Re: mount hanging 2.4.12

[Matthew Dharm]

--CdrF4e02JqNVZeln
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Media change is broken for the SDDR-09 driver.  That's why it's
experimental, among other reasons.

Don't worry about that, but if you've got a non-media change related
problem, then I would look at that.

Matt

On Sat, Oct 13, 2001 at 10:01:06PM -0400, Alexander Viro wrote:
>=20
>=20
> On Sat, 13 Oct 2001, Ed Tomlinson wrote:
>=20
> > Oct 13 19:28:31 oscar kernel: usb-uhci.c: interrupt, status 2, frame# 1=
147
> > Oct 13 19:28:31 oscar kernel:  I/O error: dev 08:01, sector 0
> > Oct 13 19:28:31 oscar kernel: FAT: unable to read boot sector
> > Oct 13 19:28:31 oscar kernel: VFS: Disk change detected on device sd(8,=
1)
> > Oct 13 19:28:31 oscar kernel: SCSI device sda: 131072 512-byte hdwr sec=
tors (67 MB)
> > Oct 13 19:28:31 oscar kernel: sda: Write Protect is on
> > Oct 13 19:28:31 oscar kernel:  sda: sda1
> >=20
> > The device is a usb smartmedia reader using the sddr-09 support.
>=20
> OK, looks like:
> 	a) ->check_media_change() is screwed for that device.
> 	b) we are hanging on something interesting.  It isn't ->s_umount
> and it's very unlikely to be ->s_lock or mount_sem.  What it might be,
> though... I suspect that ->bd_sem is screwed.
>=20
> 	Could you reproduce the hang and then do Alt-Sysrq-T?  That should
> give you stack traces.  I'm especially interested in stack trace of hung
> mount(8).  It's nice to know that it ends on down(), but knowing what had
> called that down() would help big way.
>=20
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [e-mail]
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

--=20
Matthew Dharm                              Home: mdharm-usb@one-eyed-alien.=
net=20
Maintainer, Linux USB Mass Storage Driver

NYET! The evil stops here!
					-- Pitr
User Friendly, 6/22/1998

--CdrF4e02JqNVZeln
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE7yPozz64nssGU+ykRArRTAJ0cBQNoQSClTGrxHAyKQ/1kDUHOSwCg+o37
ou8Jb28rbEgXGjQtXYgpqjI=
=fmik
-----END PGP SIGNATURE-----

--CdrF4e02JqNVZeln--