On Wed, 20 Dec 2017, Alexandru Chirvasitu wrote:
> On Wed, Dec 20, 2017 at 11:58:57AM +0800, Dou Liyang wrote:
> > At 12/20/2017 08:31 AM, Thomas Gleixner wrote:
> > > > I had never heard of 'bisect' before this casual mention (you might tell
> > > > I am a bit out of my depth). I've since applied it to Linus' tree
> > > > between
> > >
> > > > bebc608 Linux 4.14 (good)
> > > >
> > > > and
> > > >
> > > > 4fbd8d1 Linux 4.15-rc1 (bad)
> > >
> > > Is Linus current head 4.15-rc4 bad as well?
> > >
> > [...]
>
> Yes. Exactly the same symptoms on
>
> 1291a0d5 Linux 4.15-rc4
>
> compiled just now from Linus' tree.
Ok, lets take a step back. The bisect/kexec attempts led us away from the
initial problem which is the machine locking up after login, right?
Could you try the patch below on top of Linus tree (rc5+)?
Thanks,
tglx
8<---------------
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -151,7 +151,7 @@ static struct apic apic_flat __ro_after_
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = flat_apic_id_registered,
- .irq_delivery_mode = dest_LowestPrio,
+ .irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 1, /* logical */
.disable_esr = 0,
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -105,7 +105,7 @@ static struct apic apic_default __ro_aft
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = default_apic_id_registered,
- .irq_delivery_mode = dest_LowestPrio,
+ .irq_delivery_mode = dest_Fixed,
/* logical delivery broadcast to all CPUs: */
.irq_dest_mode = 1,
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -184,7 +184,7 @@ static struct apic apic_x2apic_cluster _
.apic_id_valid = x2apic_apic_id_valid,
.apic_id_registered = x2apic_apic_id_registered,
- .irq_delivery_mode = dest_LowestPrio,
+ .irq_delivery_mode = dest_Fixed,
.irq_dest_mode = 1, /* logical */
.disable_esr = 0,
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