Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.
First Last Prev Next    This bug is not in your last search results.
Bug 683783 - guest kernel panic when boot with nmi_watchdog=1 [rhel-6.0.z]
guest kernel panic when boot with nmi_watchdog=1 [rhel-6.0.z]
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel (Show other bugs)
6.1
All Linux
low Severity medium
: rc
: ---
Assigned To: Frantisek Hrbata
Red Hat Kernel QE team
: Reopened, RHELNAK, ZStream
Depends On: 616296
Blocks:
  Show dependency tree / graph
 
Reported: 2011-03-10 06:34 EST by RHEL Product and Program Management
Modified: 2013-01-10 22:51 EST (History)
16 users (show)

See Also:
Fixed In Version: kernel-2.6.32-71.20.1.el6
Doc Type: Bug Fix
Doc Text:
While not mandated by any specification, Linux systems rely on NMIs (Non-maskable Interrupts) being blocked by an IF-enabling (Interrupt Flag) STI instruction (an x86 instruction that enables interrupts; Set Interrupts); this is also the common behavior of all known hardware. Prior to this update, kernel panic could occur on guests using NMIs extensively (for example, a Linux system with the nmi_watchdog kernel parameter enabled). With this update, an NMI is disallowed when interrupts are blocked by an STI. This is done by checking for the condition and requesting an interrupt window exit if it occurs. As a result, kernel panic no longer occurs.
Story Points: ---
Clone Of:
Environment:
Last Closed: 2011-04-07 22:59:55 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Add an attachment (proposed patch, testcase, etc.)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0421 normal SHIPPED_LIVE Important: kernel security and bug fix update 2011-04-07 22:56:45 EDT

  None (edit)
Description RHEL Product and Program Management 2011-03-10 06:34:04 EST 
This bug has been copied from bug #616296 and has been proposed
to be backported to 6.0 z-stream (EUS).
Comment 4 Mike Cao 2011-04-01 08:27:01 EDT 
Verified on kernel-2.6.32-71.24.1.el6

Referring bug #616296 ,this issue only fixed on Intel host

steps:
1.install a rhel5.6 guest
2.append nmi_watchdog=1 in guest cli
3.reboot guest 200 times


Actual Results:
no kernel panic occures

based on above ,this issue has been fixed .change status to VERIFIED.
Comment 5 errata-xmlrpc 2011-04-07 22:59:55 EDT 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0421.html
Comment 6 Martin Prpič 2011-04-12 08:45:31 EDT 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
While not mandated by any specification, Linux systems rely on NMIs (Non-maskable Interrupts) being blocked by an IF-enabling (Interrupt Flag) STI instruction (an x86 instruction that enables interrupts; Set Interrupts); this is also the common behavior of all known hardware. Prior to this update, kernel panic could occur on guests using NMIs extensively (for example, a Linux system with the nmi_watchdog kernel parameter enabled). With this update, an NMI is disallowed when interrupts are blocked by an STI. This is done by checking for the condition and requesting an interrupt window exit if it occurs. As a result, kernel panic no longer occurs.
Note You need to log in before you can comment on or make changes to this bug.
First Last Prev Next    This bug is not in your last search results.