Date: Wed, 07 Nov 2007 12:36:59 -0500 From: Ken Smith <kensmith@cse.Buffalo.EDU> To: avleeuwen@piwebs.com Cc: Kostik Belousov <kostikbel@gmail.com>, Pieter de Goeje <pieter@degoeje.nl>, freebsd-current@freebsd.org, Rolf Witt <fbsd-st@donut.de>, Tim Bishop <tim-lists@bishnet.net> Subject: Re: panic: ffs_blkfree: freeing free block Message-ID: <1194457019.35649.82.camel@opus.cse.buffalo.edu> In-Reply-To: <d86b48730710230235y78865ed4nd2849ed3f01a92d5@mail.gmail.com> References: <200710131857.46963.pieter@degoeje.nl> <200710140408.46121.pieter@degoeje.nl> <471427BE.10500@freebsd.org> <d86b48730710160320i4edd98b9v94e451c1e5f6531b@mail.gmail.com> <20071016112907.GD6511@deviant.kiev.zoral.com.ua> <4715FAA7.7030404@freebsd.org> <20071018093948.GN6511@deviant.kiev.zoral.com.ua> <d86b48730710180259u4dccccdcx245bc333c41258e3@mail.gmail.com> <d86b48730710180940h4f29cdden3c48c23a75328819@mail.gmail.com> <20071019091249.GI88271@carrick.bishnet.net> <d86b48730710230235y78865ed4nd2849ed3f01a92d5@mail.gmail.com>
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On Tue, 2007-10-23 at 11:35 +0200, Arjan van Leeuwen wrote:
> 2007/10/19, Tim Bishop <tim-lists@bishnet.net>:
> >
> > On Thu, Oct 18, 2007 at 06:40:04PM +0200, Arjan van Leeuwen wrote:
> > > > are softupdates on ?
> > > >
> > > > Yes. Turning them off seems to fix the problem (fingers crossed - I
> > only
> > > > turned it off this morning, didn't have a panic yet)
> > >
> > > After working for a whole day without softupdates, I can say that
> > turning
> > > them off at least causes less panics to happen than with them turned =
on,
> > > maybe they even don't happen at all without softupdates; I haven't ha=
d a
> > > panic all day, while I have one every few hours with softupdates turn=
ed
> > on.
> >
> > I've been running for the best part of a day now with softupdates turne=
d
> > off and so far no panics. I'm running tinderbox on the host, and it
> > would quite reliably crash it before.
> >
> > Of course it's hard to say if this has fixed the problem... maybe it
> > doesn't happen as often, or maybe my data is being slowly chewed up
> > instead ;-)
>=20
> It looks like on the same system, I'm able to reliably panic zfs as well,
> under the exact same conditions (i.e. linking a particularly big piece of
> software). Maybe this is not a problem in the filesystem at all. I've not
> been able to get a coredump yet from the zfs panic.
> This is in 7.0-PRERELEASE, btw (I switched to RELENG_7 when the branching
> happened).
Is anyone who had been able to trigger this panic still having problems
with recent kernels (and soft updates turned on)? I've checked with a
few people who had been experiencing the panic and they can no longer
trigger it.
It's at least a tiny bit possible some of the VM fixes that have gone in
addressed this problem. We'd like to find out if anyone can still
trigger this.
Thanks.
--=20
Ken Smith
- From there to here, from here to | kensmith@cse.buffalo.edu
there, funny things are everywhere. |
- Theodore Geisel |
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