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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