On Wed, 26 Mar 2003 14:00:10 +0800,
"Dong, Edie" <[EMAIL PROTECTED]> wrote:
>VGhhdCBpcyBzdHJhbmdlciwgSSBnb3QgdGhlIHByb2dyYW0gdG8gIlN0YWNrIGlzIG5vdCBpbiB0
Ugh, please use plain text.
>That is stranger, I got the program to "Stack is not in task_struct, backtrace not
>available",
>(in kdba_bt_stack), I checked the macro task_has_cpu(p) is false beacuse the initial
>task is
>not switched yet, and the memory in &p->thread are all 0. (md &p->thread).
>Any hints?
You should have included that information in your original mail,
instead of making us guess what error you were getting. This is a
kernel bug where it incorrectly sets scheduling fields on the idle
tasks.
diff -ur 2.4.20-pristine/arch/i386/kernel/smpboot.c
2.4.20-sched/arch/i386/kernel/smpboot.c
--- 2.4.20-pristine/arch/i386/kernel/smpboot.c Fri Nov 29 11:38:59 2002
+++ 2.4.20-sched/arch/i386/kernel/smpboot.c Wed Mar 26 16:22:49 2003
@@ -803,8 +803,7 @@
if (!idle)
panic("No idle process for CPU %d", cpu);
- idle->processor = cpu;
- idle->cpus_runnable = 1 << cpu; /* we schedule the first task manually */
+ task_set_cpu_only(idle, cpu); /* we schedule the first task manually */
map_cpu_to_boot_apicid(cpu, apicid);
diff -ur 2.4.20-pristine/include/linux/sched.h 2.4.20-sched/include/linux/sched.h
--- 2.4.20-pristine/include/linux/sched.h Mon Mar 17 15:35:32 2003
+++ 2.4.20-sched/include/linux/sched.h Wed Mar 26 16:14:40 2003
@@ -568,6 +568,12 @@
tsk->cpus_runnable = 1UL << cpu;
}
+static inline void task_set_cpu_only(struct task_struct *tsk, unsigned int cpu)
+{
+ task_set_cpu(tsk, cpu);
+ tsk->cpus_allowed = 1UL << cpu;
+}
+
static inline void task_release_cpu(struct task_struct *tsk)
{
tsk->cpus_runnable = ~0UL;
diff -ur 2.4.20-pristine/init/main.c 2.4.20-sched/init/main.c
--- 2.4.20-pristine/init/main.c Wed May 29 14:00:22 2002
+++ 2.4.20-sched/init/main.c Wed Mar 26 16:30:23 2003
@@ -354,6 +354,7 @@
* enable them
*/
lock_kernel();
+ task_set_cpu_only(current, 0);
printk(linux_banner);
setup_arch(&command_line);
printk("Kernel command line: %s\n", saved_command_line);
diff -ur 2.4.20-pristine/kernel/sched.c 2.4.20-sched/kernel/sched.c
--- 2.4.20-pristine/kernel/sched.c Fri Aug 30 13:51:40 2002
+++ 2.4.20-sched/kernel/sched.c Wed Mar 26 16:27:35 2003
@@ -525,6 +525,7 @@
goto out_unlock;
}
#else
+ task_release_cpu(prev);
prev->policy &= ~SCHED_YIELD;
#endif /* CONFIG_SMP */
}
