Re: [PATCH 1/2]: powerpc/cell spidernet bottom half

On Wed, Aug 16, 2006 at 01:46:40PM -0700, David Miller wrote:

From: Jeff Garzik <redacted>
Date: Wed, 16 Aug 2006 16:34:31 -0400

quoted

Linas Vepstas wrote:

quoted

I was under the impression that NAPI was for the receive side only.

That depends on the driver implementation.

What Jeff is trying to say is that TX reclaim can occur in
the NAPI poll routine, and in fact this is what the vast
majority of NAPI drivers do.

I'll experiment with this.  When doing, say, an ftp, there are 
enough TCP ack packets coming back to have NAPI netdev->poll 
be called frequently enough? 

implied.  In fact, I get the impression that spidernet is limited
in some way and that's where all the strange approaches are coming
from :)

Hmm. Or maybe I'm just getting old. Once upon a time, low watermarks
were considered the "best" way of doing anything; never occurred to me
it would be considered "strange".  Based on my probably obsolete idea
of what constitutes "slick hardware", I was actually impressed by what
the spidernet could do.

Aside from cleaning up the transmit ring in the receive poll loop,
what would be the not-so-strange way of doing things?

--linas