netdev - RE: problem with noop and pfifo

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Message-ID: <1326982398.2249.14.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Thu, 19 Jan 2012 15:13:18 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hemant-vilas RAMDASI <hemant.ramdasi@...ricsson.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"netdev-owner@...r.kernel.org" <netdev-owner@...r.kernel.org>
Subject: RE: problem with noop and pfifo_fast Qdisc switching

Le jeudi 19 janvier 2012 à 14:44 +0100, Hemant-vilas RAMDASI a écrit :

> Yes, I mean machine going to suspend..
> The problem with this message is that it can be retried only a couple of time.
> We saw a code where dev_deactivate is called which changes the Qdisc to 'noop'. 
> I hope it will restore it in dev_activate() again when machine resumes. We are checking this.
> Is there any race between when dev_queue_xmit is called and dev_activate is still not complete?
> 

No race, just dev_queue_xmit() returns an error ;)

There is no 'queue' at this level.

IP has sort of a (small) queue because of ARP resolution.


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