[uml-devel] Error messages booting 2.6.16-pre3

[uml-devel] Error messages booting 2.6.16-pre3

[Rob Landley]

So I finally got around to building 2.6.16-pre3 on my newly upgraded Ubuntu 
"Flatulent Badger" system, like so:

tar xvjf linux-2.6.13-rc3.tar.bz2

cat > allno.config << EOF
CONFIG_MODE_SKAS=y
CONFIG_BINFMT_ELF=y
CONFIG_HOSTFS=y
CONFIG_SYSCTL=y
CONFIG_STDERR_CONSOLE=y
CONFIG_UNIX98_PTYS=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_LBD=y
CONFIG_EXT2_FS=y
CONFIG_PROC_FS=y
EOF
make ARCH=um allnoconfig
make ARCH=um

Run it:

./linux rootfstype=hostfs rw init=/bin/sh

And it's developed yet more verbose error messages:

> Checking for /dev/anon on the host...Not available (open failed with errno
> 2) Using 2.6 host AIO
> io scheduler noop registered (default)
> loop: loaded (max 8 devices)
> Initialized stdio console driver
> parse_chan_pair failed for device 1
> parse_chan_pair failed for device 2
> parse_chan_pair failed for device 3
> parse_chan_pair failed for device 4
> parse_chan_pair failed for device 5
> parse_chan_pair failed for device 6
> parse_chan_pair failed for device 7
> parse_chan_pair failed for device 8
> parse_chan_pair failed for device 9
> parse_chan_pair failed for device 10
> parse_chan_pair failed for device 11
> parse_chan_pair failed for device 12
> parse_chan_pair failed for device 13
> parse_chan_pair failed for device 14
> parse_chan_pair failed for device 15
> Console initialized on /dev/tty0
> VFS: Mounted root (hostfs filesystem).
> idr_remove called for id=1 which is not allocated.
> 0817f984:  [<080f2c7f>] sub_remove+0xef/0x100
> 0817f9a0:  [<0806305a>] set_signals+0x1a/0x30
> 0817f9a8:  [<080905ef>] free_hot_cold_page+0xdf/0x120
> 0817f9ac:  [<080a3633>] kfree+0x23/0x90
> 0817f9c4:  [<080f2cbf>] idr_remove+0x2f/0xc0
> 0817f9dc:  [<080fbd22>] release_dev+0x5e2/0x700
> 0817fa1c:  [<0806b296>] __wake_up+0x46/0x60
> 0817fa44:  [<0806305a>] set_signals+0x1a/0x30
> 0817fa4c:  [<080fb1d5>] init_dev+0x1b5/0x5a0
> 0817fa98:  [<080fbf6f>] tty_open+0x12f/0x380
> 0817fab4:  [<080f340a>] kobject_get+0x1a/0x30
> 0817fac0:  [<080afcff>] cdev_get+0xf/0x20
> 0817fac8:  [<080afeef>] exact_lock+0xf/0x20
> 0817faec:  [<080fbe40>] tty_open+0x0/0x380
> 0817faf4:  [<080afdce>] chrdev_open+0x9e/0x140
> 0817fb14:  [<080afd30>] chrdev_open+0x0/0x140
> 0817fb18:  [<080a57e0>] __dentry_open+0x90/0x190
> 0817fb34:  [<080a5a58>] nameidata_to_filp+0x38/0x50
> 0817fb50:  [<080a593c>] do_filp_open+0x5c/0x60
> 0817fb78:  [<080ec008>] get_request+0x238/0x2f0
> 0817fb98:  [<080a5b4c>] get_unused_fd+0x6c/0xc0
> 0817fbc0:  [<080a5cb1>] do_sys_open+0x51/0xa0
> 0817fbe0:  [<080a5d27>] sys_open+0x27/0x30
> 0817fbe8:  [<080ec008>] get_request+0x238/0x2f0
> 0817fbf4:  [<0805c5fc>] handle_syscall+0xec/0x100
> 0817fbf8:  [<080ec008>] get_request+0x238/0x2f0
> 0817fc14:  [<080ec008>] get_request+0x238/0x2f0
> 0817fc34:  [<080ec008>] get_request+0x238/0x2f0
> 0817fc64:  [<080658d8>] handle_trap+0x28/0x130
> 0817fc8c:  [<08065f44>] userspace+0x1c4/0x220
> 0817fcd8:  [<08054f10>] init+0x0/0x170
> 0817fce4:  [<0805c0c9>] new_thread_handler+0xe9/0x120
>
> sh-3.00#

Came up and ran, but looks really ugly.  Entirely reproducible so far...

Anybody got any ideas?

Rob
-- 
Never bet against the cheap plastic solution.



-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel

Re: [uml-devel] Error messages booting 2.6.16-pre3

[Jeff Dike]

On Wed, Feb 15, 2006 at 05:13:52PM -0500, Rob Landley wrote:
> > parse_chan_pair failed for device 1
> > parse_chan_pair failed for device 2
> > parse_chan_pair failed for device 3
> > parse_chan_pair failed for device 4
> > parse_chan_pair failed for device 5
> > parse_chan_pair failed for device 6
> > parse_chan_pair failed for device 7
> > parse_chan_pair failed for device 8
> > parse_chan_pair failed for device 9
> > parse_chan_pair failed for device 10
> > parse_chan_pair failed for device 11
> > parse_chan_pair failed for device 12
> > parse_chan_pair failed for device 13
> > parse_chan_pair failed for device 14
> > parse_chan_pair failed for device 15

I don't know about the rest of this, but something like this just
happened to me.  It was attaching the consoles to a host portal which
another UML was already using.  I got semi-reasonable "that portal is
already in use" errors in between the parse_chan_pair things.

So, were you trying to reuse some host devices, and which ones?  An
improvement in the errors might be in order here.

				Jeff


-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel

Re: [uml-devel] Error messages booting 2.6.16-pre3

[Rob Landley]

On Friday 17 February 2006 3:29 pm, Jeff Dike wrote:
> On Wed, Feb 15, 2006 at 05:13:52PM -0500, Rob Landley wrote:
> > > parse_chan_pair failed for device 1
> > > parse_chan_pair failed for device 2
> > > parse_chan_pair failed for device 3
> > > parse_chan_pair failed for device 4
> > > parse_chan_pair failed for device 5
> > > parse_chan_pair failed for device 6
> > > parse_chan_pair failed for device 7
> > > parse_chan_pair failed for device 8
> > > parse_chan_pair failed for device 9
> > > parse_chan_pair failed for device 10
> > > parse_chan_pair failed for device 11
> > > parse_chan_pair failed for device 12
> > > parse_chan_pair failed for device 13
> > > parse_chan_pair failed for device 14
> > > parse_chan_pair failed for device 15
>
> I don't know about the rest of this, but something like this just
> happened to me.  It was attaching the consoles to a host portal which
> another UML was already using.  I got semi-reasonable "that portal is
> already in use" errors in between the parse_chan_pair things.
>
> So, were you trying to reuse some host devices, and which ones?  An
> improvement in the errors might be in order here.


I don't know.  The did my standard "rootfstype=hostfs rw init=/bin/sh" thing, 
which should only have on process (a shell) on /dev/console.  All that 
happened before that even managed to run /bin/sh.

I don't think I had any other type of console support even built into the 
thing.  (Console on stderr support, everything else disabled.)

No idea what devices it was talking about...

> 				Jeff

Rob
-- 
Never bet against the cheap plastic solution.


-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel