netdev - Re: [RFC PATCH] [TCP]: Reworked recovery's TCPCB

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Date:	Tue, 06 Mar 2007 13:47:26 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	baruch@...en.org
Cc:	ilpo.jarvinen@...sinki.fi, netdev@...r.kernel.org
Subject: Re: [RFC PATCH] [TCP]: Reworked recovery's TCPCB_LOST marking
 functions

From: Baruch Even <baruch@...en.org>
Date: Tue, 6 Mar 2007 21:42:59 +0200

> * Ilpo J?rvinen <ilpo.jarvinen@...sinki.fi> [070306 14:52]:
> > +		newtp->highest_sack = treq->snt_isn + 1;
> 
> That's the only initialization that you have for highest_sack, I think
> that you should initialize it when a loss is detected to the start_seq
> of the first packet that wasn't acked.

He also sets it in tcp_sacktag_write_queue() like this:

+
+				if (after(TCP_SKB_CB(skb)->seq,
+				    tp->highest_sack))
+					tp->highest_sack = TCP_SKB_CB(skb)->seq;
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