From: Eric Dumazet <eric.dumazet@gmail.com>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Changli Gao <xiaosuo@gmail.com>,
Patrick McHardy <kaber@trash.net>,
"David S. Miller" <davem@davemloft.net>,
netfilter-devel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] netfilter: save the hash of the tuple in the original direction for latter use
Date: Thu, 19 Aug 2010 17:31:46 +0200 [thread overview]
Message-ID: <1282231906.2549.45.camel@edumazet-laptop> (raw)
In-Reply-To: <20100819123545.GA4428@Krystal>
Le jeudi 19 août 2010 à 08:35 -0400, Mathieu Desnoyers a écrit :
> I made sure it was available on all architectures with that patchset,
> with the intended goal to used it (cmpxchg, cmpxchg_local for 32/64-bit
> and cmpxchg64, cmpxchg64_local for 64-bit) in arch-agnostic tracer code.
>
> I added a cmpxchg emulated with irqs off for uniprocessor-only
> architectures that did not have CAS support. sparc32 has moved to a
> hashed locked scheme for its atomic operations long ago, which makes the
> full 32 bits available.
>
> So, all in all, I'd be surprised if an architecture would lack
> cmpxchg() today. It might be possible that a new architecture that just
> came in would not have taken care of deploying cmpxchg, but that should
> be easily fixable.
Thats pretty cool, thanks for clarification !
prev parent reply other threads:[~2010-08-19 15:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-17 7:16 Changli Gao
2010-08-17 8:30 ` Eric Dumazet
2010-08-17 8:46 ` Changli Gao
2010-08-17 9:01 ` Eric Dumazet
2010-08-17 9:32 ` Changli Gao
2010-08-19 3:59 ` Changli Gao
2010-08-19 12:35 ` Mathieu Desnoyers
2010-08-19 15:31 ` Eric Dumazet [this message]
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