netdev - Re: [PATCH 0/1] RFC: poll/select performance on datagram sockets

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Message-Id: <20101029.134058.246543591.davem@davemloft.net>
Date:	Fri, 29 Oct 2010 13:40:58 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jj@...osbits.net
Cc:	eric.dumazet@...il.com, alban.crequy@...labora.co.uk,
	shemminger@...tta.com, gorcunov@...nvz.org, adobriyan@...il.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	pauli.nieminen@...labora.co.uk, rweikusat@...gmbh.com
Subject: Re: [PATCH 0/1] RFC: poll/select performance on datagram sockets

From: Jesper Juhl <jj@...osbits.net>
Date: Fri, 29 Oct 2010 22:20:12 +0200 (CEST)

> Sorry to intrude out of the blue without really understanding the kernel 
> side of most of the code in question, but if there's a performance 
> regression for applications using poll() shouldn't we address that so we 
> get back to the prior performance level rather than requireing all 
> userspace apps to switch to epoll() ??

For such a pathological program like Alban's test case, I say
absolutely not.
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