Bug 923102 - crash in intel_pstate_timer_func on virtualization
Summary: crash in intel_pstate_timer_func on virtualization
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 19
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2013-03-19 08:21 UTC by Tomasz Torcz
Modified: 2013-03-21 14:51 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-03-21 14:51:26 UTC
Type: Bug

Attachments (Terms of Use)
intel_pstate_timer_func-rc3.png (49.66 KB, image/png)
2013-03-19 08:21 UTC, Tomasz Torcz
no flags Details
photo of the trace with 3.9.0-0.rc3.git0.5.fc20.x86_64 (975.27 KB, image/jpeg)
2013-03-20 20:19 UTC, Adam Williamson
no flags Details

Description Tomasz Torcz 2013-03-19 08:21:41 UTC
Created attachment 712474 [details]

Description of problem:
When running guest in VirtulBox 4.2.10, kernel crashes on boot. See screenshot for backtrace.

Version-Release number of selected component (if applicable):

Additional info:
booting is possible only with "intel_pstate=disable"

Comment 1 Dirk Brandewie 2013-03-19 16:17:55 UTC
Please try the patch attatched to bug

Comment 2 Dave Jones 2013-03-19 18:51:22 UTC
*** Bug 920289 has been marked as a duplicate of this bug. ***

Comment 3 Dave Jones 2013-03-20 17:35:41 UTC
can you try kernel-3.9.0-0.rc3.git0.4.fc19  (without the disable option)

Comment 4 Adam Williamson 2013-03-20 20:17:40 UTC
So I posted in my dupe that this had stopped happening to me, but over the last day or two it (or something like it) has started happening again - if anything more frequently. It's happened three times since last night, twice this morning. I think that ties up with the new kernel Dave mentions, in fact...yeah, looks like I got rc3.git0.5.fc20 (I'm using rawhide-nodebug repo) installed yesterday morning, and would've rebooted into it later that day, then I started seeing freezes again. Twice it was just a freeze at desktop, no trace, but once I got a picture of the trace, will attach.

Comment 5 Adam Williamson 2013-03-20 20:19:05 UTC
Created attachment 713458 [details]
photo of the trace with 3.9.0-0.rc3.git0.5.fc20.x86_64

Comment 6 Dirk Brandewie 2013-03-20 20:33:36 UTC
So something very strange is going on here.  I see pid_param_set() on the stack if the stack trace is accurate then something is diddling the debugfs files for the driver which you should do at your own peril :-)

Is there anyway to capture the beging of the stack trace?

Any thing special happening on the system prior to the freeze?

Comment 7 Adam Williamson 2013-03-20 20:55:34 UTC
Huh. No idea what's going on, but it's exploding on me with regularity now. I booted back to rc3.git3 and it exploded in less than an hour. I can't get anything done like this, I'll have to disable pstate...

Comment 8 Ma Hsiao-chun 2013-03-21 01:47:07 UTC
This probably affects some recent GNOME testing images:

I cannot run GNOME-3.7.92.iso at this point.

Comment 9 Adam Williamson 2013-03-21 02:14:19 UTC
Ma: try "intel_pstate=disable" on the cmdline.

Comment 10 Tomasz Torcz 2013-03-21 08:00:08 UTC
Knocking on wood, my original problem seems to be fixed:
# hostnamectl  | egrep  "Virt|Kernel"
    Virtualization: oracle
            Kernel: Linux 3.9.0-0.rc3.git0.4.fc19.x86_64

Comment 11 Dave Jones 2013-03-21 14:48:25 UTC
ok, sounds like Adam is seeing a different bug after all. Let's undupe this, and close this one out as it works for Tomasz.

Adam, I'll have a new debug build later today.

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