> Since somebody (maybe Christopher Aker) said that parallel make was broken in
> 2.6.10-rc, I'm asking to report it in detail, if the complaint is correct.
Odd.. "make ARCH=um -jN" works, but "make -jN ARCH=um" doesn't. How did I miss
that?
-Chris
---
A little more info...
My method for causing the problem every time (example works under 2.6.9-ck3 and
2.6.10-rc2-bk7)
# mount tmpfs tmp/ -t tmpfs
# TMPDIR=./tmp/ /kernels/non-fix-kill-patched-kernel rootfs=debian.fs
# uml_mconsole .uml/xxx/mconsole cad
# kill -KILL
# umount tmp/
umount: /root/t
I'm still seeing the "unable to unmount tmpfs" problem like we had before the
fix-kill patch. All my UMLs have the fix-kill fixes, and yet under some
circumstances (yet unknown), the host kernel refuses to unmount the tmpfs mount
that
a UML had used for its VM file.
It's happening under a number
> Well, this is yet undiagnosed, but definitely it's not a UML bug... you should
> certainly run a 2.6.8.1 based kernel...
That is unfortunate.
> There is some kind of security bug fixed in 2.6.9, but it was a littler one
> probably (an overflow when handling file position...).
>
> Do you remembe
You need to run 2.6.10, as it doesn't exhibit the tmpfs filling up
problem like 2.6.9 variants do. The tmpfs problem is also compounded
by the fact that UMLs without the fix-kill patch don't exit properly,
but the 2.6.9-bb4 patchset has the fix for UML.
For 2.4-um, you can find the fix-kill pa
> That's supposed to be a 2.6.10 _Host_-Kernel? (Not 2.6.10 UM-Kernel?)
Correct.
>> The tmpfs problem is also
>> compounded by the fact that UMLs without the fix-kill patch don't
>> exit properly, but the 2.6.9-bb4 patchset has the fix for UML.
> You say UM-Kernel 2.6.9-bb4 has that fix? (Yes,
> Hmm, it's not reproducable here, I can umount tmpfs after running
> uml just fine. Any other conditions are needed to trigger it?
>
> Gerd
Here's a post of mine which details a sure fire way to reproduce it every time
http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=110324354001225&w
I've had reports of this crash from a user who says he experiences this crash
several
times a day. I'm not sure if this is related to another crash which produces no
console output that I've been chasing for a few weeks, or if this is even
related to
UML or a bug in x86.
Host: 2.6.10 w/ SKAS-v7
> > I believe we've figured out that this is skas3 specific. Once you start
> > ping-flooding the UML, it crashes within a second.
> I wasn't able to riproduce it... I ran two instances of the above loop + a
> ping flood from the host, but it didn't crash UML, even after letting it that
> way for
> The fix is obvious:
>
> Index: 2.6.10/arch/um/kernel/skas/process.c
> ===
> --- 2.6.10.orig/arch/um/kernel/skas/process.c 2005-01-12 11:17:22.0
> -0500
> +++ 2.6.10/arch/um/kernel/skas/process.c 2005-01-12 11:18:03.0
I just verified this on a Debian install and an FC2 install.
Moving from 2.6.9-bb4 to 2.6.10-um vanilla, top reports either 100% user, or
100%
idle.
[2.6.10] # cat /proc/stat
cpu 645 1 0 0 0 0 0
cpu0 645 1 0 0 0 0 0
intr 63462 54820 0 174 10 8270 93 0 0 0 0 1 94 0 0
ctxt 108849
btime 1105659428
> Try retesting after applying update-process-times.patch (the one for the
> crash
> you were seeing): that patch was not merged by maintainers in mainline,
> though IIRC it was sent in the right time frame (maybe because they weren't
> marked as urgent, or because they were a lot of patches, w
With the problems we had with 2.6.9 as a host, I was wondering why Blaisorblade
chose
it when he released skas-v8-rc1.
Here is skas-v8-rc1 diffed against 2.6.10:
http://www.theshore.net/~caker/patches/skas-v8-rc1-2.6.10.patch
-Chris
---
Thi
FYI: Been testing this pretty heavily. Seems great -- decided to move it into
production yesterday. It's now running on 10 hosts, and I'm happy to report
all is
well.
I just rolled a 2.6.11-rc4+cfq-ts-21 host kernel and I'll be testing this today.
Thanks!
-Chris
> I just rolled a 2.6.11-rc4+cfq-ts-21 host kernel and I'll be testing this
> today.
2.6.11 doesn't seem to be ready for host duty yet:
[EMAIL PROTECTED] root]# uname -a
Linux host27.linode.com 2.6.11-rc4-1-bigmem64 #1 SMP Mon Feb 14 15:55:09 EST
2005
i686 i686 i386 GNU/Linux
[EMAIL
> > [EMAIL PROTECTED] root]# /vbin/kernel/2.6.11-rc3-mm2-aio
> > Checking for /proc/mm...found
> > Checking for the skas3 patch in the host...found
> > Checking PROT_EXEC mmap in /tmp...OK
>
> Does this have my exception-table patch in it?
>
> Jeff
Yes. This is the same UML kernel I had trouble w
> Yes. There is a bug in the v8-rc2 patch for 2.6.11
> Try the attached fix, please.
I now have a few hosts running 2.6.11-rc4 with the fix you posted. It's been
working
great.
Thanks!
-Chris
---
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Has the constant "loadavg of 1" bug been resolved, or has the patch been
accepted
into 2.6.12?
Blaisorblade -- it appears to be back. My recent tests with 2.6.11 vanilla
still
exhibit this problem.
-Chris
---
This SF.Net email is sponsored
> Has the constant "loadavg of 1" bug been resolved, or has the patch been
> accepted
> into 2.6.12?
>
> Blaisorblade -- it appears to be back. My recent tests with 2.6.11 vanilla
> still
> exhibit this problem.
It appears as though uml-fix-update_process_times-call.patch fixes the values in
/p
> It's really strange, I'll have to ask on LKML. However, a question: does it
> show up also on 2.6.10 or not?
Yes, it started with 2.6.10. Fine in 2.6.9.
-Chris
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Get your fingers limb
Jeff Dike wrote:
Testing and feedback are welcome.
Looks good here!
Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 100.0% id, 0.0% wa, 0.0% hi,
0.0% si
Thanks,
-Chris
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fr
Peter wrote:
Hi.
We tried 2.6.12.3-skas3-v8.2 on a host server. It kernel paniced (could
not capture the panic) after about 90 minutes. I'd tried a 2.6.12
skasv8.2 a week or so back on another server and got the same result.
I had a similar problem a few weeks back when I attempted to run
For many months now, I've been dealing with host machine instability.
Essentially, I'm rebooting at least one host a week (see
http://www.linode.com/forums/viewforum.php?f=25 for details). The
affected machines are all running a kernel patched with skas3 at least
version 8. Only my more recen
Found this from in my remote syslog:
Unable to handle kernel paging request at virtual address 2000
printing eip:
*pde = 2a771001
Oops: [#1]
SMP
Modules linked in:
CPU:2
EIP:0200:[<>]Not tainted VLI
EFLAGS: 00010292 (2.6.11.11-1-bigmem)
EIP is at 0x0
eax:
Perhaps this is related. I've upgraded one of the affected machines to
2.6.13-rc6. We'll see how it goes...
http://marc.theaimsgroup.com/?t=11172064042&r=1&w=2
-Chris
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Peter wrote:
> Hi. I just got this kernel dump on one particular host server that has
> been giving me some grief - it has paniced 3 times over the last month.
>
> Would anyone on the list care to take a guess whether this looks like a
> hardware, skas or vanilla kernel problem. Any recommendati
Blaisorblade wrote:
Ok, I'm particularly suspicious of one patch, ptrace_ldt-reload-smp-fix, try
unapplying that one. I don't know exactly *how* it might trigger that crash,
but it seems a data corruption, and that code is doing exactly that.
I recompiled 2.6.12.5 with skas-v8 minus the ptrace
2.6.13.3-um
# echo 0 > /proc/sysemu
Kernel panic - not syncing: handle_trap - failed to wait at end of
syscall, errno = 0, status = 2943
EIP: 0073:[<40129e18>] CPU: 0 Not tainted ESP: 007b:bfa14f6c EFLAGS:
0246
Not tainted
EAX: ffda EBX: 0001 ECX: 080e8c08 EDX: 0002
ESI
Blaisorblade wrote:
On Thursday 06 October 2005 08:08, Christopher S. Aker wrote:
2.6.13.3-um
Which host, and which guest mode (SKAS0 vs. SKAS3)?
2.6.7 with the skas patch right before the strace bug was fixed (like,
2.6.7-skas3-v4?) It's ancient, and most likely contributes to this
Has there been any progress on the race in SKAS? I've been dealing with
2-4 hosts crashing a week. Same thing happens on my old SKAS kernel,
2.6.7 with skas3-v4 or so.
From:
http://marc.theaimsgroup.com/?t=11237698132&r=1&w=2
Unable to handle kernel paging request at virtual address
Christopher S. Aker wrote:
Has there been any progress on the race in SKAS? I've been dealing with
2-4 hosts crashing a week. Same thing happens on my old SKAS kernel,
2.6.7 with skas3-v4 or so.
Jeff and I realized that this only happens on Xeon processors where the
model number i
/proc/cpuinfo -- model 3
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 3
model name : Intel(R) Xeon(TM) CPU 2.80GHz
stepping: 4
cpu MHz : 2801.996
cache size : 1024 KB
physical id : 0
siblings: 2
fdiv_bug: no
Blaisorblade wrote:
After some researches, it seems that the matching errata document is this one:
http://www.intel.com/design/xeon/specupdt/302402.htm
which would imply you have a 64-bit enabled processor...
Note 1: that's not the only document matching, but the other is for 64-bit
processo
Peter wrote:
I have skas3-v8 host servers with model 4 processes and good (100+ day)
uptimes. The host server I had issues with (host38) got converted to
Xen and is still having problems. I am seeing issues with host34 that
require the odd restart. That server runs the same CPU model and ker
Jeff Dike wrote:
I've put my FC4 image online at
http://www.user-mode-linux.org/~jdike/root_fs.2005062201.bz2
It requires my full patchset in order to boot, especially the NPTL patches,
which, aside from some obvious nastinesses, seem to work.
As of today, it's fully updated,
Thanks to Bill
I've got a user requesting CONFIG_SND_DUMMY support in UML. Is this
just a hack to UML's config system, or would there be more to it?
Thanks,
-Chris
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I'm posting this for posterity. I've asked the user to upgrade to
2.6.16.1-bs1 for now. He's hit this twice in the last month...
http://www.theshore.net/~caker/uml/kernels/2.6.15-linode16
Kernel panic - not syncing: Kernel mode signal 7
EIP: 0073:[<8038d4f1>] CPU: 0 Not tainted ESP: 007b:b7f
Blaisorblade wrote:
On Saturday 01 April 2006 00:08, Christopher S. Aker wrote:
I'm posting this for posterity. I've asked the user to upgrade to
2.6.16.1-bs1 for now. He's hit this twice in the last month...
http://www.theshore.net/~caker/uml/kernels/2.6.15-linode16
Ker
2.6.16 + bb1
Kernel panic - not syncing: Kernel mode fault at addr 0x8780, ip
0x47b0
EIP: 0073:[<47b0>] CPU: 0 Not tainted ESP: 007b:bfe19380 EFLAGS:
0212
Not tainted
EAX: EBX: ECX: EDX:
ESI: EDI: EBP: DS: 007
Jeff Dike wrote:
On Wed, May 10, 2006 at 03:08:18AM -0500, Christopher S. Aker wrote:
2.6.16 + bb1
Kernel panic - not syncing: Kernel mode fault at addr 0x8780, ip
0x47b0
EIP: 0073:[<47b0>] CPU: 0 Not tainted ESP: 007b:bfe19380 EFLAGS:
0212
Not tainted
EAX: 00
[EMAIL PROTECTED]:~ # uname -a
Linux none 2.6.17-linode20 #1 Sun Jun 18 00:04:18 EDT 2006 i686 GNU/Linux
[EMAIL PROTECTED]:~ # uptime
23:37:50 up 14663 days, 20:54, 1 user, load average: 0.00, 0.00, 0.00
[EMAIL PROTECTED]:~ # cat /proc/uptime
1266958484.15 69449.04
-Chris
___
Christopher S. Aker wrote:
> [EMAIL PROTECTED]:~ # uname -a
> Linux none 2.6.17-linode20 #1 Sun Jun 18 00:04:18 EDT 2006 i686 GNU/Linux
> [EMAIL PROTECTED]:~ # uptime
> 23:37:50 up 14663 days, 20:54, 1 user, load average: 0.00, 0.00, 0.00
> [EMAIL PROTECTED]:~ # c
Blaisorblade,
I recently deployed a 2.6.18-skas3-v9-pre9 host, and some users weren't
able to boot UML beyond "VFS: Mounted root (ext3 filesystem) readonly".
As it turns out, only 2.6-um kernels were affected, 2.4-um worked fine.
This happened both in skas3 and skas0 modes. Jeff graciously t
Blaisorblade wrote:
> On Thursday 05 October 2006 23:59, Christopher S. Aker wrote:
>> Blaisorblade,
>>
>> I recently deployed a 2.6.18-skas3-v9-pre9 host, and some users weren't
>> able to boot UML beyond "VFS: Mounted root (ext3 filesystem) readonly".
This is 2.6.18-um, on top of a 2.6.16.29-skas3-v8.2 host.
Kernel file is here:
http://www.theshore.net/~caker/uml/kernels/2.6.18-linode25
Kernel panic - not syncing: Kernel mode fault at addr 0x92c0, ip
0x80bcead
EIP: 0073:[<080bcead>] CPU: 0 Not tainted ESP: 007b:bf55b798 EFLAGS:
0020024
Blaisorblade wrote:
> On Friday 13 October 2006 22:07, Jeff Dike wrote:
>> On Tue, Oct 10, 2006 at 06:17:06PM -0500, Christopher S. Aker wrote:
>>> This is 2.6.18-um, on top of a 2.6.16.29-skas3-v8.2 host.
>>>
>>> Kernel file is here:
>>> http://www.th
Blaisorblade wrote:
> Which is the cmd line? With how much memory where these instances started?
Kernel command line: mem=300M fake_ide fakehd con=null con0=fd:0,fd:1
devfs=nomount root=/dev/ubda ubda= 7 ubdb=
eth0=tuntap,encode1_0,fe:fd:46:55:81:95 token_max=40 token_refill=512
> Ok, Jeff,
Blaisorblade,
Any chance you'll be creating a skas v8.2 patch for 2.6.19/20 any time
soon? I'm still weary of this issue with skas-v9pre:
http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=116008558424368&w=2
Would it be as simple as taking the broken-out skas-v9 patch for 2.6.19
and onl
Blaisorblade wrote:
> On Thursday 05 October 2006 23:59, Christopher S. Aker wrote:
>> Blaisorblade,
>>
>> I recently deployed a 2.6.18-skas3-v9-pre9 host, and some users weren't
>> able to boot UML beyond "VFS: Mounted root (ext3 filesystem) readonly".
Christopher S. Aker wrote:
> Blaisorblade wrote:
>> An important question: you reverted to a 2.6.18 + skas kernel or a 2.6.17
>> one?
>> A similar bug is being discussed about a regression in 2.6.18 vanilla...
> All my hosts are running at most 2.6.16.x, so t
Blaisorblade wrote:
[snip]
> Without any errors, after these messages:
>
> kjournald starting. Commit interval 5 seconds
> EXT3-fs: mounted filesystem with ordered data mode.
> VFS: Mounted root (ext3 filesystem) readonly.
>
> it hangs giving the following result at strace -p (I've printed two
2.6.22.6-um
init_new_context_skas - new_mm failed, errno = -24
init_new_context_skas - new_mm failed, errno = -24
init_new_context_skas - new_mm failed, errno = -24
Kernel panic - not syncing: switch_mm_skas - PTRACE_SWITCH_MM failed,
errno = 9
EIP: :[<>] CPU: 0 Not tainted EFLAGS:
2.6.21.1-um
Mem-info:
Normal per-cpu:
CPU 0: Hot: hi: 90, btch: 15 usd: 14 Cold: hi: 30, btch: 7 usd: 24
Active:62085 inactive:6442 dirty:4693 writeback:2791 unstable:0
free:196 slab:3980 mapped:12235 pagetables:241 bounce:0
Normal free:784kB min:2208kB low:2760kB high:3312kB active:248340kB
inac
Jeff Dike wrote:
> On Thu, Sep 06, 2007 at 11:08:44AM -0400, Christopher S. Aker wrote:
>> 2.6.21.1-um
>>
>> Mem-info:
>> Normal per-cpu:
>> CPU 0: Hot: hi: 90, btch: 15 usd: 14 Cold: hi: 30, btch: 7 usd: 24
>> Active:62085 inactive:6442 dirty:4693 writebac
Jeff Dike wrote:
> On Thu, Sep 06, 2007 at 11:03:52AM -0400, Christopher S. Aker wrote:
>> 2.6.22.6-um
>>
>> init_new_context_skas - new_mm failed, errno = -24
>> init_new_context_skas - new_mm failed, errno = -24
>> init_new_context_skas - new_mm failed, errno =
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