Date: Sat, 2 Mar 2002 14:28:07 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Kris Kennaway <kris@obsecurity.org>, Ian Dowse <iedowse@maths.tcd.ie>, Kirk McKusick <mckusick@mckusick.com>, Finch <dot@dotat.at>, fs@FreeBSD.ORG, fanf@chiark.greenend.org.uk Subject: Re: UFS panic on -stable Message-ID: <20020302142807.B33223@xor.obsecurity.org> In-Reply-To: <200203022210.g22MA8B56666@apollo.backplane.com>; from dillon@apollo.backplane.com on Sat, Mar 02, 2002 at 02:10:08PM -0800 References: <200202260141.g1Q1f8i28365@beastie.mckusick.com> <200202260237.aa51774@salmon.maths.tcd.ie> <20020226184340.A78562@xor.obsecurity.org> <20020228135233.B5586@xor.obsecurity.org> <20020301173740.A21179@xor.obsecurity.org> <200203020150.g221oWS48392@apollo.backplane.com> <20020301175632.A21599@xor.obsecurity.org> <20020302135914.A33051@xor.obsecurity.org> <200203022210.g22MA8B56666@apollo.backplane.com>
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On Sat, Mar 02, 2002 at 02:10:08PM -0800, Matthew Dillon wrote:
>=20
> :> Will try!
> :>=3D20
> :> I've also given up on trying to get packages built for now, and am
> :> just running some MFS stress tests to try and trigger panics.
> :
> :So much for the MFS theory:
> :
> :/x: bad dir ino 1006899 at offset 0: mangled entry
> :panic: ufs_dirbad: bad dir
> :Debugger("panic")
> :Stopped at Debugger+0x35: movb $0,in_Debugger.426
> :db>
> :
> :/x is a local UFS filesystem.
> :
> :Kris
>=20
> Do a 'mount -v'.
I posted one earlier in the thread, but here it is again:
216.136.204.23:/a/nfsroots/4.dir4 on / (nfs, read-only)
mfs:13 on /etc (mfs, asynchronous, local)
mfs:21 on /var (mfs, asynchronous, local)
mfs:28 on /tmp (mfs, asynchronous, local)
mfs:33 on /dev (mfs, asynchronous, local)
/dev/ad0e on /a (ufs, local, soft-updates, writes: sync 2 async 1038, reads=
: sync 255 async 1482)
/dev/ad0f on /x (ufs, local, soft-updates, writes: sync 718 async 155758, r=
eads: sync 21022 async 232)
bento:/var/portbuild/4/ports on /x/tmp/4/chroot/26132/a/ports (nfs, read-on=
ly)
bento:/var/portbuild/4/src on /x/tmp/4/chroot/26132/usr/src (nfs, read-only)
bento:/var/portbuild/usr/opt/doc on /x/tmp/4/chroot/26132/usr/opt/doc (nfs,=
read-only)
> Have you managed to get it to panic in a repeatable
> fashion yet?
Unfortunately not, except by starting up a package build and waiting a
bit :-) However I just realised that I have another datapoint as to
when the problem was introduced, because the alpha cluster has been
perfectly stable and is running a 4.x kernel dated around Jan 26
(probably a few days earlier, because peter had problems getting the
machines to netboot). The most obvious commit after that time period
was this one:
dillon 2002/01/31 10:51:48 PST
Modified files: (Branch: RELENG_4)
sys/kern vfs_subr.c
Log:
MFC new vlrureclaim trigger-point code. [...]
I'm going to try backing that out now to see if it fixes things.
Kris
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