[Qemu-devel] [PATCH 08/13] block/linux-aio.c: allocate events dynamically

[Ming Lei <ming.lei@canonical.com>]

This patch allocates events array of 'struct qemu_laio_state'
dynamically so that in the following patch we can allocate
resource elasticly in case of AioContext wide IO submission
as batch.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
---
 block/linux-aio.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/linux-aio.c b/block/linux-aio.c
index c5c7944..5be8036 100644
--- a/block/linux-aio.c
+++ b/block/linux-aio.c
@@ -67,7 +67,7 @@ struct qemu_laio_state {
 
     /* I/O completion processing */
     QEMUBH *completion_bh;
-    struct io_event events[MAX_EVENTS];
+    struct io_event *events;
     int event_idx;
     int event_max;
 
@@ -409,6 +409,7 @@ static struct qemu_laio_state *laio_state_alloc(AioContext *context)
         goto out_close_efd;
     }
 
+    s->events = g_malloc(sizeof(*s->events) * MAX_EVENTS);
     s->io_q = laio_alloc_ioq(context, s);
     s->completion_bh = aio_bh_new(context, qemu_laio_completion_bh, s);
     aio_set_event_notifier(context, &s->e, qemu_laio_completion_cb);
@@ -429,6 +430,7 @@ static void laio_state_free(struct qemu_laio_state *s, AioContext *context)
 
     laio_free_ioq(s, s->io_q);
     event_notifier_cleanup(&s->e);
+    g_free(s->events);
 
     if (io_destroy(s->ctx) != 0) {
         fprintf(stderr, "%s: destroy AIO context %p failed\n",
-- 
1.7.9.5