netdev - Re: HFSC classes going out of bounds, regression in recent kernels?

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Message-ID: <4BBB5543.40607@trash.net>
Date:	Tue, 06 Apr 2010 17:37:39 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Denys Fedorysychenko <nuclearcat@...learcat.com>
CC:	netdev@...r.kernel.org, Jeff Garzik <jeff@...zik.org>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: HFSC classes going out of bounds, regression in recent kernels?

Denys Fedorysychenko wrote:
> I notice on one of my QoS machines that HFSC start going out of bandwidth 
> limits. The most terrible thing - it happens suddenly, and if i just relaunch 
> QoS script - everything will work fine.

That sounds like there's an overflow somewhere.

> I'm not sure it is not my mistake, but most probably it is a bug.
> I can't tell for sure when it is happened, last kernel was on this machine 
> 2.6.28 i guess, or maybe even older.

Looking through the recent patches in this area, my prime suspect
is the attached patch. Does reverting it make any difference?


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