netdev - Re: Add PGM protocol support to the IP stack

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Message-ID: <alpine.DEB.2.00.1003301311070.26463@router.home>
Date:	Tue, 30 Mar 2010 13:12:04 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Andi Kleen <andi@...stfloor.org>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Add PGM protocol support to the IP stack

On Mon, 29 Mar 2010, H. Peter Anvin wrote:

> On 03/22/2010 11:53 AM, Andi Kleen wrote:
> >
> > There's just no portable atomic64_t. Ok maybe you can use the socket lock
> > to synchronize all the counts if they are only per socket.
> >
>
> In 2.6.34 there is (although some arches which could support it natively
> don't as of yet... but that's fixable.)  See lib/atomic64.c.

There are also the 64bit thiscpu operations that were merged in 2.6.33.
They do the right thing if the arch does not provide operations.


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