Re: [Crash-utility] linux_banner has garbage
----- Original Message -----
Hello Dave,
I got a kernel freeze yesterday and am able to successfully open the memory
image using crash utility.
crash> sys
KERNEL: ./usr/lib/debug/usr/lib/modules/4.14.19-coreos/vmlinux
DUMPFILE: gt-Server02-gmt-612746ca.vmss
CPUS: 70
DATE: Wed Feb 21 14:53:20 2018
UPTIME: 1 days, 11:52:25
LOAD AVERAGE: 70.70, 30.98, 12.88
TASKS: 2312
NODENAME: gt-Server02-gmt.com
RELEASE: 4.14.19-coreos
VERSION: #1 SMP Wed Feb 14 03:18:05 UTC 2018
MACHINE: x86_64 (2094 Mhz)
MEMORY: 60 GB
PANIC: ""
crash>
Could you please guide me about couple of things I should check in case of
a kernel freeze before diving in deep to find the root cause ?
I'm not sure what you mean by a "kernel freeze", but typically something
would complain about a hard or soft lockup in the system log. So I would
first run "log" to see if there's anything of interest. Run "bt
-a" on
the active tasks to see if the active tasks are contesting for something,
or work your way through "foreach bt" to see what the tasks of interest are
doing/waiting on. It would seem that some task has taken control of something,
a lock, or counter, or whatever, and many other tasks have blocked waiting
for its release. So there's probably a common theme among the blocked tasks
that might give you a clue.
Dave