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, _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
