Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6ba9b346e1e0eca65ec589d32de3a9fe32dc5de6
Commit: 6ba9b346e1e0eca65ec589d32de3a9fe32dc5de6
Parent: 2aa6eb313e57a8254b17e60b8bb5e0a2570d7776
Author: Ingo Molnar <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 19 18:11:56 2007 +0000
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Mon Feb 19 14:18:43 2007 -0800
[PATCH] NOHZ: Fix RCU handling
When a CPU is needed for RCU the tick has to continue even when it was
stopped before.
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
kernel/time/tick-sched.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 95e41f7..9234e44 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -191,19 +191,19 @@ void tick_nohz_stop_sched_tick(void)
next_jiffies = get_next_timer_interrupt(last_jiffies);
delta_jiffies = next_jiffies - last_jiffies;
+ if (rcu_needs_cpu(cpu))
+ delta_jiffies = 1;
/*
* Do not stop the tick, if we are only one off
* or if the cpu is required for rcu
*/
- if (!ts->tick_stopped && (delta_jiffies == 1 || rcu_needs_cpu(cpu)))
+ if (!ts->tick_stopped && delta_jiffies == 1)
goto out;
/* Schedule the tick, if we are at least one jiffie off */
if ((long)delta_jiffies >= 1) {
- if (rcu_needs_cpu(cpu))
- delta_jiffies = 1;
- else
+ if (delta_jiffies > 1)
cpu_set(cpu, nohz_cpu_mask);
/*
* nohz_stop_sched_tick can be called several times before
-
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