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Date: Tue, 1 May 2007 12:49:35 -0400 From: Benjamin LaHaise <bcrl@...ck.org> To: Evgeniy Polyakov <johnpol@....mipt.ru> Cc: David Miller <davem@...emloft.net>, netdev@...r.kernel.org Subject: Re: [PATCH] TCP FIN gets dropped prematurely, results in ack storm On Tue, May 01, 2007 at 08:20:50PM +0400, Evgeniy Polyakov wrote: > > http://www.kvack.org/~bcrl/ack-storm.log . As near as I can tell, a > > similar effect can occur between two Linux boxes if the right packets get > > reordered/dropped during connection teardown. > > Could you archive 24Mb file or cut more precise bits out of it? The interesting bits are the first 10 lines. > According to your patch, several packets with fin bit might be sent, > including one with data. If another host does not receive fin > retransmit, then that logic is broken, and it can not be fixed by > duplicating fins, I would even say, that remote box should drop second > packet with fin, while it can carry data, which will break higher > connection logic. The FIN hasn't been ack'd by the other side, though and yet Linux is no longer transmitting packets with it sent. Read the beginning of the trace. -ben -- "Time is of no importance, Mr. President, only life is important." Don't Email: <zyntrop@...ck.org>. - 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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