X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=qemu-coroutine.c;h=25a14c605db5acea79ded776b33153d039725e43;hb=dbcdd7cb04595cc0015f2dba6be751faa63fab00;hp=600be2643c7cf0efa59fdd7ef1a4266eade30d8e;hpb=00dccaf1f848290d979a4b1e6248281ce1b32aaa;p=qemu.git

diff --git a/qemu-coroutine.c b/qemu-coroutine.c
index 600be2643..25a14c605 100644
--- a/qemu-coroutine.c
+++ b/qemu-coroutine.c
@@ -14,16 +14,57 @@
 
 #include "trace.h"
 #include "qemu-common.h"
-#include "qemu-coroutine.h"
-#include "qemu-coroutine-int.h"
+#include "block/coroutine.h"
+#include "block/coroutine_int.h"
+
+enum {
+    /* Maximum free pool size prevents holding too many freed coroutines */
+    POOL_MAX_SIZE = 64,
+};
+
+/** Free list to speed up creation */
+static QSLIST_HEAD(, Coroutine) pool = QSLIST_HEAD_INITIALIZER(pool);
+static unsigned int pool_size;
 
 Coroutine *qemu_coroutine_create(CoroutineEntry *entry)
 {
-    Coroutine *co = qemu_coroutine_new();
+    Coroutine *co;
+
+    co = QSLIST_FIRST(&pool);
+    if (co) {
+        QSLIST_REMOVE_HEAD(&pool, pool_next);
+        pool_size--;
+    } else {
+        co = qemu_coroutine_new();
+    }
+
     co->entry = entry;
     return co;
 }
 
+static void coroutine_delete(Coroutine *co)
+{
+    if (pool_size < POOL_MAX_SIZE) {
+        QSLIST_INSERT_HEAD(&pool, co, pool_next);
+        co->caller = NULL;
+        pool_size++;
+        return;
+    }
+
+    qemu_coroutine_delete(co);
+}
+
+static void __attribute__((destructor)) coroutine_cleanup(void)
+{
+    Coroutine *co;
+    Coroutine *tmp;
+
+    QSLIST_FOREACH_SAFE(co, &pool, pool_next, tmp) {
+        QSLIST_REMOVE_HEAD(&pool, pool_next);
+        qemu_coroutine_delete(co);
+    }
+}
+
 static void coroutine_swap(Coroutine *from, Coroutine *to)
 {
     CoroutineAction ret;
@@ -35,7 +76,7 @@ static void coroutine_swap(Coroutine *from, Coroutine *to)
         return;
     case COROUTINE_TERMINATE:
         trace_qemu_coroutine_terminate(to);
-        qemu_coroutine_delete(to);
+        coroutine_delete(to);
         return;
     default:
         abort();