RELENG_6 vm_fault panic on filesystem mount

[Joerg Pernfuss]

On Fri, 18 Nov 2005 18:59:34 +0000 (GMT)
Robert Watson <rwatson at FreeBSD.org> wrote:

> 
> On Fri, 18 Nov 2005, Joerg Pernfuss wrote:
> 
> > #6  0xc078806a in calltrap ()
> > at /usr/src/sys/i386/i386/exception.s:139 #7  0xc070c00c in
> > ufsdirhash_build (ip=0xc5426948)
> > at /usr/src/sys/ufs/ufs/ufs_dirhash.c:232 #8  0xc070f5c3 in
> > ufs_lookup (ap=0xeabb6824) at /usr/src/sys/ufs/ufs/ufs_lookup.c:192
> > #9  0xc070d8f4 in ufs_extattr_lookup (start_dvp=0xc5414dd0,
> > lockparent=0x2, dirname=0xd71f3000 "\002", vp=0xd71f3000,
> > td=0xc5558780) at /usr/src/sys/ ufs/ufs/ufs_extattr.c:274 #10
> > 0xc070dfd6 in ufs_extattr_autostart (mp=0xc4ca3000, td=0xc5558780)
> > at /usr/src/sys/ufs/ufs/ufs_extattr.c:463 #11 0xc0706fa6 in
> > ffs_mount (mp=0xc4ca3000, td=0xc5558780)
> > at /usr/src/sys/ufs/ffs/ffs_vfsops.c:779 #12 0xc0640d57 in
> > vfs_donmount (td=0xc5558780, fsflags=0x8008, fsoptions=0xeabb6bf4)
> > at /usr/src/sys/kern/vfs_mount.c:739 #13 0xc06427c0 in kernel_mount
> > (ma=0xc5235240, flags=0x0) at pcpu.h:162
> 
> The UFS1 extended attribute code performs directory listings,
> lookups, and file operations very early in the "life cycle" of a UFS
> file system in order to identify attribute backing files.  We could
> be looking at a bug or new negative interaction between the extended
> attribute code in UFS1, dirhash, and the changes to VFS required to
> get SMP VFS support in 6.x. In principle, however, the EA code waits
> until everything is "ready to go" before starting on file system
> I/O.  Are you actively using UFS1 attributes on that file system?

No, it is just my nfs exported distfiles collection. Nothing special
I was aware of until recently.

> Could I ask you to boot to single user mode, try mounting the file
> system, then try compiling a kernel without UFS_EXTATTR and
> UFS_EXTATTR_AUTOSTART, boot to single user mode, and see if you can
> mount the file system successfully?  I.e., compare mounting with and
> without extended attributes, but on a "quiet" file system so any
> existing extended attributes remain in sync.

No problem, the kernel is already building.

I'll post the output as soon as I have it.

Joerg
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