netdev - Re: [patch 14/14] e1000: No-delay link detection at interface up

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Message-ID: <4582B2EA.9010501@garzik.org>
Date:	Fri, 15 Dec 2006 09:36:26 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Arjan van de Ven <arjan@...ux.intel.com>
CC:	netdev@...r.kernel.org
Subject: Re: [patch 14/14] e1000: No-delay link detection at interface up

Arjan van de Ven wrote:
> Subject: e1000: No-delay link detection at interface up
> From: Jesse Brandeburg <jesse.brandeburg@...el.com>
> 
> Currently after an interface up, the link state is detected 2 seconds later
> when the first watchdog timer runs. This patch changes that by triggering
> the hardware to generate a link-change interrupt from the up() function
> instead. This has the result that the link state gets detected immediately
> and without races. This has the potential to speed up booting since a normal
> distribution boot process waits for a link before DHCP is attempted.
> 
> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
> Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>
> Signed-off-by: Arjan van de Ven <arjan@...ux.intel.com>

ACK, though you can also just schedule the timer to run immediately, or 
even run it yourself inside spin_lock_bh()

	Jeff



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