netdev - Re: [PATCH] Discard tcp out-of-order queue if system limit is reached

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Message-ID: <4804C296.6000203@firstfloor.org>
Date:	Tue, 15 Apr 2008 16:58:30 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Vitaliy Gusev <vgusev@...nvz.org>
CC:	David Miller <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>, netdev@...r.kernel.org
Subject: Re: [PATCH] Discard tcp out-of-order queue if system limit is reached

Vitaliy Gusev wrote:
> Hello!
> 
> tcp_prune_queue() doesn't prune an out-of-order queue if socket
> is under rcvbuf. However even if socket is under rcvbuf but system-wide limit is
> reached then skb cannot be queued. It can lead to deadlock situation as any skb that
> fills sequence hole is dropped.
> So discard out-of-order queue if system-wide limit is reached.

Thanks. At least the description makes much more sense than before now.

Acked-by: Andi Kleen <andi@...stfloor.org>

-Andi

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