Loading the parport_pc modules crashes in 2.6.2-rc; I have recently done
a "bk pull" and enabled some PNP options, among them ISA PNP.
Find attached the gzipped config and a decoded oops. Does ksymoops 2.4
(using 2.4.8) understand Kernel 2.6 kallsyms? Doesn't seem so. 2.4.9
segfaults for me, haven't yet figured why.
--
Matthias Andree
Encrypt your mail: my GnuPG key ID is 0x052E7D95
Matthias Andree <[email protected]> wrote:
>
> Loading the parport_pc modules crashes in 2.6.2-rc; I have recently done
> a "bk pull" and enabled some PNP options, among them ISA PNP.
Often this is because some other, unrelated module left things registered
after it was removed. Or otherwise wrecked shared data structures.
So what you ned to do is to take careful note of what other modules were
loaded and unloaded leading up to the crash, and suspect those.
There is one known problem in this area: unloading 8250_pnp will wreck the
kobject tree. Try
ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.2-rc1/2.6.2-rc1-mm3/broken-out/8250_pnp-cleanup.patch
On Sun, 25 Jan 2004, Andrew Morton wrote:
> Matthias Andree <[email protected]> wrote:
> >
> > Loading the parport_pc modules crashes in 2.6.2-rc; I have recently done
> > a "bk pull" and enabled some PNP options, among them ISA PNP.
>
> Often this is because some other, unrelated module left things registered
> after it was removed. Or otherwise wrecked shared data structures.
The breakage is somehow related to CONFIG_PNP. I set that option to N,
ran "make oldconfig ; make", installed the kernel, rebooted, problem
gone.
--
Matthias Andree
Encrypt your mail: my GnuPG key ID is 0x052E7D95
In article <[email protected]>,
Matthias Andree <[email protected]> wrote:
| On Sun, 25 Jan 2004, Andrew Morton wrote:
|
| > Matthias Andree <[email protected]> wrote:
| > >
| > > Loading the parport_pc modules crashes in 2.6.2-rc; I have recently done
| > > a "bk pull" and enabled some PNP options, among them ISA PNP.
| >
| > Often this is because some other, unrelated module left things registered
| > after it was removed. Or otherwise wrecked shared data structures.
|
| The breakage is somehow related to CONFIG_PNP. I set that option to N,
| ran "make oldconfig ; make", installed the kernel, rebooted, problem
| gone.
2.6.2-rc2:
root> grep PNP .config
CONFIG_PNP=y
CONFIG_PNP_DEBUG=y
CONFIG_ISAPNP=y
CONFIG_PNPBIOS=y
# CONFIG_BLK_DEV_IDEPNP is not set
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
Boots and loads parport_pc just fine, so it looks as if either it got
fixed (likely) or other evildoers are at work.
--
bill davidsen <[email protected]>
CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.
On Mon, Jan 26, 2004 at 02:08:32AM +0100, Matthias Andree wrote:
> On Sun, 25 Jan 2004, Andrew Morton wrote:
>
> > Matthias Andree <[email protected]> wrote:
> > >
> > > Loading the parport_pc modules crashes in 2.6.2-rc; I have recently done
> > > a "bk pull" and enabled some PNP options, among them ISA PNP.
> >
> > Often this is because some other, unrelated module left things registered
> > after it was removed. Or otherwise wrecked shared data structures.
>
> The breakage is somehow related to CONFIG_PNP. I set that option to N,
> ran "make oldconfig ; make", installed the kernel, rebooted, problem
> gone.
>
> --
> Matthias Andree
Are you using any modules other than parport_pc? Have you unloaded them
before loading parport_pc?
Thanks,
Adam
On Mon, 26 Jan 2004, Adam Belay wrote:
> Are you using any modules other than parport_pc? Have you unloaded them
> before loading parport_pc?
Plenty I have, and no, I haven't tried unloading (or, for that matter,
preferably not loading them in the first place) them. Will take a while
before I can test again, I don't have PNP requirements at the moment,
even my USB configuration is static.
--
Matthias Andree
Encrypt your mail: my GnuPG key ID is 0x052E7D95
On Sun, 25 Jan 2004, Andrew Morton wrote:
> There is one known problem in this area: unloading 8250_pnp will wreck the
> kobject tree. Try
>
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.2-rc1/2.6.2-rc1-mm3/broken-out/8250_pnp-cleanup.patch
Works for me. Thank you.
--
Matthias Andree
Encrypt your mail: my GnuPG key ID is 0x052E7D95