linux-kernel - Re: Why Semaphore Hardware-Dependent?

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Date:	Fri, 15 Sep 2006 01:38:15 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Nick Piggin <nickpiggin@...oo.com.au>
CC:	David Howells <dhowells@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Dong Feng <middle.fengdong@...il.com>, ak@...e.de,
	Paul Mackerras <paulus@...ba.org>,
	Christoph Lameter <clameter@....com>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: Why Semaphore Hardware-Dependent?

Ahh, my mistake :)

Nick Piggin wrote:

> It is actually larger here.
> 
>    text    data     bss     dec     hex filename
>     970       0       0     970     3ca lib/rwsem-spinlock.o
>     576       0       0     576     240 kernel/spinlock.o
                                            ^^ should be:
        35       0       0      35      23 kernel/rwsem.o

>   =1546
> 
>    text    data     bss     dec     hex filename
>    1310       0       0    1310     51e lib/rwsem.o
>     193       0       0     193      c1 kernel/rwsem.o
>   =1503

Well, it is still larger than the atomic_inc_return variant
after my patch.

-- 
SUSE Labs, Novell Inc.
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