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Message-ID: <1370441849.24311.256.camel@edumazet-glaptop>
Subject: Re: [PATCH v9 net-next 5/7] net: simple poll/select low latency
 socket poll
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Cc: David Miller <davem@davemloft.net>, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org, Jesse Brandeburg <jesse.brandeburg@intel.com>,
        Don Skidmore <donald.c.skidmore@intel.com>,
        e1000-devel@lists.sourceforge.net,
        Willem de Bruijn <willemb@google.com>,
        Ben Hutchings <bhutchings@solarflare.com>,
        Andi Kleen <andi@firstfloor.org>, HPA <hpa@zytor.com>,
        Eilon Greenstien <eilong@broadcom.com>,
        Or Gerlitz <or.gerlitz@gmail.com>, Amir Vadai <amirv@mellanox.com>,
        Eliezer Tamir <eliezer@tamir.org.il>
Date: Wed, 05 Jun 2013 07:17:29 -0700
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On Wed, 2013-06-05 at 06:56 -0700, Eric Dumazet wrote:

> This looks quite easy, by adding in include/uapi/asm-generic/poll.h
> 
> #define POLL_LL 0x8000
> 
> And do the sk_poll_ll() call only if flag is set.
> 
> I do not think we have to support select(), as its legacy interface, and
> people wanting ll should really use epoll() or poll().

Alternatively, add a per socket flag to enable/disable ll

This global enable assumes the application owns the host anyway.



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