linux-kernel - Re: [patch 2/3] add new macros to make percpu readmostly section correctly align

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Message-ID: <4D05EBA4.60202@gmail.com>
Date:	Mon, 13 Dec 2010 10:47:16 +0100
From:	Tejun Heo <htejun@...il.com>
To:	Shaohua Li <shaohua.li@...el.com>
CC:	lkml <linux-kernel@...r.kernel.org>,
	"hpa@...or.com" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"sam@...nborg.org" <sam@...nborg.org>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>
Subject: Re: [patch 2/3] add new macros to make percpu readmostly section
 correctly align

Hello,

On 12/13/2010 01:41 AM, Shaohua Li wrote:
>> Why add another set of macros?  Can't you just make the default one
>> aligned?
> how to do it without changing all arch code? There isn't cache line size
> macro for all arch which could be used in vmlinux.lds.h, IIRC.

Can't we get around that with some ifdefferies?  And even if we'll
have to change lds on every arch, I think we better do it that way.
It's not like the problem exists only on x86, right?

Thanks.

-- 
tejun
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