Observing block layer aio readv/writev operations is useful for
debugging image formats or understanding guest disk I/O patterns.
Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com>
---
block.c | 4 ++++
trace-events | 2 ++
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index ebbc376..a19374d 100644
--- a/block.c
+++ b/block.c
@@ -1983,6 +1983,8 @@ BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs,
int64_t sector_num,
BlockDriver *drv = bs->drv;
BlockDriverAIOCB *ret;
+ trace_bdrv_aio_readv(bs, sector_num, nb_sectors, opaque);
+
if (!drv)
return NULL;
if (bdrv_check_request(bs, sector_num, nb_sectors))
@@ -2007,6 +2009,8 @@ BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs,
int64_t sector_num,
BlockDriver *drv = bs->drv;
BlockDriverAIOCB *ret;
+ trace_bdrv_aio_writev(bs, sector_num, nb_sectors, opaque);
+
if (!drv)
return NULL;
if (bs->read_only)
diff --git a/trace-events b/trace-events
index b43317e..4300178 100644
--- a/trace-events
+++ b/trace-events
@@ -51,6 +51,8 @@ disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d"
disable bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb
%p num_callbacks %d num_reqs %d"
disable bdrv_aio_multiwrite_earlyfail(void *mcb) "mcb %p"
disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d"
+disable bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void
*opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
+disable bdrv_aio_writev(void *bs, int64_t sector_num, int nb_sectors, void
*opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
# hw/virtio-blk.c
disable virtio_blk_req_complete(void *req, int status) "req %p status %d"
--
1.7.1
