* [uml-devel] sysreq t back traces stopped working please help
@ 2014-02-27 19:05 Boaz Harrosh
2014-02-27 19:16 ` Richard Weinberger
2014-02-27 19:22 ` Richard Weinberger
0 siblings, 2 replies; 6+ messages in thread
From: Boaz Harrosh @ 2014-02-27 19:05 UTC (permalink / raw)
To: Richard Weinberger, uml-devel
Hi Richard, uml hackers
Since some time my "echo t > /proc/sysrq-trigger" stopped producing the proper global back-traces for all Kernel threads.
All I get is:
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] ksoftirqd/0 3 58344.325336 124146 120 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] kworker/0:0H 5 3160.151405 5 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] khelper 7 8.451419 2 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] kdevtmpfs 8 5439.251379 169 120 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] netns 9 10.451418 2 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] writeback 37 13.451416 2 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] bioset 39 12.451417 2 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] kblockd 41 11.951416 2 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] kswapd0 66 22.451413 3 120 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] fsnotify_mark 67 1686.151405 6 120 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] deferwq 219 25.451413 2 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] jbd2/ubda-8 220 58318.325347 330 120 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] ext4-rsv-conver 221 24.951412 2 100 0 0 0.000000 0.000000
0.000000 /
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] systemd-journal 233 2254.451426 466 120 0 0 0.000000 0.000000
0.000000 /system/systemd-journald.service
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] systemd-udevd 238 426.451404 696 120 0 0 0.000000 0.000000
0.000000 /system/systemd-udevd.service
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] rsyslogd 485 447.701421 38 120 0 0 0.000000 0.000000
0.000000 /system/rsyslog.service
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] in:imuxsock 549 447.701421 221 120 0 0 0.000000 0.000000
0.000000 /system/rsyslog.service
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] in:imklog 550 447.701421 29 120 0 0 0.000000 0.000000
0.000000 /system/rsyslog.service
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] rs:main Q:Reg 551 450.701421 255 120 0 0 0.000000 0.000000
0.000000 /system/rsyslog.service
Feb 27 12:47:32 fc18-buml18 kernel: [189390.940000] systemd-logind 486 1540.451422 282 120 0 0 0.000000 0.000000
0.000000 /system/systemd-logind.service
..... etc ...
Single line statistics per thread. I'm based on "make defconfig" plus some additional "YESs".
Is there something more (new) I need to set to get this working? If not do you have a theory
or I should start bisecting?
(Using Fedora 18 um image, on Fedora 18 host 64bit both)
Thanks lots in advance
Boaz
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [uml-devel] sysreq t back traces stopped working please help
2014-02-27 19:05 [uml-devel] sysreq t back traces stopped working please help Boaz Harrosh
@ 2014-02-27 19:16 ` Richard Weinberger
2014-02-27 19:25 ` Boaz Harrosh
2014-02-27 19:22 ` Richard Weinberger
1 sibling, 1 reply; 6+ messages in thread
From: Richard Weinberger @ 2014-02-27 19:16 UTC (permalink / raw)
To: Boaz Harrosh, uml-devel
Hi!
Am 27.02.2014 20:05, schrieb Boaz Harrosh:
> Hi Richard, uml hackers
>
> Since some time my "echo t > /proc/sysrq-trigger" stopped producing the proper global back-traces for all Kernel threads.
> All I get is:
"some time" is a bit vague. Do you have more details?
Thanks,
//richard
------------------------------------------------------------------------------
Flow-based real-time traffic analytics software. Cisco certified tool.
Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer
Customize your own dashboards, set traffic alerts and generate reports.
Network behavioral analysis & security monitoring. All-in-one tool.
http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [uml-devel] sysreq t back traces stopped working please help
2014-02-27 19:16 ` Richard Weinberger
@ 2014-02-27 19:25 ` Boaz Harrosh
2014-02-27 19:52 ` Boaz Harrosh
0 siblings, 1 reply; 6+ messages in thread
From: Boaz Harrosh @ 2014-02-27 19:25 UTC (permalink / raw)
To: Richard Weinberger; +Cc: uml-devel
On 02/27/2014 09:16 PM, Richard Weinberger wrote:
> Hi!
>
> Am 27.02.2014 20:05, schrieb Boaz Harrosh:
>> Hi Richard, uml hackers
>>
>> Since some time my "echo t > /proc/sysrq-trigger" stopped producing the proper global back-traces for all Kernel threads.
>> All I get is:
>
> "some time" is a bit vague. Do you have more details?
>
OK I've found my problem Da. It all goes to con0 and not at all to /var/log/messages (Fedora)
I'll recheck my log levels I see in code KERN_INFO so i do think it should appear but I'll
recheck.
Which brings me back to my original problem with my UML setup that Fedora absolutely refuses
to use con0= as its main prompt and will only use con1= So I need to now chose what will
go to my bash console, the Kernel console output (printk(s)), or Fedora main prompt. Nothing
I tried would combine them both. Like it used to be before.
[ Here is what I use:
option 1: vmlinux con0=fd:0,fd:1 con=pts (Will only send printk, invoking console becomes read-only)
option 2: vmlinux con1=fd:0,fd:1 con=pts (invoking console becomes UML's main console RW. printk through
log file only, bad for postmortem)
I'll use option 1 for now, so thanks
Boaz
> Thanks,
> //richard
>
------------------------------------------------------------------------------
Flow-based real-time traffic analytics software. Cisco certified tool.
Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer
Customize your own dashboards, set traffic alerts and generate reports.
Network behavioral analysis & security monitoring. All-in-one tool.
http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [uml-devel] sysreq t back traces stopped working please help
2014-02-27 19:25 ` Boaz Harrosh
@ 2014-02-27 19:52 ` Boaz Harrosh
0 siblings, 0 replies; 6+ messages in thread
From: Boaz Harrosh @ 2014-02-27 19:52 UTC (permalink / raw)
To: Richard Weinberger; +Cc: uml-devel
On 02/27/2014 09:25 PM, Boaz Harrosh wrote:
> On 02/27/2014 09:16 PM, Richard Weinberger wrote:
>> Hi!
>>
>> Am 27.02.2014 20:05, schrieb Boaz Harrosh:
>>> Hi Richard, uml hackers
>>>
>>> Since some time my "echo t > /proc/sysrq-trigger" stopped producing the proper global back-traces for all Kernel threads.
>>> All I get is:
>>
>> "some time" is a bit vague. Do you have more details?
>>
>
> OK I've found my problem Da. It all goes to con0 and not at all to /var/log/messages (Fedora)
> I'll recheck my log levels I see in code KERN_INFO so i do think it should appear but I'll
> recheck.
>
OK I do not understand. I do see my KERN_DEBUG level at /var/log/messages
say from nfs.ko (dprintk) But I do not see these backtrace output at
/var/log/messages.
At con0 I see everything.
Thanks
Boaz
------------------------------------------------------------------------------
Flow-based real-time traffic analytics software. Cisco certified tool.
Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer
Customize your own dashboards, set traffic alerts and generate reports.
Network behavioral analysis & security monitoring. All-in-one tool.
http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [uml-devel] sysreq t back traces stopped working please help
2014-02-27 19:05 [uml-devel] sysreq t back traces stopped working please help Boaz Harrosh
2014-02-27 19:16 ` Richard Weinberger
@ 2014-02-27 19:22 ` Richard Weinberger
2014-02-27 19:28 ` Boaz Harrosh
1 sibling, 1 reply; 6+ messages in thread
From: Richard Weinberger @ 2014-02-27 19:22 UTC (permalink / raw)
To: Boaz Harrosh, uml-devel
Am 27.02.2014 20:05, schrieb Boaz Harrosh:
> Hi Richard, uml hackers
>
> Since some time my "echo t > /proc/sysrq-trigger" stopped producing the proper global back-traces for all Kernel threads.
> All I get is:
I have an idea, do you see this regression starting with v3.12?
Thanks,
//richard
------------------------------------------------------------------------------
Flow-based real-time traffic analytics software. Cisco certified tool.
Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer
Customize your own dashboards, set traffic alerts and generate reports.
Network behavioral analysis & security monitoring. All-in-one tool.
http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [uml-devel] sysreq t back traces stopped working please help
2014-02-27 19:22 ` Richard Weinberger
@ 2014-02-27 19:28 ` Boaz Harrosh
0 siblings, 0 replies; 6+ messages in thread
From: Boaz Harrosh @ 2014-02-27 19:28 UTC (permalink / raw)
To: Richard Weinberger; +Cc: uml-devel
On 02/27/2014 09:22 PM, Richard Weinberger wrote:
>
>
> Am 27.02.2014 20:05, schrieb Boaz Harrosh:
>> Hi Richard, uml hackers
>>
>> Since some time my "echo t > /proc/sysrq-trigger" stopped producing the proper global back-traces for all Kernel threads.
>> All I get is:
>
> I have an idea, do you see this regression starting with v3.12?
>
> Thanks,
> //richard
>
Yes. You are right since 3.12 Yes. 3.11 is like before. But please see my other mail
it has more info.
Thanks, sir
Boaz
------------------------------------------------------------------------------
Flow-based real-time traffic analytics software. Cisco certified tool.
Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer
Customize your own dashboards, set traffic alerts and generate reports.
Network behavioral analysis & security monitoring. All-in-one tool.
http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk
_______________________________________________
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-02-27 19:52 UTC | newest]
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2014-02-27 19:05 [uml-devel] sysreq t back traces stopped working please help Boaz Harrosh
2014-02-27 19:16 ` Richard Weinberger
2014-02-27 19:25 ` Boaz Harrosh
2014-02-27 19:52 ` Boaz Harrosh
2014-02-27 19:22 ` Richard Weinberger
2014-02-27 19:28 ` Boaz Harrosh
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