search for: smp_suspend

...domU receives suspend request, it should invoke driver suspend method of owned physical devices. Before that, one other necessary step is to freeze all processes since some may still hold critical resource. In this case, we need borrow some Linux PM stuff into xen suspend path, something like: Smp_suspend(); freeze_processes(); device_suspend(); device_power_down(); xenbus_suspend(); ... HYPERVISOR_suspend(virt_to_mfn(xen_start_info)); ... xenbus_resume(); device_power_up(); device_resume(); thaw_processes(); smp_resume(); It may be more difficult if we want to support wake-on-LAN when...

...0  [<c01156f6>] do_page_fault+0x3c6/0x8b1  [<c0105067>] error_code+0x2b/0x30  [<c010e3ba>] cache_remove_dev+0x2a/0x60  [<c010e425>] cacheinfo_cpu_callback+0x35/0x40  [<c012fae8>] notifier_call_chain+0x18/0x40  [<c013b889>] cpu_down+0x139/0x260  [<c028bc9f>] smp_suspend+0x7f/0x100  [<c028ca80>] __do_suspend+0x40/0x180  [<c0136a06>] kthread+0x96/0xe0  [<c0102e95>] kernel_thread_helper+0x5/0x10 Code: 0c 5b 5e 5f 5d c3 8d 74 26 00 8d bc 27 00 00 00 00 55 89 e5 57 56 89 d6 53 89 c3 8d 04 92 8b 14 9d 20 4d 46 c0 8d 04 82 8d 78 10 <8b> 40 10 ba 2...

Stamp softlockup thread earlier before do_timer, because the latter is the one to actually trigger lock warning for long-time offline. Or else, I obserevd softlockup warning easily at manual vcpu hot-remove/plug, or when suspend cancel into old context. One point here is to cover both stolen and blocked time to compare with offline threshold. vcpu hotplug falls into ''stolen''