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Date:      Fri, 12 Mar 2010 19:41:49 -0500
From:      Ed Maste <emaste@freebsd.org>
Cc:        freebsd-scsi@freebsd.org
Subject:   Re: How is supposed to be protected the units list?
Message-ID:  <20100313004149.GA94041@sandvine.com>
In-Reply-To: <4B9A93AC.9020000@feral.com>
References:  <3bbf2fe11003031532u2207eb55h19c3a045215a7d84@mail.gmail.com> <4B8EF336.80107@feral.com> <3bbf2fe11003031547kd5f7314t3d83b2bde06c1c2f@mail.gmail.com> <4B8EF990.5030407@feral.com> <3bbf2fe11003031607wa3727b5ke89bc2a909d4d6a6@mail.gmail.com> <4B901419.8060800@feral.com> <3bbf2fe11003041737p30690522ya81e1b8f4bd6bbf9@mail.gmail.com> <3bbf2fe11003120601y3c403a1ct50f9fc6c1f0903bf@mail.gmail.com> <4B9A91DA.7030107@FreeBSD.org> <4B9A93AC.9020000@feral.com>

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On Fri, Mar 12, 2010 at 11:19:08AM -0800, Matthew Jacob wrote:

> That's a fair comment. There is at least one case where this additional 
> lock has helped. It probably needs rethinking a little later, but for 
> now it does seem to help people.

Right, the change is an improvement over the status quo; we were
experiencing an easily reproducible panic from this issue that is solved
by this change.  We can always change it again if a more optimal
soultion is proposed.

Thanks,
Ed


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