netdev - Re: [PATCH] tg3: ethtool phys

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Date:	Sun, 24 Feb 2008 07:42:06 +0200
From:	"Eliezer Tamir" <eliezert@...adcom.com>
To:	"David Miller" <davem@...emloft.net>
cc:	mchan@...adcom.com, shemminger@...tta.com, jgarzik@...ox.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH] tg3: ethtool phys_id default (rev2)


On Sat, 2008-02-23 at 19:52 -0800, David Miller wrote:
> From: "Michael Chan" <mchan@...adcom.com>
> Date: Fri, 22 Feb 2008 11:16:42 -0800
> 
> > On Fri, 2008-02-22 at 10:24 -0800, Stephen Hemminger wrote:
> > > When asked to blink LEDs the tg3 driver behaves when using:
> > > 	ethtool -p ethX
> > > The default value for data is zero, and other drivers interpret this
> > > as blink forever (or at least a really long time).  The tg3 driver
> > > interprets this as blink once.  All drivers should have the same
> > > behaviour.
...
> > We should do this across the board for bnx2, bnx2x, and niu as well.
> 
> Agreed.

Doesn't this mean that ethtool -p will hold the RTNL lock forever?
Is this a good idea?

For example on the Red Hat machine I have here if you do:

ethtool -p eth2 100000 &
reboot

Various things the shutdown scripts try to do will fail because of the
held RTNL lock. in the end the script dies and the machine does not
reboot.

Eliezer





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