netdev - Re: SACK scoreboard

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Date:	Wed, 09 Jan 2008 03:25:05 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	David Miller <davem@...emloft.net>
Cc:	jheffner@....edu, ilpo.jarvinen@...sinki.fi,
	lachlan.andrew@...il.com, netdev@...r.kernel.org,
	quetchen@...tech.edu
Subject: Re: SACK scoreboard

David Miller <davem@...emloft.net> writes:
>
> The big problem is that recovery from even a single packet loss in a
> window makes us run kfree_skb() for a all the packets in a full
> window's worth of data when recovery completes.

Why exactly is it a problem to free them all at once? Are you worried
about kernel preemption latencies?

-Andi
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