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Date: Fri, 25 Nov 2011 14:56:11 -0600
From: Mark Felder <feld@feld.me>
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Subject: Re: zfs i/o hangs on 9-PRERELEASE
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On 25.11.2011 13:39, Freddie Cash wrote:
>
> There's a lot of uma_* stuff in there.  Just curious, what's the 
> following
> sysctl set to:
>
> vfs.zfs.zio.use_uma
>
> Back in the 8.x days, it was recommended to set it to 0 due to bugs:
> 
> http://lists.freebsd.org/pipermail/freebsd-stable/2010-June/057162.html
>
> No idea if this is still the case or not, but you may want to try 
> toggling
> that sysctl and see if it makes a difference.


Confirmed mine is set to 0.