linux-kernel - Re: [PATCH 2/4]: powerpc/cell spidernet low watermark patch.

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Message-Id: <1155962022.5803.68.camel@localhost.localdomain>
Date:	Sat, 19 Aug 2006 14:33:42 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linas Vepstas <linas@...tin.ibm.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	Jens.Osterkamp@...ibm.com, jklewis@...ibm.com, arnd@...db.de
Subject: Re: [PATCH 2/4]: powerpc/cell spidernet low watermark patch.

On Fri, 2006-08-18 at 18:45 -0500, Linas Vepstas wrote:
> On Fri, Aug 18, 2006 at 06:29:42PM -0500, linas wrote:
> > 
> > I don't understand what you are saying. If I call the transmit 
> > queue cleanup code from the poll() routine, nothing hapens, 
> > because the kernel does not call the poll() routine often 
> > enough. I've stated this several times.  
> 
> OK, Arnd gave me a clue stick. I need to call the (misnamed)
> netif_rx_schedule() from the tx interrupt in order to get 
> this to work. That makes sense, and its easy, I'll send the 
> revised patch.. well, not tonight, but shortly.

You might not want to call it all the time though... You need some
interrupt mitigation and thus a timer that calls netif_rx_schedule()
might be of some use still...

Ben.


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