| --- | Log | opened Fri Jan 18 00:00:04 2008 |
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| 10:47 | <jdike:#uml> | Hi guys |
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| 16:34 | <anderiv:#uml> | jdike: so - I upgraded four of my UMLs yesterday from 2.6.22.7 to 2.6.23.14. Today, after getting reports from users that their servers were performing poorly, I started investigating, and found that all of them has /sbin/getty processes pegging the CPU. I stepped back to the old UML kernel version and the problem went away... |
| 16:35 | <anderiv:#uml> | whoops - meant to address that to the whole channel, not just jdike |
| 16:43 | <jdike:#uml> | you did |
| 16:44 | <jdike:#uml> | can you strace the gettys and see what they are doing? |
| 16:45 | <anderiv:#uml> | can you attach strace to an already-running process? |
| 16:46 | <jdike:#uml> | yup |
| 16:47 | <jdike:#uml> | strace -p <pid> |
| 16:48 | <anderiv:#uml> | jdike: http://pastebin.com/m1e0586c6 |
| 16:49 | <jdike:#uml> | that's just an exit |
| 16:49 | <jdike:#uml> | show me a ps uax |
| 16:49 | <jdike:#uml> | and a strace of a spinning process |
| 16:51 | <jdike:#uml> | and if you're getting gettys just starting and exiting, we need to think of some other way of looking at this |
| 16:52 | <anderiv:#uml> | I believe you're right - theire short-lived. |
| 16:52 | <anderiv:#uml> | jdike: ps aux: http://pastebin.com/d418a7a87 |
| 16:54 | <jdike:#uml> | showing up as sleeping though |
| 16:54 | <jdike:#uml> | can you try stracing some a few more time and see if you can get more than an exit? |
| 16:54 | <anderiv:#uml> | yep |
| 16:54 | <anderiv:#uml> | I'm watching top now so I can grab it at the right time |
| 16:55 | <anderiv:#uml> | ugh - I'm missing it every time |
| 16:56 | <jdike:#uml> | pity init can't be straced |
| 16:57 | <jdike:#uml> | nothing showing up on the console or in messages? |
| 16:58 | <anderiv:#uml> | hrm - interesting. |
| 16:58 | <anderiv:#uml> | one sec... |
| 16:59 | <anderiv:#uml> | I'm getting a lot of these on the console: http://pastebin.com/m791fbbb4 . I was getting those before, but they never effected the CPU. Upon inital examination, there appears to be some correlation between when the CPU spikes and when these messages show up. |
| 17:00 | <jdike:#uml> | what's your command line? |
| 17:03 | <anderiv:#uml> | it's: ./kernel32-2.6.23.14 ubd0=./lpduml02-root_fs mem=1024 ubdb=uml_swap umid=lpduml02 eth0=tuntap,lpduml01 |
| 17:04 | <jdike:#uml> | add "con=pts con0=fd:0,fd:1 con1=none" |
| 17:05 | <anderiv:#uml> | alright...will have to test that later, as I can't shut this server down yet. |
| 17:05 | <anderiv:#uml> | I'll let you know how it goes - thanks Jeff. |
| 17:05 | <jdike:#uml> | np |
| 17:06 | <jdike:#uml> | you can do it on the fly, BTW |
| 17:07 | <jdike:#uml> | and you can just disable those consoles in inittab since they're useless anyway |
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| --- | Log | closed Sat Jan 19 00:00:37 2008 |
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