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

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Message-ID: <1292460904.2323.466.camel@sli10-conroe>
Date:	Thu, 16 Dec 2010 08:55:04 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Tejun Heo <htejun@...il.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

On Wed, 2010-12-15 at 22:49 +0800, Tejun Heo wrote:
> Hello,
> 
> On 12/15/2010 03:08 PM, Tejun Heo wrote:
> >> +#ifdef INTERNODE_CACHE_BYTES
> >> +#define INTERNODE_CACHEALIGNED						\
> >> +	. = ALIGN(INTERNODE_CACHE_BYTES);
> >> +#else
> >> +#define INTERNODE_CACHEALIGNED
> >> +#endif
> > 
> > Yeah, this looks good.
> 
> Just one more thing.  If you look at various arch linker scripts,
> cache line size is always present.  After all, RW_DATA_SECTION() needs
> it.  They're different define's or sometimes hardcoded values but it
> would be nice if we can take this chance to unify them and use it for
> this too.  Would you be interested in doing that?
might not, sorry.

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