Date: Mon, 22 Feb 2010 12:02:29 -0500 From: John Baldwin <jhb@freebsd.org> To: Attilio Rao <attilio@freebsd.org> Cc: Brandon Gooch <jamesbrandongooch@gmail.com>, freebsd-fs@freebsd.org, freebsd-emulation@freebsd.org, stable-list freebsd <freebsd-stable@freebsd.org> Subject: Re: ZFS and sh(1) panic: spin lock [lock addr] (smp rendezvous) held by [sh(1) proc tid] too long Message-ID: <201002221202.29747.jhb@freebsd.org> In-Reply-To: <3bbf2fe11002201419v52b249ccg8d82c8ae747cf318@mail.gmail.com> References: <179b97fb1001270941m2d8e9c8au20abc798c16b9c11@mail.gmail.com> <3bbf2fe11002201419v52b249ccg8d82c8ae747cf318@mail.gmail.com>
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On Saturday 20 February 2010 5:19:39 pm Attilio Rao wrote: > 2010/1/27 Brandon Gooch <jamesbrandongooch@gmail.com>: > > The machine, a Dell Optiplex 755, has been locking up recently. The > > situation usually occurs while using VirtualBox (running a 64-bit > > Windows 7 instance) and doing anything else in another xterm (such as > > rebuilding a port). I've been unable to reliably reproduce it (I'm in > > an X session and the machine will not panic "properly"). > > > > However, while rebuilding Xorg today at ttyv0 and runnning > > VBoxHeadless on ttyv1, I managed to trigger what I believe is the > > lockup. > > > > I've attached a textdump in hopes that someone may be able to take a > > look and provide clues or instruction on debugging this. > > I think that jhb@ saw a similar problem while working on nVidia driver > or the like. > Not sure if he made any progress to debug this. That was due to a weird bug where I was accidentally zero'ing the local APIC due to a then-bug in sg_pager.c (it was forcing the VM system to clear the pages it mapped by accident). That should not be the explanation for this. -- John Baldwin
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