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From: John Polstra <jdp@polstra.com>
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Date: Wed, 26 Sep 2012 09:54:18 -0700
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To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
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Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org,
	src-committers@FreeBSD.org, "Kenneth D. Merry" <ken@FreeBSD.org>,
	phk@FreeBSD.org
Subject: Re: svn commit: r240822 - head/sys/geom
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On Sep 26, 2012, at 12:20 AM, Pawel Jakub Dawidek wrote:
> We might be able to change the topology lock to LIST_FOREACH_SAFE(), as
> g_wither_provider() can only destroy current provider. This is because
> CAM own the geom and nobody should be able to mess with its provider's
> list, apart from CAM itself. So I'd need to know how CAM ensures that
> two disk_gone() cannot be called for one geom. The answer might be that
> those geoms have always only one provider, but then I cannot explain why
> we have loop there. Maybe jdp@ will remember why.

No, I'm sorry but I don't remember.  It's been a long time!

John