On Mon, Aug 29, 2011 at 05:27:11PM -0600, Eric B Munson wrote: > Currently, when qemu stops a guest kernel that guest will issue a soft lockup > message when it resumes. This set provides the ability for qemu to comminucate > to the guest that it has been stopped. When the guest hits the watchdog on > resume it will check if it was suspended before issuing the warning. > > Eric B Munson (4): > Add flag to indicate that a vm was stopped by the host > Add functions to check if the host has stopped the vm > Add generic stubs for kvm stop check functions > Add check for suspended vm in softlockup detector > > arch/x86/include/asm/pvclock-abi.h | 1 + > arch/x86/include/asm/pvclock.h | 2 ++ > arch/x86/kernel/kvmclock.c | 14 ++++++++++++++ > include/asm-generic/pvclock.h | 14 ++++++++++++++ > kernel/watchdog.c | 12 ++++++++++++ > 5 files changed, 43 insertions(+), 0 deletions(-) > create mode 100644 include/asm-generic/pvclock.h > > -- > 1.7.4.1 How is the host supposed to set this flag? As mentioned previously, if you save save/restore the offset added to kvmclock on stop/cont (and the TSC MSR, forgot to mention that), no paravirt infrastructure is required. Which means the issue is also fixed for older guests. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
