diff mbox series

[RFC,v4,06/71] cpu: introduce process_queued_cpu_work_locked

Message ID 20181025144644.15464-6-cota@braap.org (mailing list archive)
State New, archived
Headers show
Series [RFC,v4,01/71] cpu: convert queued work to a QSIMPLEQ | expand

Commit Message

Emilio Cota Oct. 25, 2018, 2:45 p.m. UTC 
This completes the conversion to cpu_mutex_lock/unlock in the file.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
---
 cpus-common.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

Comments

Alex Bennée Oct. 29, 2018, 4:35 p.m. UTC | #1 
Emilio G. Cota <cota@braap.org> writes:

> This completes the conversion to cpu_mutex_lock/unlock in the file.
>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Signed-off-by: Emilio G. Cota <cota@braap.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  cpus-common.c | 17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/cpus-common.c b/cpus-common.c
> index 3fccee5585..c2ad554d54 100644
> --- a/cpus-common.c
> +++ b/cpus-common.c
> @@ -337,20 +337,19 @@ void async_safe_run_on_cpu(CPUState *cpu, run_on_cpu_func func,
>      queue_work_on_cpu(cpu, wi);
>  }
>
> -void process_queued_cpu_work(CPUState *cpu)
> +/* Called with the CPU's lock held */
> +static void process_queued_cpu_work_locked(CPUState *cpu)
>  {
>      struct qemu_work_item *wi;
>      bool has_bql = qemu_mutex_iothread_locked();
>
> -    qemu_mutex_lock(&cpu->lock);
>      if (QSIMPLEQ_EMPTY(&cpu->work_list)) {
> -        qemu_mutex_unlock(&cpu->lock);
>          return;
>      }
>      while (!QSIMPLEQ_EMPTY(&cpu->work_list)) {
>          wi = QSIMPLEQ_FIRST(&cpu->work_list);
>          QSIMPLEQ_REMOVE_HEAD(&cpu->work_list, node);
> -        qemu_mutex_unlock(&cpu->lock);
> +        cpu_mutex_unlock(cpu);
>          if (wi->exclusive) {
>              /* Running work items outside the BQL avoids the following deadlock:
>               * 1) start_exclusive() is called with the BQL taken while another
> @@ -376,13 +375,19 @@ void process_queued_cpu_work(CPUState *cpu)
>                  qemu_mutex_unlock_iothread();
>              }
>          }
> -        qemu_mutex_lock(&cpu->lock);
> +        cpu_mutex_lock(cpu);
>          if (wi->free) {
>              g_free(wi);
>          } else {
>              atomic_mb_set(&wi->done, true);
>          }
>      }
> -    qemu_mutex_unlock(&cpu->lock);
>      qemu_cond_broadcast(&cpu->cond);
>  }
> +
> +void process_queued_cpu_work(CPUState *cpu)
> +{
> +    cpu_mutex_lock(cpu);
> +    process_queued_cpu_work_locked(cpu);
> +    cpu_mutex_unlock(cpu);
> +}


--
Alex Bennée
diff mbox series

Patch

diff --git a/cpus-common.c b/cpus-common.c
index 3fccee5585..c2ad554d54 100644
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -337,20 +337,19 @@  void async_safe_run_on_cpu(CPUState *cpu, run_on_cpu_func func,
     queue_work_on_cpu(cpu, wi);
 }
 
-void process_queued_cpu_work(CPUState *cpu)
+/* Called with the CPU's lock held */
+static void process_queued_cpu_work_locked(CPUState *cpu)
 {
     struct qemu_work_item *wi;
     bool has_bql = qemu_mutex_iothread_locked();
 
-    qemu_mutex_lock(&cpu->lock);
     if (QSIMPLEQ_EMPTY(&cpu->work_list)) {
-        qemu_mutex_unlock(&cpu->lock);
         return;
     }
     while (!QSIMPLEQ_EMPTY(&cpu->work_list)) {
         wi = QSIMPLEQ_FIRST(&cpu->work_list);
         QSIMPLEQ_REMOVE_HEAD(&cpu->work_list, node);
-        qemu_mutex_unlock(&cpu->lock);
+        cpu_mutex_unlock(cpu);
         if (wi->exclusive) {
             /* Running work items outside the BQL avoids the following deadlock:
              * 1) start_exclusive() is called with the BQL taken while another
@@ -376,13 +375,19 @@  void process_queued_cpu_work(CPUState *cpu)
                 qemu_mutex_unlock_iothread();
             }
         }
-        qemu_mutex_lock(&cpu->lock);
+        cpu_mutex_lock(cpu);
         if (wi->free) {
             g_free(wi);
         } else {
             atomic_mb_set(&wi->done, true);
         }
     }
-    qemu_mutex_unlock(&cpu->lock);
     qemu_cond_broadcast(&cpu->cond);
 }
+
+void process_queued_cpu_work(CPUState *cpu)
+{
+    cpu_mutex_lock(cpu);
+    process_queued_cpu_work_locked(cpu);
+    cpu_mutex_unlock(cpu);
+}