linux-kernel - Re: Is module refcounting racy?

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Message-ID: <1270534763.9013.55.camel@edumazet-laptop>
Date:	Tue, 06 Apr 2010 08:19:23 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Nick Piggin <npiggin@...e.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Nick Piggin <npiggin@...il.com>, linux-kernel@...r.kernel.org,
	Jon Masters <jonathan@...masters.org>
Subject: Re: Is module refcounting racy?

Le mardi 06 avril 2010 à 15:05 +1000, Nick Piggin a écrit :

> Also if anyone else is looking at a way to do _really_ scalable
> refcounting elsewhere, this could be a good template (I certainly looked
> here first when trying to get ideas for vfsmount refcounting).

Yes, nice trick Nick, I was thinking about it for network code :)

Acked-by: Eric Dumazet <eric.dumazet@...il.com>

I confess the smp_wmb() in module_put() bothered me a bit until I saw it
was only a barrier() on X86 (if !CONFIG_X86_OOSTORE)



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