netdev - Re: [RFC] net: napi fix

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Message-ID: <18282.15185.592112.550961@robur.slu.se>
Date:	Thu, 20 Dec 2007 10:52:17 +0100
From:	Robert Olsson <Robert.Olsson@...a.slu.se>
To:	David Miller <davem@...emloft.net>
Cc:	gallatin@...i.com, joonwpark81@...il.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, jgarzik@...ox.com,
	shemminger@...ux-foundation.org
Subject: Re: [RFC] net: napi fix


David Miller writes:

 > > Is the netif_running() check even required?
 > 
 > No, it is not.
 > 
 > When a device is brought down, one of the first things
 > that happens is that we wait for all pending NAPI polls
 > to complete, then block any new polls from starting.

 Hello!

 Yes but the reason was not to wait for all pending polls to
 complete so a server/router could be rebooted even under high-
 load and DOS. We've experienced some nasty problems with this.

 Cheers.
					--ro
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