I recently upgraded some of my guest UML instances from and old kernel
version (2.6.20.6) to a recent version (2.6.24.2). However, I am now
experiencing strange behavior from various software packages following the
upgrade (I use Debian lenny). For example, my ssh daemon has started
crashing period
> On Sat, Feb 23, 2008 at 11:14:51AM -0800, Anthony Brock wrote:
>> My instance has the follow on the file system:
>>
>> # ls -lA /dev/*rand*
>> crw-rw-rw- 1 root root 1, 8 2008-02-11 11:43 /dev/random
>> crw-rw-rw- 1 root root 1, 9 2008-02-23 10:06 /dev/urand
Quoting Jeff Dike <[EMAIL PROTECTED]>:
> On Tue, Feb 26, 2008 at 08:30:35AM -0800, Anthony Brock wrote:
>> It appears that this patch is designed against 2.6.22. Do you want me to
>> downgrade from 2.6.24.2 to 2.6.22 to try this?
>
> It's against 2.6.25-rc2-mm1
>> On Tue, Feb 26, 2008 at 02:12:53PM -0800, Anthony Brock wrote:
> So, I'm going to try and manually fit the rejected portions into the code.
It has obviously been too long since I developed any software. I worked
past this issue with the '-l' flag to patch and it is cur
> On Tue, Feb 26, 2008 at 02:12:53PM -0800, Anthony Brock wrote:
>> # bzip2 -dc ../2.6.25-rc2-mm1.bz2 | patch
>> The next patch would create the file o2cb,
>> which already exists! Assume -R? [n]
>
> That looks right - I'd double-check that the tree is what you thi
> On Tue, Feb 26, 2008 at 08:45:24PM -0800, Anthony Brock wrote:
>> It has obviously been too long since I developed any software. I worked
>> past this issue with the '-l' flag to patch and it is currently
>> compiling.
>> I will start testing the new ker
Hmmm, I would guess that the random patch is helping a little as I have only
had two recurrences since installing new kernel:
Feb 27 11:35:09 dns2 sshd[1152]: fatal: Couldn't obtain random bytes (error
604389476)
Feb 27 14:29:16 www sshd[3060]: fatal: Couldn't obtain random bytes (error
604389476)
> On Fri, Feb 29, 2008 at 12:35:38PM +0100, Jan Wolff wrote:
>> Could the entropy in /dev/random be exhausted because Anthony drains
>> more
>> entropy than is produced?
>
> That's what I'm thinking. The UML /dev/hw_random is attached to the
> host's /dev/random. If you have rng-utils installed i
I have been running several UML instances on older kernels for some time
hoping to see a fix for the random issue. However, a recent upgrade to
2.6.26-rc5 now reults in periodic boot failures of the virtual systems.
Downgrading to 2.6.25-rc2-mm1 returns to previous behavior (reliable boot,
but othe
I'm interested in trying a more recently kernel version that 2.6.24. Where
would I download the latest version of SKAS4? Also, is it available for
2.6.27? Has it reached the point where it is considered production or beta
quality? Or is it still alpha code?
If it is still alpha code, are there any
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
Jonas Meurer
Sent: Friday, December 03, 2004 5:05 PM
To: [EMAIL PROTECTED]
Subject: Re: [uml-user] bind9 utils seg fault
On 02/12/2004 Tad Kollar wrote:
> I'm running a 2.4.27 host + host-skas3-2.4.25.patch and
Franck,
First, did you apply the patch via something like:
wget -c
http://www.user-mode-linux.org/~blaisorblade/patches/guest/uml-2.4.27-bs1/um
l-2.4.27-bs1.patch.bz2
cd linux-2.4.27
bzip2 -dc ../uml-2.4.27-bs1.patch.bz2 |patch -p1
Your error suggest that you might be missing the '-p1'.
Tony
On Saturday 04 December 2004 07:32, Christopher S. Aker wrote:
> You might also want to give 2.6.9-bb4 a shot as your guest patch.
I will give 2.6.9-bb4 a try tomorrow. However, I am now noticing some
interesting behavior (now that I'm paying closer attention). Both of my UML
instances will start
Quoting "Christopher S. Aker" <[EMAIL PROTECTED]>:
>> I've been experiencing erratic problems with bind 9.2.3 (bind-9.2.3-76) on
>> my SuSE 9.1 UML images. The host is running a stock SuSE 2.6.5 kernel
>> (2.6.5-7.111-smp) while the guest is running 2.6.7-1um. The software will
>> run for hours or
Quoting Anthony Brock <[EMAIL PROTECTED]>:
Quoting "Christopher S. Aker" <[EMAIL PROTECTED]>:
I've been experiencing erratic problems with bind 9.2.3 (bind-9.2.3-76) on
my SuSE 9.1 UML images. The host is running a stock SuSE 2.6.5 kernel
(2.6.5-7.111-smp) while the gues
Quoting Anthony Brock <[EMAIL PROTECTED]>:
Quoting Anthony Brock <[EMAIL PROTECTED]>:
Quoting "Christopher S. Aker" <[EMAIL PROTECTED]>:
You might also want to give 2.6.9-bb4 a shot as your guest patch.
I will try this
same kernel (compiled and run) on a SuSE 9.1 host
Quoting Blaisorblade <[EMAIL PROTECTED]>:
Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Suspended (signal)
Well, this problem was described earlier - and it's workarounded by
exporting
the env. var LD_ASSUME_KERNEL=2.4.1 before running UML (so that ld.so will
link
>>> Paul Warren <[EMAIL PROTECTED]> 02/09/05 07:12AM >>>
> Right, but the memory is mmapped to that file. My understanding is
that
> the memory will only be synced with the disk when either (a) msync
(or
> munmap) gets called or (b) the kernel has nothing better to do.
> I'm assuming that (a) doe
Paul Warren <[EMAIL PROTECTED]> 02/09/05 10:31AM >>>
> A delay. My original question was, does using tempfs do more than
> prevent the memory from getting swapped out? We have developed a
patch
> that mlock()s the memory (using a setuid helper app), and thus
should
> stop it from getting swa
Quoting Nuutti Kotivuori <[EMAIL PROTECTED]>:
No problem - I'm just mailing here in case someone has encountered the
kind of problems we are seeing elsewhere.
We've encountered this on some of our systems. However, it only seems
to happen
on a shutdown, not a reboot. Does this fit with your experi
You might also try some of the ones listed at on the wiki:
http://uml.harlowhill.com/index.php/UMLRootFilesystems
However, these are also somewhat dated. If you find others, please add them
to this site.
Tony
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf O
Wiki has been updated with both David Houlden's Slackware images and Jim
Carter's SuSE instructions.
Tony
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Quoting Dave Pearson <[EMAIL PROTECTED]>:
Rather than use hostfs, I've been using NFS to mount my home on various
umls - it gives me more flexibility to move the uml to a machine with
more horsepower if I want to without shagging out the setup. If you can
get TunTap working with 2.4 then this is a
Fabio,
The most advanced, stable and mature UML kernel (IMHO) is a 2.6.10 (or newer)
host kernel with v7 or newer of the SKAS patch. This host should be
able to run
almost any functional UML host. You can download the SKAS patch from:
http://www.user-mode-linux.org/~blaisorblade/
However, this de
>>> Blaisorblade <[EMAIL PROTECTED]> 04/14/05 02:16PM >>>
>On Tuesday 12 April 2005 19:42, Anthony Brock wrote:
>> The most advanced, stable and mature UML kernel (IMHO) is a 2.6.10 (or
>> newer) host kernel with v7 or newer of the SKAS patch. This host
Have you tried the command:
screen -ls
This, according to my man page, is the way to produce a list of screens.
Tony
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Jack
> Sent: Saturday, April 23, 2005 5:47 AM
> To: user-mode-linux-user
> Subject:
Given how often this has come up recently, should we add something about the
most "stable" or "suggested" kernel combinations to the wiki? Of course, this
would require someone to keep it updated as new releases come out... :)
Tony
>>> <[EMAIL PROTECTED]> 04/26/05 01:56AM >>>
> Hello, i have to
Rick,
This is a security question in addition to a management question. For example,
assume that one of your guest instances is eventually compromised. Will it
matter if the attacker can freely access the file system of the other
instances? If so, then you should look at creating separate accou
Jack,
Have you removed the /lib/tls directory?
Tony
Quoting Jack <[EMAIL PROTECTED]>:
hello .
on my uml host ,i try to start mysqld ,but faild ,
and i checked the mysqld.log . it reports below:
050428 03:28:42 mysqld started
^G/usr/libexec/mysqld: Can't read dir of '/tmp/' (Errcode: 13)
^G
Mike,
I believe it's the second hex number that must be even. Take a look at the
third paragraph on the following site:
http://www.erg.abdn.ac.uk/users/gorry/course/lan-pages/mac-vendor-codes.html
BTW, it wouldn't hurt to post the MAC address you're trying to use.
Tony
-Original Message--
Paulo,
Have you followed the instructions on the wiki? They can be found at:
http://uml.harlowhill.com/index.php/UMLNetworking
Tony
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of
> Paulo da Silva
> Sent: Friday, May 06, 2005 2:39 PM
> To: user-mode
You will find several available images (some new, some not so new) listed on
the UML wiki:
http://uml.harlowhill.com/index.php/UMLRootFilesystems
Tony
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of
> Gianni
> Sent: Friday, May 20, 2005 9:32 AM
> To:
Are you on the same network as the machine, or are you remote? If you're
remote, have you ensured that you're machines default route is still active
after you've reconfigured for bridging?
Tony
>>> Celso González <[EMAIL PROTECTED]> 05/23/05 07:31AM >>>
Hi people
I will try to explain my situ
Bill,
Have you updated the wiki to reflect this? You can find it at:
http://uml.harlowhill.com/index.php/UMLRootFilesystems
Tony
>>> William Stearns <[EMAIL PROTECTED]> 06/05/05 10:34AM >>>
Good afternoon, all,
I have a fedora core 3/i386 filesystem that seems to Work Well For
Me(tm).
I normally find it best to chroot myself in the loop-mount environment such
as:
mount -o loop /srv/vs/images/my_test.img /mnt
chroot /mnt /bin/sh
apt-get update
apt-get install .
Tony
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of
> antoine
> Sen
rn OS image. You can find these (and
a lot of other information) on the UML Wiki at:
http://uml.harlowhill.com/
http://uml.harlowhill.com/index.php/UMLRootFilesystems
Good luck. - Tony
> -Original Message-
> From: Dinesh Ahuja [mailto:[EMAIL PROTECTED]
> Sent: Saturday, June 11,
Allocate another drive. Do something like the following on the master:
dd if=/dev/zero of=disk2.img bs=512M count=1
losetup /dev/loop0 ./disk2.img
mkfs -t ext2 /dev/loop0
losetup -d /dev/loop0
../linux-kernel . ubd1=./disk2.img .
Once the UML has been launched, mount the new drive in the
Quoting Blaisorblade <[EMAIL PROTECTED]>:
And I think that distributing usable root_fs images would be of great help...
(actually, there are other sources but the site has no link to them - plus I
don't like that much cherry-picking root_fs's from people I don't trust and
putting UML's approval
Derek,
First, you don't need the ubd* devices on the host. They're useless in this
context. Second, you need to boot the UML instance by specifying the ubd
devices. For example, the following might be an acceptable permutation of
your command:
/root/uml/linux-2.6.12.3/linux ubd0=/backup/Slackware
I recently downloaded and started using kernel 2.6.15.3 with the bs2 patches
from BlaisorBlade's website. Most of my instances continued to run as
normal, however I started experiencing outages on a couple of them this
morning. Specifically, two of the instances stopped responding to network
and co
> -Original Message-
> From: Blaisorblade [mailto:[EMAIL PROTECTED]
> Sent: Monday, February 13, 2006 6:13 AM
> Subject: Re: [uml-user] Crash and stability problems with 2.6.15.3-bs2
>
>
> Could you upgrade them to 2.6.15.3-bs1 - to verify that indeed
> that's still
> safe, too?
I've done
Blaisor,
Here is the output from the last two times your script ran on a development
DNS server. The script ran successfully until last night when it segment
faulted. Interesting enough, this happened on two of our development
instances 14 minutes apart. The third instance is still running the scr
Quoting Jeff Dike <[EMAIL PROTECTED]>:
On Wed, Feb 15, 2006 at 09:08:00AM -0800, Anthony Brock wrote:
Here is the output from the last two times your script ran on a development
DNS server. The script ran successfully until last night when it segment
faulted. Interesting enough, this ha
Quoting David Lang <[EMAIL PROTECTED]>:
I also get several thousand lines of error message like the following
line_ioctl: tty0: ioctl KDGKBTYPE called
line_ioctl: tty0: ioctl KDGKBTYPE called
line_ioctl: tty0: ioctl KDGKBTYPE called
line_ioctl: tty0: ioctl KDGKBTYPE called
line_ioctl: tty0: ioct
Try adding the MAC to your command line. Something like:
# Start the UML
kernel
ubd0=root_fs \
con0=fd:0,fd:1 \
eth0=tuntap,$IF,fe:fd:xx:xx:xx:xx
Tony
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of
> Nic
> Sent: Friday, Mar
> On Wed, May 17, 2006 at 11:12:22AM -0600,
> Rennie deGraaf <[EMAIL PROTECTED]> wrote
> a message of 120 lines which said:
>
> > I'm trying to build a UML guest system based on Gentoo and the
> > 2.6.16.16 kernel. It seems to work, except that it always hangs on
> > shutdown at the message " *
Quoting Blaisorblade <[EMAIL PROTECTED]>:
The stacktrace suggests that too (by memory), but why it progresses till a
certain point and then becomes unable to do anything? There's something more
involved - a lock on a page, or on a swap entry (but I don't know lock on
swap entries), maybe?
I don
-Original Message-
> Nic James Ferrier <[EMAIL PROTECTED]> writes:
>
>> My second question is: can uml_switch help me make tuntap's on the fly
>> and connect them all together?
>
>
> Never mind.
>
> The crappy man page I was reading was nothing to:
>
> http://user-mode-linux.sourceforge.net
Quoting Daniel Lundberg <[EMAIL PROTECTED]>:
Is it possilbe to do an image of my UML installation and extract it
on a physical harddrive, and getting it to boot?
Depending on your Linux flavor (Fedora, Debian, etc.), it may help to
pre-install some packages that a UML instance doesn't need.
> -Original Message-
> On Tuesday 30 May 2006 20:07, Brock, Anthony - NET wrote:
> > You need to create a separate COW file (probably based of the same
> > original image) for each instance. Your customizations will then be
> > written to the COW file while preserving the base image intact.
Since nobody else has replied, comments are inline below.
> -Original Message-
> I'm trying to run about 50 UML hosts on a dual-processor (each
> dual-core) Opteron system, running 64-bit Ubuntu 6.06LTS .
In my experience, this is a LOT for one machine. Remember that each UML is
probably
-Original Message-
> DebianUM:~# mount -t vfat /dev/ubdc1 /mnt/pendrive
> mount: special device /dev/ubdc1 does not exist
>
> How can I create it???
There are several resources one the Internet that would tell you how to do
this. However, the short answer is something like the following sc
> -Original Message-
> Just to make sure I understand, the patch posted above is for
> kernel 2.6.23 and
> it is a host patch, right. If I want to patch kernel 2.6.18 (the
> kernel coming with
> Debian stable) should I use a patch for 2.6.18, for example this one:
>
> http://www.user-mode-l
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