netdev - Re: [RFC] IP

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Message-ID: <20070810140214.GA10331@one.firstfloor.org>
Date:	Fri, 10 Aug 2007 16:02:14 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	jamal <hadi@...erus.ca>
Cc:	netdev@...r.kernel.org, Andi Kleen <andi@...stfloor.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [RFC] IP_RECVERRC

On Fri, Aug 10, 2007 at 09:35:12AM -0400, jamal wrote:
> 
> It seems there are a lot of dumbass apps (latest i have found is iperf
> when analyzing batching results) out there whose performance is affected
> if they dont set IP_RECVERR. 

Affected in what way? 

> If you set that option though you end up getting all these skbs back

IP_RECVERR just delivers ICMPs. Do you mean those with "all these skbs" ?

> to the app which i see as unnecessary work if i am uninterested. I would
> like to not do a recvmsg to find out what those messages are - rather
> just receiving any errors back.
> My proposal is to add another option which is mutually exclusive with
> IP_RECVERR that allows for errors only.

What ICMPs do you not want? 

-Andi
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