[Xen-devel] [RFC PATCH 2/3] Dynamically allocate domain->evtchn, also bump EVTCHNS_PER_BUCKET to 512.

[Wei Liu <wei.liu2@xxxxxxxxxx>]

From: Wei Liu <liuw@xxxxxxxxx>


Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/common/event_channel.c |    8 ++++++++
 xen/include/xen/sched.h    |    4 ++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/xen/common/event_channel.c b/xen/common/event_channel.c
index 87e422e..9898f8e 100644
--- a/xen/common/event_channel.c
+++ b/xen/common/event_channel.c
@@ -1172,6 +1172,12 @@ void notify_via_xen_event_channel(struct domain *ld, int 
lport)
 
 int evtchn_init(struct domain *d)
 {
+    d->evtchn = (struct evtchn **)
+        xzalloc_array(struct evtchn *, NR_EVTCHN_BUCKETS);
+
+    if ( !d->evtchn )
+        return -ENOMEM;
+
     spin_lock_init(&d->event_lock);
     d->evtchn_level = 2;
     if ( get_free_port(d) != 0 )
@@ -1215,6 +1221,8 @@ void evtchn_destroy(struct domain *d)
     spin_unlock(&d->event_lock);
 
     clear_global_virq_handlers(d);
+
+    xfree(d->evtchn);
 }
 
 
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index 1c43e0a..5f23213 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -63,7 +63,7 @@ extern struct domain *dom0;
             };                                  \
             __v;})
 
-#define EVTCHNS_PER_BUCKET 128
+#define EVTCHNS_PER_BUCKET 512
 #define NR_EVTCHN_BUCKETS  (NR_EVENT_CHANNELS / EVTCHNS_PER_BUCKET)
 
 struct evtchn
@@ -272,7 +272,7 @@ struct domain
     spinlock_t       rangesets_lock;
 
     /* Event channel information. */
-    struct evtchn   *evtchn[NR_EVTCHN_BUCKETS];
+    struct evtchn  **evtchn;
     spinlock_t       event_lock;
     unsigned int     evtchn_level;
 
-- 
1.7.10.4


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