[kvm-devel] [patch 10/13] QEMU: get rid of aiocb cache

[Marcelo T. <mto...@re...>]

the malloc() implementation should do a decent job at this, simplifies
block device locking.

Index: kvm-userspace.io/qemu/block.c
===================================================================
--- kvm-userspace.io.orig/qemu/block.c
+++ kvm-userspace.io/qemu/block.c
@@ -1447,14 +1447,10 @@ void *qemu_aio_get(BlockDriverState *bs,
     BlockDriverAIOCB *acb;
 
     drv = bs->drv;
-    if (drv->free_aiocb) {
-        acb = drv->free_aiocb;
-        drv->free_aiocb = acb->next;
-    } else {
-        acb = qemu_mallocz(drv->aiocb_size);
-        if (!acb)
-            return NULL;
-    }
+    acb = qemu_mallocz(drv->aiocb_size);
+    if (!acb)
+        return NULL;
+
     acb->bs = bs;
     acb->cb = cb;
     acb->opaque = opaque;
@@ -1464,9 +1460,7 @@ void *qemu_aio_get(BlockDriverState *bs,
 void qemu_aio_release(void *p)
 {
     BlockDriverAIOCB *acb = p;
-    BlockDriver *drv = acb->bs->drv;
-    acb->next = drv->free_aiocb;
-    drv->free_aiocb = acb;
+    qemu_free(p);
 }
 
 /**************************************************************/
Index: kvm-userspace.io/qemu/block_int.h
===================================================================
--- kvm-userspace.io.orig/qemu/block_int.h
+++ kvm-userspace.io/qemu/block_int.h
@@ -85,7 +85,6 @@ struct BlockDriver {
     /* to control generic scsi devices */
     int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf);
 
-    BlockDriverAIOCB *free_aiocb;
     struct BlockDriver *next;
 };
 

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