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Date:      Tue, 12 Oct 2010 17:40:21 +0300
From:      Andriy Gapon <avg@icyb.net.ua>
To:        Jeremy Chadwick <freebsd@jdc.parodius.com>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: Locked up processes after upgrade to ZFS v15
Message-ID:  <4CB47355.1050109@icyb.net.ua>
In-Reply-To: <20101012143559.GA34396@icarus.home.lan>
References:  <CF901B53-657E-49FC-A43B-27BC7D49F7A7@free.de> <4CB17983.3020907@icyb.net.ua> <20101011151508.GA10917@icarus.home.lan> <4CB32C75.2060000@icyb.net.ua> <20101011183707.GA13925@icarus.home.lan> <4CB3870F.7070107@icyb.net.ua> <20101012100709.GA29861@icarus.home.lan> <4CB4429C.9040109@icyb.net.ua> <20101012130245.GA32584@icarus.home.lan> <4CB46CE9.20905@icyb.net.ua> <20101012143559.GA34396@icarus.home.lan>

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on 12/10/2010 17:35 Jeremy Chadwick said the following:
> Nope, but since it's a single-CPU system I can probably enable it
> safely (I thought I remember something about CTF not working right on
> SMP systems...).  Give me a little while to figure out how to get it

Never heard about such issue and never hit them on my two-core systems.

> working, assuming you're willing to step me through what I need to do to
> simulate the lock condition.  :-)

Enabling DTrace is really easy:
http://wiki.freebsd.org/DTrace

I would appreciate if you could enable it on your test system.

-- 
Andriy Gapon



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