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List:       freebsd-hackers
Subject:    Re: gstat going negative?
From:       Kris Kennaway <kris () obsecurity ! org>
Date:       2006-05-30 18:47:57
Message-ID: 20060530184757.GA28326 () xor ! obsecurity ! org
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On Tue, May 30, 2006 at 11:04:35AM -0400, David Gilbert wrote:
> I've large array that winds up providing 1TB of disk (according to df
> -h :) to a bunch of nfs users.  On the array machine, I'm using
> gmirror and gconcat to build the array and right now I'm running dump
> on the array.
> 
> I've got a gstat running and one curious thing is that gstat keeps
> reporting 2^32-1 as the value for l(Q) (obviously, spelt out in
> numbers) ... as if l(Q) is actually coming back as -1.
> 
> Odd?

SMP race, you can increase the value of kern.geom.collectstats to make
the stats collection atomic at the expense of some (probably
negligible) performance.

Kris

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