko wrote:
> >> +#define memblock_virt_alloc_align(x, align) \
> >> +	memblock_virt_alloc_try_nid(x, align, BOOTMEM_LOW_LIMIT, \
> >> +				     BOOTMEM_ALLOC_ACCESSIBLE, MAX_NUMNODES)
> > 
> > Also, do we really need this align variant separate when the caller
> > can simply specify 0 for the default?
> 
> Unfortunately Yes. 
> We need it to keep compatibility with bootmem/nobootmem
> which don't handle 0 as default align value.

Hmm... why wouldn't just interpreting 0 to SMP_CACHE_BYTES in the
memblock_virt*() function work?

Thanks.

-- 
tejun
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