netdev - Re: [PATCH] NET: Multiqueue network device support.

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Date:	Fri, 08 Jun 2007 07:34:57 -0400
From:	jamal <hadi@...erus.ca>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Sridhar Samudrala <sri@...ibm.com>,
	David Miller <davem@...emloft.net>, auke-jan.h.kok@...el.com,
	jeff@...zik.org, kaber@...sh.net, peter.p.waskiewicz.jr@...el.com,
	netdev@...r.kernel.org, jesse.brandeburg@...el.com
Subject: Re: [PATCH] NET: Multiqueue network device support.

On Fri, 2007-08-06 at 20:39 +1000, Herbert Xu wrote:

> It would guard against the poll routine which would acquire this lock
> when cleaning the TX ring.

Ok, then i suppose we can conclude it is a bug on e1000 (holds tx_lock
on tx side and adapter queue lock on rx). Adding that lock will
certainly bring down the performance numbers on a send/recv profile.
The bizare thing is things run just fine even under the heavy tx/rx
traffic i was testing under. I guess i didnt hit hard enough.

cheers,
jamal

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