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Date: Wed, 29 Aug 2007 16:31:36 -0700 From: Rick Jones <rick.jones2@...com> To: David Miller <davem@...emloft.net> Cc: ian.mcdonald@...di.co.nz, netdev@...r.kernel.org, ilpo.jarvinen@...sinki.fi Subject: Re: [PATCH] make _minimum_ TCP retransmission timeout configurable David Miller wrote: > From: Rick Jones <rick.jones2@...com> >>The trace I've been sent shows clean RTTs ranging from ~200 milliseconds >>to ~7000 milliseconds. > > > Thanks for the info. > > It's pretty easy to generate examples where we might have some sockets > talking over interfaces on such a network and others which are not. > Therefore, if we do this, a per-route metric is probably the best bet. FWIW, the places where I've seen this come-up thusfar are where we have a sort of "gateway" or front-end system which is connected on one side to the cellphone network with the bad delays, and on the other side is connected to an internal network where actual losses leading to RTO's are epsilon. Certainly something which could make a per-route decision would work there and probably quite well, though a simple sysctl does seem to be sufficient and would touch fewer places. Do you think it is still worthwhile for me to rework the initial patch to use CTL_UNNUMBERED? rick - 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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