On 2014-10-21 at 13:03, Stefan Hajnoczi wrote:
Block jobs will run in the BlockDriverState's AioContext, which may not
always be the QEMU main loop.
There are some block layer APIs that are either not thread-safe or risk
lock ordering problems. This includes bdrv_unref(), bdrv_close(), and
anything that calls bdrv_drain_all().
The block_job_defer_to_main_loop() API allows a block job to schedule a
function to run in the main loop with the BlockDriverState AioContext
held.
This function will be used to perform cleanup and backing chain
manipulations in block jobs.
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
blockjob.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
include/block/blockjob.h | 19 +++++++++++++++++++
2 files changed, 64 insertions(+)
Reviewed-by: Max Reitz <mre...@redhat.com>
