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Date: Fri, 10 Aug 2012 17:16:11 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: David Miller <davem@...emloft.net> Cc: netdev@...r.kernel.org, lp2s1h@...il.com Subject: Re: [PATCH] codel: refine one condition to avoid a nul rec_inv_sqrt On Mon, 2012-07-30 at 14:54 -0700, David Miller wrote: > From: Eric Dumazet <eric.dumazet@...il.com> > Date: Mon, 30 Jul 2012 08:52:21 +0200 > > > From: Eric Dumazet <edumazet@...gle.com> > > > > One condition before codel_Newton_step() was not good if > > we never left the dropping state for a flow. As a result > > rec_inv_sqrt was 0, instead of the ~0 initial value. > > > > codel control law was then set to a very aggressive mode, dropping > > many packets before reaching 'target' and recovering from this problem. > > > > To keep codel_vars_init() as efficient as possible, refine > > the condition to make sure rec_inv_sqrt initial value is correct > > > > Many thanks to Anton Mich for discovering the issue and suggesting > > a fix. > > > > Reported-by: Anton Mich <lp2s1h@...il.com> > > Signed-off-by: Eric Dumazet <edumazet@...gle.com> > > Applied and queued up for -stable. Hi David, I think this patch got lost somehow ? Thanks -- 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
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