3 architectures make the scheduler aware of secondary CPUs before they
can really execute anything. This is bad because during the boot
process threads will be put on their run queues. That means that on
such architecture we are only able to boot because the first CPU can
steal threads from the not-yet-running CPUs.
So let's be coherent and remove the requirement of being able to
steal threads to boot. ok?
Index: amd64/amd64/cpu.c
===================================================================
RCS file: /cvs/src/sys/arch/amd64/amd64/cpu.c,v
retrieving revision 1.96
diff -u -p -r1.96 cpu.c
--- amd64/amd64/cpu.c 17 Mar 2016 13:18:47 -0000 1.96
+++ amd64/amd64/cpu.c 29 Apr 2016 11:43:05 -0000
@@ -443,7 +443,6 @@ cpu_attach(struct device *parent, struct
#if defined(MULTIPROCESSOR)
cpu_intr_init(ci);
gdt_alloc_cpu(ci);
- sched_init_cpu(ci);
cpu_start_secondary(ci);
ncpus++;
if (ci->ci_flags & CPUF_PRESENT) {
@@ -571,6 +570,7 @@ cpu_boot_secondary_processors(void)
continue;
if (ci->ci_flags & (CPUF_BSP | CPUF_SP | CPUF_PRIMARY))
continue;
+ sched_init_cpu(ci);
ci->ci_randseed = (arc4random() & 0x7fffffff) + 1;
cpu_boot_secondary(ci);
}
Index: i386/i386/cpu.c
===================================================================
RCS file: /cvs/src/sys/arch/i386/i386/cpu.c,v
retrieving revision 1.74
diff -u -p -r1.74 cpu.c
--- i386/i386/cpu.c 17 Mar 2016 13:18:47 -0000 1.74
+++ i386/i386/cpu.c 29 Apr 2016 11:43:56 -0000
@@ -323,7 +323,6 @@ cpu_attach(struct device *parent, struct
gdt_alloc_cpu(ci);
ci->ci_flags |= CPUF_PRESENT | CPUF_AP;
identifycpu(ci);
- sched_init_cpu(ci);
ci->ci_next = cpu_info_list->ci_next;
cpu_info_list->ci_next = ci;
ncpus++;
@@ -500,6 +499,7 @@ cpu_boot_secondary_processors(void)
continue;
if (ci->ci_flags & (CPUF_BSP|CPUF_SP|CPUF_PRIMARY))
continue;
+ sched_init_cpu(ci);
ci->ci_randseed = (arc4random() & 0x7fffffff) + 1;
cpu_boot_secondary(ci);
}
Index: sparc64/sparc64/cpu.c
===================================================================
RCS file: /cvs/src/sys/arch/sparc64/sparc64/cpu.c,v
retrieving revision 1.63
diff -u -p -r1.63 cpu.c
--- sparc64/sparc64/cpu.c 16 Nov 2014 12:30:59 -0000 1.63
+++ sparc64/sparc64/cpu.c 29 Apr 2016 11:44:29 -0000
@@ -180,8 +180,6 @@ alloc_cpuinfo(struct mainbus_attach_args
cpi->ci_self = cpi;
cpi->ci_node = ma->ma_node;
- sched_init_cpu(cpi);
-
/*
* Finally, add itself to the list of active cpus.
*/
@@ -701,6 +699,8 @@ cpu_boot_secondary_processors(void)
for (ci = cpus; ci != NULL; ci = ci->ci_next) {
if (ci->ci_upaid == cpu_myid())
continue;
+
+ sched_init_cpu(cpi);
ci->ci_randseed = (arc4random() & 0x7fffffff) + 1;
if (CPU_ISSUN4V)
