|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen master] sched: remove sched_init_pdata()
commit a3134a2eb099f01d2247c7f547a448467bc24149
Author: Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Tue Feb 18 16:25:02 2020 +0100
Commit: Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Feb 18 16:25:02 2020 +0100
sched: remove sched_init_pdata()
sched_init_pdata() is used nowhere, it can be removed. Same applies to
the .init_pdata hook of the per-scheduler interface. The last caller
has been removed with commit f855dd962523b6cb47a92037bdd28b1485141abe
("sched: add minimalistic idle scheduler for free cpus").
With the idle scheduler introduction the switch_sched hook became the
only place where new cpus get added to a normal scheduler, so the
init_pdata functionality is performed inside that hook.
Adjust some comments as well to reflect reality. While at it correct a
typo in a comment next to a modified comment.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Dario Faggioli <dfaggioli@xxxxxxxx>
---
xen/common/sched/core.c | 9 ++++-----
xen/common/sched/credit.c | 12 ------------
xen/common/sched/credit2.c | 21 ---------------------
xen/common/sched/null.c | 10 ----------
xen/common/sched/private.h | 8 --------
xen/common/sched/rt.c | 31 -------------------------------
6 files changed, 4 insertions(+), 87 deletions(-)
diff --git a/xen/common/sched/core.c b/xen/common/sched/core.c
index d4e8944e0e..2e43f8029f 100644
--- a/xen/common/sched/core.c
+++ b/xen/common/sched/core.c
@@ -2775,10 +2775,10 @@ static int cpu_schedule_callback(
* order. If no per-pCPU memory was allocated, there is no need to
* provide an implementation of free_pdata. deinit_pdata may, however,
* be necessary/useful in this case too (e.g., it can undo something done
- * on scheduler wide data structure during init_pdata). Both deinit_pdata
+ * on scheduler wide data structure during switch_sched). Both deinit_pdata
* and free_pdata are called during CPU_DEAD.
*
- * If someting goes wrong during bringup, we go to CPU_UP_CANCELLED.
+ * If something goes wrong during bringup, we go to CPU_UP_CANCELLED.
*/
switch ( action )
{
@@ -2968,9 +2968,8 @@ int schedule_cpu_add(unsigned int cpu, struct cpupool *c)
* To setup the cpu for the new scheduler we need:
* - a valid instance of per-CPU scheduler specific data, as it is
* allocated by sched_alloc_pdata(). Note that we do not want to
- * initialize it yet (i.e., we are not calling sched_init_pdata()).
- * That will be done by the target scheduler, in sched_switch_sched(),
- * in proper ordering and with locking.
+ * initialize it yet, as that will be done by the target scheduler,
+ * in sched_switch_sched(), in proper ordering and with locking.
* - a valid instance of per-vCPU scheduler specific data, for the idle
* vCPU of cpu. That is what the target scheduler will use for the
* sched_priv field of the per-vCPU info of the idle domain.
diff --git a/xen/common/sched/credit.c b/xen/common/sched/credit.c
index 05946eea6e..93d89da278 100644
--- a/xen/common/sched/credit.c
+++ b/xen/common/sched/credit.c
@@ -614,17 +614,6 @@ init_pdata(struct csched_private *prv, struct csched_pcpu
*spc, int cpu)
spc->nr_runnable = 0;
}
-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);
-}
-
/* Change the scheduler of cpu to us (Credit). */
static spinlock_t *
csched_switch_sched(struct scheduler *new_ops, unsigned int cpu,
@@ -2273,7 +2262,6 @@ static const struct scheduler sched_credit_def = {
.alloc_udata = csched_alloc_udata,
.free_udata = csched_free_udata,
.alloc_pdata = csched_alloc_pdata,
- .init_pdata = csched_init_pdata,
.deinit_pdata = csched_deinit_pdata,
.free_pdata = csched_free_pdata,
.switch_sched = csched_switch_sched,
diff --git a/xen/common/sched/credit2.c b/xen/common/sched/credit2.c
index f2752f27e2..7d104f15d0 100644
--- a/xen/common/sched/credit2.c
+++ b/xen/common/sched/credit2.c
@@ -3816,26 +3816,6 @@ init_pdata(struct csched2_private *prv, struct
csched2_pcpu *spc,
return spc->runq_id;
}
-static void
-csched2_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
-{
- struct csched2_private *prv = csched2_priv(ops);
- spinlock_t *old_lock;
- unsigned long flags;
- unsigned rqi;
-
- write_lock_irqsave(&prv->lock, flags);
- old_lock = pcpu_schedule_lock(cpu);
-
- rqi = init_pdata(prv, pdata, cpu);
- /* Move the scheduler lock to the new runq lock. */
- get_sched_res(cpu)->schedule_lock = &prv->rqd[rqi].lock;
-
- /* _Not_ pcpu_schedule_unlock(): schedule_lock may have changed! */
- spin_unlock(old_lock);
- write_unlock_irqrestore(&prv->lock, flags);
-}
-
/* Change the scheduler of cpu to us (Credit2). */
static spinlock_t *
csched2_switch_sched(struct scheduler *new_ops, unsigned int cpu,
@@ -4083,7 +4063,6 @@ static const struct scheduler sched_credit2_def = {
.alloc_udata = csched2_alloc_udata,
.free_udata = csched2_free_udata,
.alloc_pdata = csched2_alloc_pdata,
- .init_pdata = csched2_init_pdata,
.deinit_pdata = csched2_deinit_pdata,
.free_pdata = csched2_free_pdata,
.switch_sched = csched2_switch_sched,
diff --git a/xen/common/sched/null.c b/xen/common/sched/null.c
index 8c3101649d..82d5d1baab 100644
--- a/xen/common/sched/null.c
+++ b/xen/common/sched/null.c
@@ -166,15 +166,6 @@ static void init_pdata(struct null_private *prv, struct
null_pcpu *npc,
npc->unit = NULL;
}
-static void null_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
-{
- struct null_private *prv = null_priv(ops);
-
- ASSERT(pdata);
-
- init_pdata(prv, pdata, cpu);
-}
-
static void null_deinit_pdata(const struct scheduler *ops, void *pcpu, int cpu)
{
struct null_private *prv = null_priv(ops);
@@ -1042,7 +1033,6 @@ static const struct scheduler sched_null_def = {
.deinit = null_deinit,
.alloc_pdata = null_alloc_pdata,
.free_pdata = null_free_pdata,
- .init_pdata = null_init_pdata,
.switch_sched = null_switch_sched,
.deinit_pdata = null_deinit_pdata,
diff --git a/xen/common/sched/private.h b/xen/common/sched/private.h
index 2a94179baa..367811a12f 100644
--- a/xen/common/sched/private.h
+++ b/xen/common/sched/private.h
@@ -306,7 +306,6 @@ struct scheduler {
struct sched_unit *, void *);
void (*free_pdata) (const struct scheduler *, void *, int);
void * (*alloc_pdata) (const struct scheduler *, int);
- void (*init_pdata) (const struct scheduler *, void *, int);
void (*deinit_pdata) (const struct scheduler *, void *, int);
/* Returns ERR_PTR(-err) for error, NULL for 'nothing needed'. */
@@ -408,13 +407,6 @@ static inline void sched_free_pdata(const struct scheduler
*s, void *data,
s->free_pdata(s, data, cpu);
}
-static inline void sched_init_pdata(const struct scheduler *s, void *data,
- int cpu)
-{
- if ( s->init_pdata )
- s->init_pdata(s, data, cpu);
-}
-
static inline void sched_deinit_pdata(const struct scheduler *s, void *data,
int cpu)
{
diff --git a/xen/common/sched/rt.c b/xen/common/sched/rt.c
index 66585ed50a..c24cd2ac32 100644
--- a/xen/common/sched/rt.c
+++ b/xen/common/sched/rt.c
@@ -713,36 +713,6 @@ rt_deinit(struct scheduler *ops)
xfree(prv);
}
-/*
- * Point per_cpu spinlock to the global system lock;
- * All cpu have same global system lock
- */
-static void
-rt_init_pdata(const struct scheduler *ops, void *pdata, int cpu)
-{
- struct rt_private *prv = rt_priv(ops);
- spinlock_t *old_lock;
- unsigned long flags;
-
- old_lock = pcpu_schedule_lock_irqsave(cpu, &flags);
-
- /*
- * TIMER_STATUS_invalid means we are the first cpu that sees the timer
- * allocated but not initialized, and so it's up to us to initialize it.
- */
- if ( prv->repl_timer.status == TIMER_STATUS_invalid )
- {
- init_timer(&prv->repl_timer, repl_timer_handler, (void *)ops, cpu);
- dprintk(XENLOG_DEBUG, "RTDS: timer initialized on cpu %u\n", cpu);
- }
-
- /* Move the scheduler lock to our global runqueue lock. */
- get_sched_res(cpu)->schedule_lock = &prv->lock;
-
- /* _Not_ pcpu_schedule_unlock(): per_cpu().schedule_lock changed! */
- spin_unlock_irqrestore(old_lock, flags);
-}
-
/* Change the scheduler of cpu to us (RTDS). */
static spinlock_t *
rt_switch_sched(struct scheduler *new_ops, unsigned int cpu,
@@ -1568,7 +1538,6 @@ static const struct scheduler sched_rtds_def = {
.dump_settings = rt_dump,
.init = rt_init,
.deinit = rt_deinit,
- .init_pdata = rt_init_pdata,
.switch_sched = rt_switch_sched,
.deinit_pdata = rt_deinit_pdata,
.alloc_domdata = rt_alloc_domdata,
--
generated by git-patchbot for /home/xen/git/xen.git#master
_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/xen-changelog
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |