On Thu, Jan 21, 2016 at 08:03:25AM -0700, alan somers wrote: > On Thu, Jan 21, 2016 at 4:38 AM, Slawa Olhovchenkov <s...@zxy.spb.ru> wrote: > > On Thu, Jan 21, 2016 at 01:34:57AM +0200, Andriy Gapon wrote: > > > >> On 20/01/2016 22:03, Alan Somers wrote: > >> > On Wed, Jan 20, 2016 at 2:20 AM, Andriy Gapon <a...@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? > >> > > >> > 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. > >> > >> I think that we all want all the bugs to go way. One way to remove bugs > >> is to > >> remove (disable) code that contains bugs. That way the perfect bug-free > >> software is clearly achievable :-) Unfortunately, that technique is not > >> always > >> welcomed. > >> > >> P.S. > >> I think that the real problem here is that a method of a geom must never > >> drop > >> topology_lock. In other words, the GEOM management code (like g_xxx() > >> stuff in > >> geom_subr.c) expects that a topology can not change underneath it. But > >> zvol_geom_access() clearly breaks that contract. > > > > May be same cause problem with swap on zvol (don't test on latest > > -stable)? > > I'm not familiar with that problem. Is there a PR?
I am find PR 199189. My expirense slightly different: VirtualBox VM with test install (384M RAM) hang, not crashed, just infinite wait somewhere. Tested on 10.1. _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
