Date: Fri, 12 Dec 2008 12:20:30 +0100 From: Roman Divacky <rdivacky@FreeBSD.org> To: Robert Watson <rwatson@FreeBSD.org> Cc: Kostik Belousov <kostikbel@gmail.com>, Randy Bush <randy@psg.com>, Bartosz Stec <admin@kkip.pl>, FreeBSD Current <current@FreeBSD.org> Subject: Re: panic: sleeping thread & bufwrite: buffer is not busy??? Message-ID: <20081212112030.GA74265@freebsd.org> In-Reply-To: <alpine.BSF.1.10.0812121037360.41885@fledge.watson.org> References: <4940A685.7040608@psg.com> <494216C2.7080606@kkip.pl> <20081212095238.GY2038@deviant.kiev.zoral.com.ua> <alpine.BSF.1.10.0812121037360.41885@fledge.watson.org>
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On Fri, Dec 12, 2008 at 10:38:56AM +0000, Robert Watson wrote: > On Fri, 12 Dec 2008, Kostik Belousov wrote: > > >>Unfortunately I cannot provide more debug information at this time > >>because kernel was built without debugging options. (I will rebuild it > >>if needed) However I can still provide some info: > >>- kernel panic while loading modules, just after loding ZFS module (I > >>have RAIDZ configuration) and after a couple of minutes without any > >>visible action on the screen. > >>- I have this panic with *every* build I made after 7 Dec 2008, but I > >>don't remember wchich day exactly I have experienced that for the first > >>time. > >>- For now I'm using kernel builded 7 Dec 2008 and no panic seen at all. > > > >You are mixing the issues without a reason. To claim that you problem is > >similar, you need to show the similar backtrace. The panic shown is the > >late manifestation of a problem, it is kind a catch-all for some sort of > >locking issues. > > This is the second report of weird rwlock-related panics in a week. We > should read the code on this one closely, but I can't help but notice that > it's similar to Roman's report of an rwlock-related panic. Was there a > locking/scheduling change in the last week or two in -current that could > explain these symptoms? I still have the vmcore from the crash... can it help?
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