[PATCH] sched: update comment for move_task_off_dead_cpu
From: Vegard Nossum
Date: Thu Nov 20 2008 - 19:23:20 EST
This commit:
commit f7b4cddcc5aca03e80e357360c9424dfba5056c2
Author: Oleg Nesterov <oleg@xxxxxxxxxx>
Date: Tue Oct 16 23:30:56 2007 -0700
do CPU_DEAD migrating under read_lock(tasklist) instead of write_lock_irq(ta
Currently move_task_off_dead_cpu() is called under
write_lock_irq(tasklist). This means it can't use task_lock() which is
needed to improve migrating to take task's ->cpuset into account.
Change the code to call move_task_off_dead_cpu() with irqs enabled, and
change migrate_live_tasks() to use read_lock(tasklist).
...forgot to update the comment in front of move_task_off_dead_cpu.
Reference: http://lkml.org/lkml/2008/6/23/135
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Vegard Nossum <vegard.nossum@xxxxxxxxx>
---
kernel/sched.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 9b1e793..7ff3e94 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6125,7 +6125,6 @@ static int __migrate_task_irq(struct task_struct *p, int src_cpu, int dest_cpu)
/*
* Figure out where task on dead CPU should go, use force if necessary.
- * NOTE: interrupts should be disabled by the caller
*/
static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
{
--
1.5.6.5
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