linux-kernel - Re: [RFC] percpu section full of holes

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Message-ID: <20150608031543.GC21465@mtj.duckdns.org>
Date:	Mon, 8 Jun 2015 12:15:43 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC] percpu section full of holes

On Mon, Jun 08, 2015 at 12:09:32PM +0900, Tejun Heo wrote:
> For things we want to pack together, I suppose our only option is
> packing them into a struct and defining access macros into it.  It's
> unfortunately clumsier but expresses the intended effect clearer to
> both readers and toolchain.

One annoying thing is that we prolly have quite a few places where
people put things which are likely to be used together close to each
other intentionally and by convention and we're now losing all that
contextual information.  I have no idea whatsoever whether the gain
from toolchain shuffling symbols around is larger or smaller than
whatever gain which can be gained from such colocations.

Thanks.

-- 
tejun
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