Messages in this thread Patch in this message | | | Date | Mon, 13 Feb 2006 19:19:19 -0500 | From | Hubertus Franke <> | Subject | SMP BUG |
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Folks the change introduced in 2.6.16-rc2 over 2.6.15 wrt to the SMP initialization are wrong. Please apply to unroll the change..
Here is the logic ... sched_init is called from start_kernel before the architecture specific function cpu_check_smp() is called which is done as part of rest_init().
On s390 this actually sets the cpu_possible_map, which is now used in sched_init through the for_each_cpu without properly being initialized. As a result bringing 2nd and subsequent cpu online breaks.
This should be a quick fix, until this chicken and egg problem is solved otherwise.
-- Hubertus
--- kernel/sched.c.orig 2006-02-13 19:08:28.000000000 -0500 +++ kernel/sched.c 2006-02-13 19:09:08.000000000 -0500 @@ -6111,7 +6111,7 @@ void __init sched_init(void) runqueue_t *rq; int i, j, k;
- for_each_cpu(i) { + for (i = 0; i < NR_CPUS; i++ ) { prio_array_t *array;
rq = cpu_rq(i); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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