On 10/09/2013 02:33 PM, Raghavendra K T wrote:
We use jump label to enable pv-spinlock. With the changes in (442e0973e927 Merge branch 'x86/jumplabel'), the jump label behaviour has changed that would result in evntual hang of the VM since we would end up in a situation where slowpath locks would halt the vcpus but we will not be able to wakeup the vcpu by lock releaser using unlock kick. Similar problem in Xen and more detailed description is available in a945928ea270 (xen: Do not enable spinlocks before jump_label_init() has executed) This patch splits kvm_spinlock_init to separate jump label changes with pvops patching and also make jump label enabling after jump_label_init(). Signed-off-by: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
Ingo, Could you please take this fix? This is reviewed by Paolo and Steven. -- 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
