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Re: Hard freeze with 2.6.10-rc3 and QoS, worked fine with 2.6.9

To: Stephen Hemminger <shemminger@xxxxxxxx>
Subject: Re: Hard freeze with 2.6.10-rc3 and QoS, worked fine with 2.6.9
From: Patrick McHardy <kaber@xxxxxxxxx>
Date: Wed, 08 Dec 2004 23:26:46 +0100
Cc: netdev@xxxxxxxxxxx
In-reply-to: <20041208140707.61c2237c@dxpl.pdx.osdl.net>
References: <1102380430.6103.6.camel@buffy> <20041206224441.628e7885.akpm@osdl.org> <1102422544.1088.98.camel@jzny.localdomain> <41B5E188.5050800@trash.net> <20041207170748.GF1371@postel.suug.ch> <41B5E722.2080600@trash.net> <20041207213053.6bb602c1.davem@davemloft.net> <1102507470.1051.27.camel@jzny.localdomain> <41B73263.4040706@trash.net> <20041208113014.3dcad5f5@dxpl.pdx.osdl.net> <41B77072.2070200@trash.net> <20041208140707.61c2237c@dxpl.pdx.osdl.net>
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Stephen Hemminger wrote:

I think the problem was a missing poke (qdisc_restart) in the netem timer
routine, it probably worked earlier for me on other hardware because I was
using different hardware that was waking up and checking tx in response
to received packets.


Yes, that seems likely. Since netem doesn't account for the delayed packets
in sch->q.qlen it will only be woken up while non-delayed packets are queued.


Regards
Patrick


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