On Thu, May 15, 2003 at 09:57:42AM +0100, David Howells wrote:
> I've got a computer here with a pair of Pentium Pro CPUs in it. 2.4 kernels
> have no problem starting both CPUs, only later 2.5 kernels (with or without
> noapic passed on the kernel cmdline).
> Can anyone suggest what might need to be done to fix the problem?
> The motherboard sports a fairly standard Intel chipset and there's a Matrox
> graphics card plugged in:
Sparse physical APIC ID's are not handled properly. This should correct
them.
-- wli
diff -prauN linux-2.5.69-1/arch/i386/kernel/smpboot.c dhowells-2.5.69-1/arch/i386/kernel/smpboot.c
--- linux-2.5.69-1/arch/i386/kernel/smpboot.c Mon May 12 11:09:21 2003
+++ dhowells-2.5.69-1/arch/i386/kernel/smpboot.c Thu May 15 02:46:59 2003
@@ -935,7 +935,7 @@
static void __init smp_boot_cpus(unsigned int max_cpus)
{
- int apicid, cpu, bit;
+ int apicid, cpu, bit, kicked;
/*
* Setup boot CPU information
@@ -1018,7 +1018,8 @@
*/
Dprintk("CPU present map: %lx\n", phys_cpu_present_map);
- for (bit = 0; bit < NR_CPUS; bit++) {
+ kicked = 0;
+ for (bit = 0; kicked < NR_CPUS && bit < BITS_PER_LONG; bit++) {
apicid = cpu_present_to_apicid(bit);
/*
* Don't even attempt to start the boot CPU!
@@ -1034,6 +1035,8 @@
if (do_boot_cpu(apicid))
printk("CPU #%d not responding - cannot use it.\n",
apicid);
+ else
+ ++kicked;
}
/*
-
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This archive was generated by hypermail 2b29 : Thu May 15 2003 - 22:00:56 EST