netdev - Re: [RFC] [PATCH] Don't run __qdisc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 25 Jul 2009 13:53:09 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Krishna Kumar2 <krkumar2@...ibm.com>, davem@...emloft.net,
	netdev@...r.kernel.org
Subject: Re: [RFC] [PATCH] Don't run __qdisc_run() on a stopped TX queue

On Sat, Jul 25, 2009 at 07:12:07PM +0800, Herbert Xu wrote:
> On Sat, Jul 25, 2009 at 01:04:09PM +0200, Jarek Poplawski wrote:
> > 
> > It would be nice to establish what difference is made by each part of
> > this patch. The check for stopped queue before each skb xmit was done
> > earlier too, so it's not exactly multiqueue penalization.
> 
> No, but getting into qdisc_restart when we know that the queue is
> stopped is just silly.  The only reason that is done right now is
> because of the pathological case where a packet on qdisc X maps to
> hardware queue Y.  This is something which almost nobody uses and
> yet it penalises everybody.

Hmm... I agree with you 100%! (I'd only like to see more digits... ;-)

Cheers,
Jarek P.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html