linux-kernel - Re: [PATCH v4 net-next] net: poll/select low latency socket support

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Message-Id: <20130625.163614.1867701213174099145.davem@davemloft.net>
Date:	Tue, 25 Jun 2013 16:36:14 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eliezer.tamir@...ux.intel.com
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	jesse.brandeburg@...el.com, donald.c.skidmore@...el.com,
	e1000-devel@...ts.sourceforge.net, willemb@...gle.com,
	erdnetdev@...il.com, bhutchings@...arflare.com,
	andi@...stfloor.org, hpa@...or.com, eilong@...adcom.com,
	or.gerlitz@...il.com, amirv@...lanox.com, alexr@...lanox.com,
	eliezer@...ir.org.il
Subject: Re: [PATCH v4 net-next] net: poll/select low latency socket support

From: Eliezer Tamir <eliezer.tamir@...ux.intel.com>
Date: Mon, 24 Jun 2013 10:28:03 +0300

> select/poll busy-poll support.
> 
> Split sysctl value into two separate ones, one for read and one for poll.
> updated Documentation/sysctl/net.txt
> 
> Add a new poll flag POLL_LL. When this flag is set, sock_poll will call
> sk_poll_ll if possible. sock_poll sets this flag in its return value
> to indicate to select/poll when a socket that can busy poll is found.
> 
> When poll/select have nothing to report, call the low-level
> sock_poll again until we are out of time or we find something.
> 
> Once the system call finds something, it stops setting POLL_LL, so it can
> return the result to the user ASAP.
> 
> Signed-off-by: Eliezer Tamir <eliezer.tamir@...ux.intel.com>

Looks good, applied, thanks!
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