From: Venkatesh Pallipadi <venki@google.com>
To: Suresh Siddha <suresh.b.siddha@intel.com>, Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Aaron Durbin <adurbin@google.com>, Paul Turner <pjt@google.com>,
Yong Zhang <yong.zhang0@gmail.com>,
linux-kernel@vger.kernel.org, Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Ralf Baechle <ralf@linux-mips.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Venkatesh Pallipadi <venki@google.com>
Subject: [PATCH 3/5] mips: Use common fork_idle_from_wq in smpboot
Date: Tue, 6 Mar 2012 13:41:12 -0800 [thread overview]
Message-ID: <1331070074-31717-4-git-send-email-venki@google.com> (raw)
In-Reply-To: <1331070074-31717-1-git-send-email-venki@google.com>
Cleanup. Instead of reimplementing fork_idle on wq and idle task caching,
use fork_idle_from_wq().
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
---
arch/mips/kernel/smp.c | 47 +++--------------------------------------------
1 files changed, 3 insertions(+), 44 deletions(-)
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 32c1e95..37a4133 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -191,54 +191,13 @@ void __devinit smp_prepare_boot_cpu(void)
* and keep control until "cpu_online(cpu)" is set. Note: cpu is
* physical, not logical.
*/
-static struct task_struct *cpu_idle_thread[NR_CPUS];
-
-struct create_idle {
- struct work_struct work;
- struct task_struct *idle;
- struct completion done;
- int cpu;
-};
-
-static void __cpuinit do_fork_idle(struct work_struct *work)
-{
- struct create_idle *c_idle =
- container_of(work, struct create_idle, work);
-
- c_idle->idle = fork_idle(c_idle->cpu);
- complete(&c_idle->done);
-}
-
int __cpuinit __cpu_up(unsigned int cpu)
{
struct task_struct *idle;
- /*
- * Processor goes to start_secondary(), sets online flag
- * The following code is purely to make sure
- * Linux can schedule processes on this slave.
- */
- if (!cpu_idle_thread[cpu]) {
- /*
- * Schedule work item to avoid forking user task
- * Ported from arch/x86/kernel/smpboot.c
- */
- struct create_idle c_idle = {
- .cpu = cpu,
- .done = COMPLETION_INITIALIZER_ONSTACK(c_idle.done),
- };
-
- INIT_WORK_ONSTACK(&c_idle.work, do_fork_idle);
- schedule_work(&c_idle.work);
- wait_for_completion(&c_idle.done);
- idle = cpu_idle_thread[cpu] = c_idle.idle;
-
- if (IS_ERR(idle))
- panic(KERN_ERR "Fork failed for CPU %d", cpu);
- } else {
- idle = cpu_idle_thread[cpu];
- init_idle(idle, cpu);
- }
+ idle = fork_idle_from_wq(cpu);
+ if (IS_ERR(idle))
+ panic(KERN_ERR "Fork failed for CPU %d", cpu);
mp_ops->boot_secondary(cpu, idle);
--
1.7.7.3
next prev parent reply other threads:[~2012-03-06 21:42 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-23 0:36 [PATCH] Extend mwait idle to optimize away CAL and RES interrupts to an idle CPU -v1 Venkatesh Pallipadi
2012-02-23 7:50 ` Ingo Molnar
2012-02-23 9:08 ` Peter Zijlstra
2012-02-23 20:04 ` Venki Pallipadi
2012-02-23 20:03 ` Venki Pallipadi
2012-03-02 0:33 ` Venki Pallipadi
2012-03-02 1:28 ` Suresh Siddha
2012-03-02 1:35 ` Venki Pallipadi
2012-03-02 1:37 ` Suresh Siddha
2012-03-02 2:00 ` Venki Pallipadi
2012-03-02 7:21 ` Ingo Molnar
2012-03-02 17:41 ` Suresh Siddha
2012-03-06 21:41 ` fork_idle from wq cleanup Venkatesh Pallipadi
2012-03-06 21:41 ` [PATCH 1/5] x86: Move fork_idle from wq and idle caching to common code Venkatesh Pallipadi
2012-03-06 21:41 ` [PATCH 2/5] ia64: Use common fork_idle_from_wq in smpboot Venkatesh Pallipadi
2012-03-06 21:41 ` Venkatesh Pallipadi [this message]
2012-03-06 22:51 ` [PATCH 3/5] mips: " Ralf Baechle
2012-03-06 21:41 ` [PATCH 4/5] powerpc: " Venkatesh Pallipadi
2012-03-06 21:41 ` [PATCH 5/5] s390: " Venkatesh Pallipadi
2012-03-07 7:00 ` Heiko Carstens
2012-03-07 6:06 ` fork_idle from wq cleanup Suresh Siddha
2012-02-23 9:30 ` [PATCH] Extend mwait idle to optimize away CAL and RES interrupts to an idle CPU -v1 Peter Zijlstra
2012-02-23 19:34 ` Venki Pallipadi
2012-02-24 5:41 ` Yong Zhang
2012-02-24 6:13 ` Yong Zhang
2012-02-27 8:38 ` Peter Zijlstra
2012-02-27 9:08 ` Yong Zhang
2012-02-27 9:30 ` Peter Zijlstra
2012-02-27 9:51 ` Yong Zhang
2012-02-26 1:32 ` Paul E. McKenney
2012-02-27 9:06 ` Yong Zhang
2012-02-27 17:05 ` Paul E. McKenney
2012-02-28 7:12 ` Yong Zhang
2012-02-28 13:05 ` Paul E. McKenney
2012-02-29 6:36 ` Yong Zhang
2012-02-27 8:45 ` Peter Zijlstra
2012-02-27 18:17 ` Venki Pallipadi
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