While we look at the fixes for 2.11, I briefly prototyped this series to see if
it makes sense as a simplification of the drain API for 2.12.
The idea is to let AioContext manage quiesce callbacks, then the block layer
only needs to do the in-flight request waiting. This lets us get rid of the
callback recursion (both up and down).
Many commit logs and code comments are definitely missing, but it would be good
to get high level review and maybe some testing already.
Fam
Fam Zheng (9):
block: Remove unused bdrv_requests_pending
aio: Add drain begin/end API to AioContext
blockjob: Implement AioContext drain ops
throttle: Implement AioContext drain ops
qed: Implement AioContext drain ops
block: Use aio_context_drained_begin in bdrv_set_aio_context
block: Switch to use AIO drained begin/end API
block: Drop old drained_{begin,end} callbacks
blockjob: Drop unused functions
block.c | 30 +--------
block/block-backend.c | 22 -------
block/io.c | 134 +++--------------------------------------
block/qed.c | 34 ++++++++---
block/throttle.c | 34 ++++++++---
blockjob.c | 67 ++++++++-------------
include/block/aio.h | 27 ++++++++-
include/block/block.h | 16 -----
include/block/block_int.h | 12 ----
include/block/blockjob_int.h | 14 -----
include/sysemu/block-backend.h | 8 ---
util/async.c | 73 ++++++++++++++++++++++
12 files changed, 186 insertions(+), 285 deletions(-)
--
2.14.3
