Shift initialization of semaphores taken on exit() path
to earlier in the bootup sequence. Without this fix,
booting on large cpu machines hangs at down_read() called
on one of the per-cpu semaphores declared in taskstats.
Signed-Off-By: Shailabh Nagar <[email protected]>
kernel/taskstats.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
Index: linux-2.6.18-rc1/kernel/taskstats.c
===================================================================
--- linux-2.6.18-rc1.orig/kernel/taskstats.c 2006-07-10 23:44:16.000000000 -0400
+++ linux-2.6.18-rc1/kernel/taskstats.c 2006-07-10 23:44:20.000000000 -0400
@@ -501,15 +501,20 @@ static struct genl_ops taskstats_ops = {
/* Needed early in initialization */
void __init taskstats_init_early(void)
{
+ unsigned int i;
+
taskstats_cache = kmem_cache_create("taskstats_cache",
sizeof(struct taskstats),
0, SLAB_PANIC, NULL, NULL);
+ for_each_possible_cpu(i) {
+ INIT_LIST_HEAD(&(per_cpu(listener_array, i).list));
+ init_rwsem(&(per_cpu(listener_array, i).sem));
+ }
}
static int __init taskstats_init(void)
{
int rc;
- unsigned int i;
rc = genl_register_family(&family);
if (rc)
@@ -519,11 +524,6 @@ static int __init taskstats_init(void)
if (rc < 0)
goto err;
- for_each_possible_cpu(i) {
- INIT_LIST_HEAD(&(per_cpu(listener_array, i).list));
- init_rwsem(&(per_cpu(listener_array, i).sem));
- }
-
family_registered = 1;
return 0;
err:
-
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