netdev - Re: [PATCH 2.6.22-rc5] TCP: Make TCP_RTO

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Message-ID: <467FD4FF.2000104@p6drad-teel.net>
Date:	Mon, 25 Jun 2007 17:45:19 +0300
From:	Siim Põder <siim@...rad-teel.net>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH 2.6.22-rc5] TCP: Make TCP_RTO_MAX a variable

Yo!

Patrick McHardy wrote:
> OBATA Noboru wrote:
>> Make TCP_RTO_MAX a variable, and allow a user to change it via a
>> new sysctl entry /proc/sys/net/ipv4/tcp_rto_max.  A user can
>> then guarantee TCP retransmission to be more controllable, say,
>> at least once per 10 seconds, by setting it to 10.  This is
>> quite helpful on failover-capable network devices, such as an
>> active-backup bonding device.  On such devices, it is desirable
>> that TCP retransmits a packet shortly after the failover, which
>> is what I would like to do with this patch.  Please see
>> Background and Problem below for rationale in detail.
> 
> Would it make sense to do this per route?

To only do it per route would reduce it's usefulness with dynamic
routing as routing daemons would probably have trouble supporting it.

Siim Põder
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