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From: Dario Faggioli <dario.faggioli@citrix.com>
To: xen-devel@lists.xenproject.org
Cc: George Dunlap <george.dunlap@eu.citrix.com>
Subject: [PATCH 05/16] xen: sched: move pCPU initialization in an helper
Date: Fri, 18 Mar 2016 20:04:32 +0100	[thread overview]
Message-ID: <20160318190432.8117.78163.stgit@Solace.station> (raw)
In-Reply-To: <20160318185524.8117.74837.stgit@Solace.station>

That will turn out useful in following patches, where such
code will need to be called more than just once. Create an
helper now, and move the code there, to avoid mixing code
motion and functional changes later.

In Credit2, some style cleanup is also done.

No functional change intended.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
---
Cc: George Dunlap <george.dunlap@eu.citrix.com>
---
 xen/common/sched_credit.c  |   22 +++++++++++++---------
 xen/common/sched_credit2.c |   26 ++++++++++++++++----------
 2 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c
index d4a0f5e..4488d7c 100644
--- a/xen/common/sched_credit.c
+++ b/xen/common/sched_credit.c
@@ -542,16 +542,11 @@ csched_alloc_pdata(const struct scheduler *ops, int cpu)
 }
 
 static void
-csched_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
+init_pdata(struct csched_private *prv, struct csched_pcpu *spc, int cpu)
 {
-    struct csched_private *prv = CSCHED_PRIV(ops);
-    struct csched_pcpu * const spc = pdata;
-    unsigned long flags;
-
-    /* cpu data needs to be allocated, but STILL uninitialized */
-    ASSERT(spc && spc->runq.next == spc->runq.prev && spc->runq.next == NULL);
-
-    spin_lock_irqsave(&prv->lock, flags);
+    ASSERT(spin_is_locked(&prv->lock));
+    /* cpu data needs to be allocated, but STILL uninitialized. */
+    ASSERT(spc && spc->runq.next == NULL && spc->runq.prev == NULL);
 
     /* Initialize/update system-wide config */
     prv->credit += prv->credits_per_tslice;
@@ -575,7 +570,16 @@ csched_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
     /* Start off idling... */
     BUG_ON(!is_idle_vcpu(curr_on_cpu(cpu)));
     cpumask_set_cpu(cpu, prv->idlers);
+}
 
+static void
+csched_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
+{
+    unsigned long flags;
+    struct csched_private *prv = CSCHED_PRIV(ops);
+
+    spin_lock_irqsave(&prv->lock, flags);
+    init_pdata(prv, pdata, cpu);
     spin_unlock_irqrestore(&prv->lock, flags);
 }
 
diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c
index b1642a8..919ca13 100644
--- a/xen/common/sched_credit2.c
+++ b/xen/common/sched_credit2.c
@@ -1969,16 +1969,13 @@ static void deactivate_runqueue(struct csched2_private *prv, int rqi)
 }
 
 static void
-csched2_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
+init_pdata(struct csched2_private *prv, unsigned int cpu)
 {
     unsigned rqi;
-    unsigned long flags;
-    struct csched2_private *prv = CSCHED2_PRIV(ops);
     struct csched2_runqueue_data *rqd;
     spinlock_t *old_lock;
 
-    spin_lock_irqsave(&prv->lock, flags);
-
+    ASSERT(spin_is_locked(&prv->lock));
     ASSERT(!cpumask_test_cpu(cpu, &prv->initialized));
 
     /* Figure out which runqueue to put it in */
@@ -1998,7 +1995,7 @@ csched2_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
         BUG();
     }
 
-    rqd=prv->rqd + rqi;
+    rqd = prv->rqd + rqi;
 
     printk("Adding cpu %d to runqueue %d\n", cpu, rqi);
     if ( ! cpumask_test_cpu(rqi, &prv->active_queues) )
@@ -2008,13 +2005,13 @@ csched2_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
     }
     
     /* IRQs already disabled */
-    old_lock=pcpu_schedule_lock(cpu);
+    old_lock = pcpu_schedule_lock(cpu);
 
     /* Move spinlock to new runq lock.  */
     per_cpu(schedule_data, cpu).schedule_lock = &rqd->lock;
 
     /* Set the runqueue map */
-    prv->runq_map[cpu]=rqi;
+    prv->runq_map[cpu] = rqi;
     
     cpumask_set_cpu(cpu, &rqd->idle);
     cpumask_set_cpu(cpu, &rqd->active);
@@ -2024,12 +2021,21 @@ csched2_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
 
     cpumask_set_cpu(cpu, &prv->initialized);
 
-    spin_unlock_irqrestore(&prv->lock, flags);
-
     return;
 }
 
 static void
+csched2_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
+{
+    struct csched2_private *prv = CSCHED2_PRIV(ops);
+    unsigned long flags;
+
+    spin_lock_irqsave(&prv->lock, flags);
+    init_pdata(prv, cpu);
+    spin_unlock_irqrestore(&prv->lock, flags);
+}
+
+static void
 csched2_free_pdata(const struct scheduler *ops, void *pcpu, int cpu)
 {
     unsigned long flags;


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  parent reply	other threads:[~2016-03-18 19:04 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-18 19:03 [PATCH 00/16] Fixes and improvement (including hard affinity!) for Credit2 Dario Faggioli
2016-03-18 19:04 ` [PATCH 01/16] xen: sched: fix locking when allocating an RTDS pCPU Dario Faggioli
2016-03-19  2:22   ` Meng Xu
2016-03-23 15:37   ` George Dunlap
2016-03-18 19:04 ` [PATCH 02/16] xen: sched: add .init_pdata hook to the scheduler interface Dario Faggioli
2016-03-22  8:08   ` Juergen Gross
2016-03-23 17:32   ` George Dunlap
2016-03-18 19:04 ` [PATCH 03/16] xen: sched: make implementing .alloc_pdata optional Dario Faggioli
2016-03-19  2:23   ` Meng Xu
2016-03-21 14:22   ` Jan Beulich
2016-03-23 17:36     ` George Dunlap
2016-03-24  9:43       ` Jan Beulich
2016-03-24 13:14         ` Dario Faggioli
2016-03-21 14:48   ` Juergen Gross
2016-03-21 15:07     ` Jan Beulich
2016-04-01 17:01       ` Dario Faggioli
2016-04-04  4:21         ` Juergen Gross
2016-04-04  6:13         ` Jan Beulich
2016-04-05 16:01           ` Dario Faggioli
2016-03-23 17:38   ` George Dunlap
2016-03-18 19:04 ` [PATCH 04/16] xen: sched: implement .init_pdata in all schedulers Dario Faggioli
2016-03-19  2:24   ` Meng Xu
2016-03-22  8:03   ` Juergen Gross
2016-03-23 17:46     ` George Dunlap
2016-03-18 19:04 ` Dario Faggioli [this message]
2016-03-23 17:51   ` [PATCH 05/16] xen: sched: move pCPU initialization in an helper George Dunlap
2016-03-23 18:09     ` George Dunlap
2016-03-24 13:21     ` Dario Faggioli
2016-03-18 19:04 ` [PATCH 06/16] xen: sched: prepare a .switch_sched hook for Credit1 Dario Faggioli
2016-03-18 19:04 ` [PATCH 07/16] xen: sched: prepare a .switch_sched hook for Credit2 Dario Faggioli
2016-03-18 19:04 ` [PATCH 08/16] " Dario Faggioli
2016-03-19  2:24   ` Meng Xu
2016-03-21 14:25   ` Jan Beulich
2016-03-18 19:05 ` [PATCH 09/16] xen: sched: close potential races when switching scheduler to CPUs Dario Faggioli
2016-03-19  2:25   ` Meng Xu
2016-03-23 19:05   ` George Dunlap
2016-04-05 16:26     ` Dario Faggioli
2016-04-06 15:51       ` Dario Faggioli
2016-03-24 12:14   ` George Dunlap
2016-04-05 17:37     ` Dario Faggioli
2016-04-06 16:21       ` Dario Faggioli
2016-03-18 19:05 ` [PATCH 10/16] xen: sched: improve credit2 bootparams' scope, placement and signedness Dario Faggioli
2016-03-21 14:51   ` Juergen Gross
2016-03-24 12:20   ` George Dunlap
2016-03-18 19:05 ` [PATCH 11/16] xen: sched: on Credit2, don't reprogram the timer if idle Dario Faggioli
2016-03-24 15:03   ` George Dunlap
2016-03-18 19:05 ` [PATCH 12/16] xen: sched: fix per-socket runqueue creation in credit2 Dario Faggioli
2016-03-24 12:24   ` George Dunlap
2016-03-18 19:05 ` [PATCH 13/16] xen: sched: allow for choosing credit2 runqueues configuration at boot Dario Faggioli
2016-03-22  7:46   ` Juergen Gross
2016-03-24 12:36   ` George Dunlap
2016-03-18 19:05 ` [PATCH 14/16] xen: sched: per-core runqueues as default in credit2 Dario Faggioli
2016-03-24 12:37   ` George Dunlap
2016-03-18 19:06 ` [PATCH 15/16] xen: sched: scratch space for cpumasks on Credit2 Dario Faggioli
2016-03-18 19:27   ` Andrew Cooper
2016-03-24 12:44     ` George Dunlap
2016-03-24 12:56       ` Andrew Cooper
2016-03-24 13:10       ` Dario Faggioli
2016-03-18 19:06 ` [PATCH 16/16] xen: sched: implement vcpu hard affinity in Credit2 Dario Faggioli
2016-03-24 15:42   ` George Dunlap
2016-04-05 16:50     ` Dario Faggioli

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