From: Steve Dickson <SteveD@RedHat.com>
Subject: Re: [PATCH] Timeouts gone wild on ia64
Date: Wed, 14 May 2003 20:34:28 -0400
Sender: nfs-admin@lists.sourceforge.net
Message-ID: <3EC2E094.4070804@RedHat.com>
References: <3EBBA1FA.3090301@RedHat.com> <shsbryauczr.fsf@charged.uio.no>
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To: Trond Myklebust <trond.myklebust@fys.uio.no>, nfs@lists.sourceforge.net
In-Reply-To: <shsbryauczr.fsf@charged.uio.no>
Errors-To: nfs-admin@lists.sourceforge.net

Hi Trond,

Trond Myklebust wrote:

>>>>>>" " == Steve Dickson <SteveD@RedHat.com> writes:
>>>>>>            
>>>>>>
>
>     > What this patch does is make the minimal Round Trip time value
>     > relative to HZ. So When HZ is greater (as in the case of ia64)
>     > the minimal value goes up.
>     >  Comments?
>
>1/30 of a second is a long time. Why that particular choice?
>
>Note: "It works" won't cut ice as that is completely a function of the
>choice of hardware.
>
I realize this but... I figured waiting a few extra ticks of time before 
timing
out was probably a good thing with respect to soft mounts to slow 
servers...
Especially  since EIO errors can be pretty disruptive...

And as I see, its a no-op with a fast (or slow) client  talking to a fast
server because the timeout will should never happen... (i.e. the waiting
thread will get the response before the time out occurs)....

SteveD.


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