I noticed this recently:
pc:~ # cat /proc/interrupts
CPU0 CPU1
0: 39836 0 IO-APIC-edge timer
1: 574 0 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
8: 2 0 IO-APIC-edge rtc
9: 0 0 IO-APIC-edge acpi
12: 20362 0 IO-APIC-edge PS/2 Mouse
14: 7 0 IO-APIC-edge ide0
16: 8906 0 IO-APIC-level aic7xxx
18: 789 0 IO-APIC-level eth0
NMI: 0 0
LOC: 39741 39740
ERR: 0
MIS: 0
pc:~ # cat /proc/irq/0/smp_affinity
ffffffff
pc:~ # echo ffffffff > /proc/irq/0/smp_affinity
pc:~ # cat /proc/interrupts
CPU0 CPU1
0: 50921 947 IO-APIC-edge timer
1: 974 0 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
8: 2 0 IO-APIC-edge rtc
9: 0 0 IO-APIC-edge acpi
12: 25530 0 IO-APIC-edge PS/2 Mouse
14: 7 0 IO-APIC-edge ide0
16: 8935 0 IO-APIC-level aic7xxx
18: 801 0 IO-APIC-level eth0
NMI: 0 0
LOC: 51773 51772
ERR: 0
MIS: 0
Did the APIC or mpparse changes cause this?
Please cc me, I'm not on the list.
> Did the APIC or mpparse changes cause this?
+#ifdef CONFIG_X86_CLUSTERED_APIC
+static inline int target_cpus(void)
+{
+ static int cpu;
+ switch(clustered_apic_mode){
+ case CLUSTERED_APIC_NUMAQ:
+ /* Broadcast intrs to local quad only. */
+ return APIC_BROADCAST_ID_APIC;
+ case CLUSTERED_APIC_XAPIC:
+ /*round robin the interrupts*/
+ cpu = (cpu+1)%smp_num_cpus;
+ return cpu_to_physical_apicid(cpu);
+ default:
+ }
+ return cpu_online_map;
+}
+#else
+#define target_cpus() (0x01)
+#endif
(2.4.21-pre3)
that's wrong..... 0x01 -> 0xFF and it should be fixed
Thanks Manfred and Arjan for responding, and for the solution :-)
My box works now as before.
pc:~ # cat /proc/interrupts
CPU0 CPU1
0: 5894 5418 IO-APIC-edge timer
1: 57 40 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
8: 0 2 IO-APIC-edge rtc
9: 0 0 IO-APIC-edge acpi
12: 283 223 IO-APIC-edge PS/2 Mouse
14: 4 3 IO-APIC-edge ide0
16: 4044 3976 IO-APIC-level aic7xxx
18: 50 42 IO-APIC-level eth0
NMI: 11227 11227
LOC: 11204 11203
ERR: 0
MIS: 0
Patch attached at the bottom of the page. If any comments, please cc me.
On Sunday 19 January 2003 19:54, you wrote:
> > Did the APIC or mpparse changes cause this?
>
> +#ifdef CONFIG_X86_CLUSTERED_APIC
> +static inline int target_cpus(void)
> +{
> + static int cpu;
> + switch(clustered_apic_mode){
> + case CLUSTERED_APIC_NUMAQ:
> + /* Broadcast intrs to local quad only. */
> + return APIC_BROADCAST_ID_APIC;
> + case CLUSTERED_APIC_XAPIC:
> + /*round robin the interrupts*/
> + cpu = (cpu+1)%smp_num_cpus;
> + return cpu_to_physical_apicid(cpu);
> + default:
> + }
> + return cpu_online_map;
> +}
> +#else
> +#define target_cpus() (0x01)
> +#endif
> (2.4.21-pre3)
> that's wrong..... 0x01 -> 0xFF and it should be fixed
--- linux/include/asm-i386/smpboot.h 2003-01-20 16:45:13.000000000 +0100
+++ linux/include/asm-i386/smpboot.h.orig 2003-01-20 16:44:05.000000000 +0100
@@ -116,6 +116,6 @@
return cpu_online_map;
}
#else
-#define target_cpus() (0xFFFFFFFF)
+#define target_cpus() (0x01)
#endif
#endif