lkml.org 
[lkml]   [2006]   [Feb]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectSMP BUG
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/

\
 
 \ /
  Last update: 2006-02-14 01:21    [from the cache]
©2003-2011 Jasper Spaans