Messages in this thread | | | Date | Thu, 04 Aug 2011 11:37:12 +0300 | From | Dor Laor <> | Subject | Re: [RFC PATCH 0/3] Avoid soft lockup message when KVM is stopped by host |
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On 08/03/2011 05:24 PM, Eric B Munson wrote: > This set is just a rough first pass at avoiding soft lockup warnings when a host > pauses the execution of a guest. A flag is set by the host in the shared page > used for the pvclock when the host goes to stop the guest. When the guest > resumes and detects a soft lockup, this flag is checked and cleared and the soft > lockup message is skipped.
While this will cover the case were the host stops a guest, there will be other plain cases where the host is just over committed and will cause a softlockup false positive on the guest.
Softlockup should use stolen time that makes use of the guest running info would cover both cases
> > This currently breaks the build for non-x86 architectures but part of what I am > looking for here is how to go about adding the function stubs for everything > else. > > Eric B Munson (3): > Add flag to indicate that a vm was stopped by the host > Add functions to check if the host has stopped the vm > Add check for suspended vm in softlockup detector > > arch/x86/include/asm/pvclock-abi.h | 1 + > arch/x86/include/asm/pvclock.h | 3 +++ > arch/x86/kernel/kvmclock.c | 12 ++++++++++++ > kernel/watchdog.c | 11 +++++++++++ > 4 files changed, 27 insertions(+), 0 deletions(-) >
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