Date: Wed, 20 Jan 2016 13:03:24 -0700 From: Alan Somers <asomers@freebsd.org> To: Andriy Gapon <avg@freebsd.org> Cc: "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org> Subject: Re: svn commit: r294329 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys Message-ID: <CAOtMX2gs37OnLMXE4zCduZF94%2B5z-TgPW%2Bqg8K8BweauLCRgDQ@mail.gmail.com> In-Reply-To: <569F516D.80303@FreeBSD.org> References: <201601191700.u0JH0P6k061610@repo.freebsd.org> <569E6DA0.9010300@pix.net> <CAOtMX2idrWOpWbkYxPFn3yur8w-vgfBryhT4_0yiBvg10sWWRA@mail.gmail.com> <569F516D.80303@FreeBSD.org>
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On Wed, Jan 20, 2016 at 2:20 AM, Andriy Gapon <avg@freebsd.org> wrote: > On 19/01/2016 19:20, Alan Somers wrote: >> The thing is, it never really worked in the first place. Panics and >> deadlocks are so frequent that I don't think the feature was usable >> for anybody. > > The feature is perfectly usable for me. I have never run into the problems that > you describe. Why not fix the real bugs that you've run into? > > -- > Andriy Gapon Spectra Logic and iXSystems both experienced many problems with this. The worst is a deadlock that can be triggered simply by pulling a drive from a redundant pool when there exists a zvol anywhere in the system (see https://reviews.freebsd.org/D4998 for a quick way to reproduce). Fixing it correctly would likely require far more time than I have available. I just want the bugs to go away. See that same code review for a change to make the feature optional. -Alan
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