The patch titled
sched: tasks cannot run on cpus onlined after boot
has been removed from the -mm tree. Its filename was
sched-tasks-cannot-run-on-cpus-onlined-after-boot.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: sched: tasks cannot run on cpus onlined after boot
From: Nathan Lynch <ntl@xxxxxxxxx>
Commit 5c1e176781f43bc902a51e5832f789756bff911b ("sched: force /sbin/init
off isolated cpus") sets init's cpus_allowed to a subset of cpu_online_map
at boot time, which means that tasks won't be scheduled on cpus that are
added to the system later.
Make init's cpus_allowed a subset of cpu_possible_map instead. This should
still preserve the behavior that Nick's change intended.
Thanks to Giuliano Pochini for reporting this and testing the fix:
http://ozlabs.org/pipermail/linuxppc-dev/2006-December/029397.html
Signed-off-by: Nathan Lynch <ntl@xxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/sched.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/sched.c~sched-tasks-cannot-run-on-cpus-onlined-after-boot kernel/sched.c
--- a/kernel/sched.c~sched-tasks-cannot-run-on-cpus-onlined-after-boot
+++ a/kernel/sched.c
@@ -6865,7 +6865,7 @@ void __init sched_init_smp(void)
lock_cpu_hotplug();
arch_init_sched_domains(&cpu_online_map);
- cpus_andnot(non_isolated_cpus, cpu_online_map, cpu_isolated_map);
+ cpus_andnot(non_isolated_cpus, cpu_possible_map, cpu_isolated_map);
if (cpus_empty(non_isolated_cpus))
cpu_set(smp_processor_id(), non_isolated_cpus);
unlock_cpu_hotplug();
_
Patches currently in -mm which might be from ntl@xxxxxxxxx are
-
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