linux-kernel - Re: bad networking related lag in v2.6.22-rc2

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Message-ID: <4654269C.4040809@trash.net>
Date:	Wed, 23 May 2007 13:33:48 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	Ingo Molnar <mingo@...e.hu>, Anant Nitya <kernel@...chanda.info>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: bad networking related lag in v2.6.22-rc2

Herbert Xu wrote:
> On Wed, May 23, 2007 at 12:56:04PM +0200, Patrick McHardy wrote:
> 
>>Looking at the recent changes to __qdisc_run, this indeed seems
>>to be the case, when the qdisc is throttled and has packets queued
>>we return a value != 0, causing __qdisc_run to loop until all
>>packets have been sent, which may be a long time.
> 
> 
> Good catch! I was obviously half awake at the time :)
> 
> We could also fix it this way:


Yes, that looks better, thanks.
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