Bug 1099254

Summary: Kernel crash when invoking 'virt-install --host-device' to pass through a LSI SAS2308 based controller
Product: [Fedora] Fedora Reporter: Alex <abcoyle>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED INSUFFICIENT_DATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: 20CC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
Target Milestone: ---Flags: jforbes: needinfo?
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-12-10 14:58:02 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
Relevant output from /var/log/messages none

Description Alex 2014-05-19 23:16:50 UTC 
Description of problem:
When invoking 'virt-install --host-device ...' to pass through a LSI SAS2308 based controller, there is extensive output to /var/log/messages relating to the 'mpt2sas' module, indicating a kernel crash.

Version-Release number of selected component (if applicable): 
3.14.3-200.fc20 (kernel)
16.100.00.00 (mpt2sas)

How reproducible: consistently

Steps to Reproduce:
1. use 'sudo virsh nodedev-list --tree' to identify the controller device
2. use 'sudo virt-install --host-device <device-id> --location Fedora-20-x86_64-netinst.iso ...' to create and launch a new Fedora 20 guest VM

Actual results:
Extensive output to /var/log/messages relating to the 'mpt2sas' module, indicating a kernel crash. The system then automatically reboots. I have attached the relevant output from /var/log/messages

Expected results:
VM guest starts successfully.

Additional info:
- Have tried passing 'pci=nomsi' to the host kernel, result: network interface devices disappear from the host.
- Have tried passing 'pci=nomsi' to the guest kernel using --extra-args, result: same kernel crash.
- Have tried passing 'options mpt2sas msix_disable=1' via /etc/modprobe.d/mpt2sas.conf, and re-generating initrd using dracut, result: same kernel crash.
Comment 1 Alex 2014-05-19 23:18:00 UTC 
Created attachment 897351 [details]
Relevant output from /var/log/messages
Comment 2 Alex 2014-06-17 19:41:23 UTC 
Interestingly, the problem goes away if I use the debug kernel (provided by the 'kernel-debug' package). What is the difference in the debug kernel that prevents the crash from occurring?
Comment 3 Alex 2014-06-20 23:01:11 UTC 
I found another (possibly more preferable) workaround, compared to using the debug kernel: the problem also goes away if I disable "Pass-through DMA Support" in the BIOS (listed under "Intel VT for Directed I/O" on the "Processor Configuration" screen, with an Intel S1200V3RPL server board). 

However, I have no idea of whether there is any performance impact or other undesirable effect when disabling this option in the BIOS?
Comment 4 Justin M. Forbes 2014-11-13 15:56:53 UTC 
*********** MASS BUG UPDATE **************

We apologize for the inconvenience.  There is a large number of bugs to go through and several of them have gone stale.  Due to this, we are doing a mass bug update across all of the Fedora 20 kernel bugs.

Fedora 20 has now been rebased to 3.17.2-200.fc20.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.

If you have moved on to Fedora 21, and are still experiencing this issue, please change the version to Fedora 21.

If you experience different issues, please open a new bug report for those.
Comment 5 Justin M. Forbes 2014-12-10 14:58:02 UTC 
This bug is being closed with INSUFFICIENT_DATA as there has not been a response in over 3 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously.