On 12/11/15 23:16, Kamal Mostafa wrote: > 3.19.8-ckt10 -stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > > commit 0b34a166f291d255755be46e43ed5497cdd194f2 upstream. > > Currently there is a number of issues preventing PVHVM Xen guests from > doing successful kexec/kdump: > > - Bound event channels. > - Registered vcpu_info. > - PIRQ/emuirq mappings. > - shared_info frame after XENMAPSPACE_shared_info operation. > - Active grant mappings. > > Basically, newly booted kernel stumbles upon already set up Xen > interfaces and there is no way to reestablish them. In Xen-4.7 a new > feature called 'soft reset' is coming. A guest performing kexec/kdump > operation is supposed to call SCHEDOP_shutdown hypercall with > SHUTDOWN_soft_reset reason before jumping to new kernel. Hypervisor > (with some help from toolstack) will do full domain cleanup (but > keeping its memory and vCPU contexts intact) returning the guest to > the state it had when it was first booted and thus allowing it to > start over. > > Doing SHUTDOWN_soft_reset on Xen hypervisors which don't support it is > probably OK as by default all unknown shutdown reasons cause domain > destroy with a message in toolstack log: 'Unknown shutdown reason code > 5. Destroying domain.' which gives a clue to what the problem is and > eliminates false expectations. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx> > Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx> > --- > arch/x86/xen/enlighten.c | 23 +++++++++++++++++++++++ > include/xen/interface/sched.h | 8 ++++++++ > 2 files changed, 31 insertions(+) > > diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c > index f94ad30..2339a33 100644 > --- a/arch/x86/xen/enlighten.c > +++ b/arch/x86/xen/enlighten.c > @@ -33,6 +33,10 @@ > #include <linux/memblock.h> > #include <linux/edd.h> > > +#ifdef CONFIG_KEXEC_CORE You need to change all uses of CONFIG_KEXEC_CORE to CONFIG_KEXEC. David -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html