On Tue, Aug 27, 2013 at 05:55:26PM -0500, Yaodong Yang wrote:
> Step 3:
> file block.c
> function：
> static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs,
>int64_t sector_num,
>QEMUIOVecto
I checked the argument, it looks like the same.
I guess my confusion is the follows:
code version: qemu-1.5.1
step 1:
file: block-migration.c,
function: static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds)
Inside this function, qemu calls the following function to read a
On Mon, Aug 26, 2013 at 09:59:51PM -0500, Yaodong Yang wrote:
> In sum, the bdrv_co_do_readv() seems to be executed inside two thread, the
> migration thread and native iothread. Both of them executed the function
> twice for a single request. Could someone explain it for me ? I appreciate it
>
In the block-migration period, each chunk of data is read by bdrv_aio_readv(),
then bdrv_co_aio_rw_vector() , then bdrv_co_do_rw().
Inside the bdrv_co_do_rw() function, the bdrv_co_do_readv() function is called
twice. and exit without finish the execution of the bdrv_co_do_readv()
function. Al
