Message-ID: <1381883311.2045.87.camel@edumazet-glaptop.roam.corp.google.com>
Subject: Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: =?ISO-8859-1?Q?S=E9bastien_Dugu=E9?= <sebastien.dugue@bull.net>,
        Neil Horman <nhorman@tuxdriver.com>, linux-kernel@vger.kernel.org,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org
Date: Tue, 15 Oct 2013 17:28:31 -0700
In-Reply-To: <20131015160236.GG2592@two.firstfloor.org>
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On Tue, 2013-10-15 at 18:02 +0200, Andi Kleen wrote:
> > I get the csum_partial() if disabling prequeue.
> 
> At least in the ipoib case i would consider that a misconfiguration.

There is nothing you can do, if application is not blocked on recv(),
but using poll()/epoll()/select(), prequeue is not used at all.

In this case, we need to csum_partial() frame before sending an ACK,
don't you think ? ;)


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