Bug 712076 - Need to disable timer watchdogs in guests
Summary: Need to disable timer watchdogs in guests
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.1
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Gleb Natapov
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-06-09 12:51 UTC by Ronen Hod
Modified: 2013-12-09 00:55 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-06-27 13:22:36 UTC
Target Upstream Version:

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Description Ronen Hod 2011-06-09 12:51:52 UTC 
This is the leftover from BZ#691717 that changed its nature over time.
  
Looks like nmi watchdog activates at random times. We should work on disabling all timer base watchdogs in all relevant guests, not waste our time debugging something that can't work. I am more concerned with KVM internal error that qemu produces.
Comment 1 Gleb Natapov 2011-06-09 12:55:13 UTC 
In 6.1 softlockup and nmi watchdog was reworked by commit f5251db21f151cccb8bc5aeb11e9e21dcbd13fc2. So before we proceed in this direction we need to make sure we can reproduce problems we saw in 6.0.
Comment 2 Gleb Natapov 2011-06-27 12:26:19 UTC 
Old nmi watchdog is affectively disabled on x86_64 by commit 2d09fe61. New one, that uses perf events, is disabled in a guest since KVM does not have perf counters.
Comment 3 Gleb Natapov 2011-06-27 12:37:51 UTC 
47f668319dc26a8e5f845bcb61d30b2b2e3d8893 did the same for i686. It looks like there is nothing to do for that BZ.
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