Subject: Re: NFS and kernel 2.6.x
From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Jamie Lokier <jamie@shareable.org>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <20040416193914.GA25792@mail.shareable.org>
References: <20040416011401.GD18329@widomaker.com>
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Message-Id: <1082241169.3930.14.camel@lade.trondhjem.org>
Mime-Version: 1.0
Date: Sat, 17 Apr 2004 15:32:50 -0700
Sender: linux-kernel-owner@vger.kernel.org
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On Fri, 2004-04-16 at 12:39, Jamie Lokier wrote:

> > That's something that is dead easy to do...
> 
> I'll test a patch for 2.6.5 if you provide one.

Here you go...

With this patch
        - the major timeout is of fixed length "timeo<<retrans", and the
        clock starts at the first attempt to send the packet.
        - If a major timeout occurs, we now reset the RTT estimator so
        as to "slow start" when the server becomes available again.

For the moment it does use the timeo + retrans values, because the
former is in fact wanted in order to initialize the RTT estimator.
However, it no longer uses the count of the number of actual
retransmissions in order to determine whether or not a major timeout
occurred.

Cheers,
  Trond


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