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Old 07-14-2008, 08:49 PM
"Jerry Amundson"
 
Default Need kernel-debuginfo-2.6.9-67.0.20.EL.x86_64.rpm

Short story:
Would it be possible to get
kernel-debuginfo-2.6.9-67.0.20.EL.x86_64.rpm on di.c.o?
I have a need to run crash on a 2.6.9-67.0.20.ELxenU xm dump-core.

Long story:
Two Dell 6950 (now called R905, 4 Dual-Core AMD Opteron 8200 series)
heartbeat/drbd nodes running the stock CentOS 5.2 Dom0. The domU's are
the only resources in heartbeat.

Dom1 is a perfectly running, updated, CentOS 5.2 Apache/MySQL/Samba
server (2.6.18-92.1.6.el5xen). It's xen config:
name = "guinan"
bootloader = "/usr/bin/pygrub"
uuid = "8fa0ac9e-fe28-17f5-6a72-07f84b4daa24"
memory = 4097
vcpus = 6
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
vfb = [ "type=vnc,vncunused=1,keymap=en-us" ]
disk = [ "phy:/dev/drbd1,xvda,w", "phy:/dev/drbd2,xvdb,w" ]
vif = [ "mac=00:16:3e:68:16:5d,bridge=xenbr0", "bridge=xenbr1" ]

Dom2 is a CentOS 4.6 software development and database server
(2.6.9-67.0.20.ELxenU). Every so often, could be several hours or
several days, it just hangs, locks up, becomes unresponsive. Nothing
to the console. Nothing logged. When it gets to this point, the only
recourse is an xm destroy. It's occurred with every combination of
Dom0/DomU. The hardware of both servers checks out OK. The only sign
of life, on Dom2's current Dom0, xentop shows CPU usage, and at a high
percent, at that:
xentop - 12:02:36 Xen 3.1.2-92.1.6.el5
2 domains: 2 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
Mem: 16775712k total, 11629904k used, 5145808k free CPUs: 8 @ 2194MHz
NAME STATE CPU(sec) CPU(%) MEM(k) MEM(%) MAXMEM(k)
MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS VBD_OO VBD_RD VBD_WR
SSID
Domain-0 -----r 50891 1.5 901352 5.4 no limit
n/a 8 4 17720114 18765713 0 0 0 0 0
monolith -----r 965342 599.2 10486632 62.5 10486784
62.5 6 2 332672635 30178285 2 0 15805538 60805435
0

I've experimented with various xen config's. Currently it's this:
name = "monolith"
uuid = "283746fa-c708-cfa0-f5df-cad6abea568e"
memory = 10241
vcpus = 4
bootloader = "/usr/bin/pygrub"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
vfb = [ "type=vnc,vncunused=1,keymap=en-us" ]
disk = [ "phy:/dev/drbd3,xvda,w", "phy:/dev/drbd4,xvdb,w" ]
vif = [ "mac=00:16:3e:08:8d:c3,bridge=xenbr0", "bridge=xenbr1" ]

Previously, I'd tried adjusting memory, but the problem resurfaced.
Currently, I've gone from 6 vcpus to the 4 shown above in the hopes
that stabilizes it.

I'm at wits end. I've committed these machines to production status,
so this instability has everyone kind of on edge, and wanting to go
back to bare metal...

jerry

--
"Your life is trite and jaded, boring and confiscated." - Twisted Sister
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CentOS-devel@centos.org
http://lists.centos.org/mailman/listinfo/centos-devel
 
Old 07-14-2008, 11:08 PM
Johnny Hughes
 
Default Need kernel-debuginfo-2.6.9-67.0.20.EL.x86_64.rpm

Jerry Amundson wrote:

Short story:
Would it be possible to get
kernel-debuginfo-2.6.9-67.0.20.EL.x86_64.rpm on di.c.o?


Yes,

I have pushed the c4 debuginfo files there. I am pushing the c5
debuginfo files now.


Thanks,
Johnny Hughes

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CentOS-devel mailing list
CentOS-devel@centos.org
http://lists.centos.org/mailman/listinfo/centos-devel
 
Old 07-15-2008, 07:23 PM
"Jerry Amundson"
 
Default Need kernel-debuginfo-2.6.9-67.0.20.EL.x86_64.rpm

On Mon, Jul 14, 2008 at 3:49 PM, Jerry Amundson <jamundso@gmail.com> wrote:
> Two Dell 6950 (now called R905, 4 Dual-Core AMD Opteron 8200 series)
> heartbeat/drbd nodes running the stock CentOS 5.2 Dom0. The domU's are
> the only resources in heartbeat.
> Dom1 is a perfectly running, updated, CentOS 5.2 Apache/MySQL/Samba
> Dom2 is a CentOS 4.6 software development and database server

So crash tells me that Dom2 gets to this point:
SYSTEM MAP: System.map-2.6.9-67.0.20.ELxenU
DEBUG KERNEL: /usr/lib/debug/lib/modules/2.6.9-67.0.20.ELxenU/vmlinux
(2.6.9-67.0.20.ELxenU)
DUMPFILE: /public/IntSys/tmp/m1.dmp
CPUS: 6
DATE: Mon Jul 14 11:53:59 2008
UPTIME: 6 days, 11:39:33
LOAD AVERAGE: 548.07, 542.95, 434.99
TASKS: 2721
NODENAME: monolith
RELEASE: 2.6.9-67.0.20.ELxenU
VERSION: #1 SMP Thu Jun 26 08:36:44 EDT 2008
MACHINE: x86_64 (2194 Mhz)
MEMORY: 10 GB
PANIC: ""
PID: 0
COMMAND: "swapper"
TASK: ffffffff80322b40 (1 of 6) [THREAD_INFO: ffffffff80426000]
CPU: 0
STATE: TASK_RUNNING
WARNING: panic task not found

crash> bt
PID: 0 TASK: ffffffff80322b40 CPU: 0 COMMAND: "swapper"
#0 [ffffffff80427ec0] schedule at ffffffff80294d9a
#1 [ffffffff80427f98] cpu_idle at ffffffff8010b85d
crash> kmem -i
PAGES TOTAL PERCENTAGE
TOTAL MEM 2621696 10 GB ----
FREE 8884 34.7 MB 0% of TOTAL MEM
USED 2612812 10 GB 99% of TOTAL MEM
SHARED 0 0 0% of TOTAL MEM
BUFFERS 59585 232.8 MB 2% of TOTAL MEM
CACHED 1325825 5.1 GB 50% of TOTAL MEM
SLAB 358565 1.4 GB 13% of TOTAL MEM

TOTAL HIGH 0 0 0% of TOTAL MEM
FREE HIGH 0 0 0% of TOTAL HIGH
TOTAL LOW 2621696 10 GB 100% of TOTAL MEM
FREE LOW 8884 34.7 MB 0% of TOTAL LOW

kmem: swap_info[0].swap_map at ffffff00001ea000 is unaccessible

So I see where the DomU is, but how did it get there? Can I find out
from crash, or do I need something "real-time" within the DomU? Of
course, searching has given me nothing to go on, hence this post, but
I'll continue...

jerry

--
"Your life is trite and jaded, boring and confiscated." - Twisted Sister
_______________________________________________
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http://lists.centos.org/mailman/listinfo/centos-devel
 

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