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Ian Chilton | 2 Dec 2002 17:43
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UML Error

Hello,

I have not run a UML on this before before. Any ideas what's wrong?:

[uml <at> gatekeeper:~]$ ./linux-2.4.19-31um
Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Linux version 2.4.19-31um (root <at> buzz) (gcc version 3.2) #1 Mon Nov 18
14:13:14 GMT 2002
On node 0 totalpages: 8192
zone(0): 8192 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/ubd0
Calibrating delay loop... 414.72 BogoMIPS
Memory: 28828k available
Dentry cache hash table entries: 4096 (order: 3, 32768 bytes)
Inode cache hash table entries: 2048 (order: 2, 16384 bytes)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 8192 (order: 3, 32768 bytes)
Checking for host processor cmov support...<0>Kernel panic: Kernel mode
signal 4
In idle task - not syncing

[uml <at> gatekeeper:~]$ ./linux-2.4.19-31um mode=tt
tracing thread pid = 1373
Linux version 2.4.19-31um (root <at> buzz) (gcc version 3.2) #1 Mon Nov 18
14:13:14 GMT 2002
On node 0 totalpages: 8192
(Continue reading)

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David Coulson | 2 Dec 2002 18:24

Re: UML Error

Ian Chilton wrote:
> Does this mean it's impossible to run a UML on this box?

No, it means Jeff has to fix UML to check for cmov without falling to 
pieces.

:-)

David

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David Coulson                                    email: d <at> vidcoulson.com
Linux Developer /                          web: http://davidcoulson.net/
Network Engineer                                   phone: (216) 533-6967

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Pete Zaitcev | 2 Dec 2002 18:47
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Re: UML Error

> From: David Coulson <david <at> davidcoulson.net>
> Date: Mon, 02 Dec 2002 12:24:43 -0500

> > Does this mean it's impossible to run a UML on this box?
> 
> No, it means Jeff has to fix UML to check for cmov without falling to 
> pieces.

I'm afraid Ian has to do it. Jeff might not even have a P5 box.

-- Pete

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Jeff Dike | 2 Dec 2002 19:06

uml-patch-2.4.19-33

The big news in this patch is that I think I fixed the problems with running
JVMs under UML.  I had already fixed something between -17 and -32 which
made JVMs sort of run.  

There was still a problem with one of the Tomcat demos.  I tracked that down
to SA_SIGINFO signal frames not being identical to the host.  This is fixed
and all of the stuff that comes with Tomcat now runs.

There were a bunch of other bugs fixed, including
	signals are now re-enabled after an interrupt in userspace
	SIGIO is now blocked at the start of main, so rebooting UML should
no longer crap out with "IO possible"
	the problems with gdb symbols being undefined was fixed
	fixed a memory corruption bug in the gdb xterm initialization

				Jeff

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David Coulson | 2 Dec 2002 18:19

Re: UML Error

Ian Chilton wrote:
> Checking for host processor cmov support...<0>Kernel panic: Kernel mode
> signal 4
> In idle task - not syncing

cat /proc/cpuinfo | grep cmov

See if the system has cmov support.

David

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David Coulson                                    email: d <at> vidcoulson.com
Linux Developer /                          web: http://davidcoulson.net/
Network Engineer                                   phone: (216) 533-6967

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Ian Chilton | 2 Dec 2002 18:21
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Re: UML Error

Hello,

> cat /proc/cpuinfo | grep cmov
> See if the system has cmov support.

[uml <at> gatekeeper:~]$ cat /proc/cpuinfo |grep -i cmov
[uml <at> gatekeeper:~]$

Does this mean it's impossible to run a UML on this box?

Thanks.

Ian

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Cameron Kerr | 2 Dec 2002 21:01
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Re: UML Error

On Mon, Dec 02, 2002 at 12:47:50PM -0500, Pete Zaitcev wrote:

> > No, it means Jeff has to fix UML to check for cmov without falling to 
> > pieces.
> 
> I'm afraid Ian has to do it. Jeff might not even have a P5 box.

Shoudn't matter

cat /proc/cpuinfo | grep ^flags
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat \
  pse36 mmx fxsr sse

My machine is a PIII 800

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Cameron Kerr
Email:   cameron.kerr <at> paradise.net.nz
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Jeff Dike | 2 Dec 2002 21:38

Re: [PATCH] Bitmap allocation problem with COW

steveb <at> snapgear.com said:
> The problem seems to be that the rounding is wrong. The following
> patch fixes the problem for me, but I don't guarantee it. 

Yup, that's right.  I've been holding off fixing this problem because it 
requires bumping the COW version number.

				Jeff

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Jeff Dike | 2 Dec 2002 21:38

Re: /tmp in arch/um/kernel/tempfile.c

mhennig <at> astaro.com said:
> crashed  because for lack of memory....

Details on the crashes?

				Jeff

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Jeff Dike | 2 Dec 2002 21:38

Re: panic on -13um, backtrace included

sitz <at> onastick.net said:
> Got the following panic: 

Well, that's all the right information.  This looks like memory corruption,
so could you enable CONFIG_DEBUG_SLAB and see if that makes it panic any
earlier?

				Jeff

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Gmane