Date: Sat, 2 Mar 2002 13:59:14 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Kris Kennaway <kris@obsecurity.org> Cc: Matthew Dillon <dillon@apollo.backplane.com>, 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: <20020302135914.A33051@xor.obsecurity.org> In-Reply-To: <20020301175632.A21599@xor.obsecurity.org>; from kris@obsecurity.org on Fri, Mar 01, 2002 at 05:56:32PM -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>
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On Fri, Mar 01, 2002 at 05:56:32PM -0800, Kris Kennaway wrote:
> On Fri, Mar 01, 2002 at 05:50:32PM -0800, Matthew Dillon wrote:
>=20
> > I wonder if this has anything to do with MFS's VM pages getting
> > paged in and out.
> >=20
> > Could you try hacking mount_mfs to mlock() the MFS memory? As
> > shown below. I'm not entirely sure this will actually do anything,
> > but it's worth a shot (assuming you have enough memory to cover all
> > your MFS mounted filesystems).
> >=20
> > If this does the trick I'll take a look at the way MFS accesses
> > the process's VM space. If it doesn't at least we will know it
> > isn't related to MFS's paging.
>=20
> Will try!
>=20
> 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
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