[0/4] block-backend: Queue requests while drained

Message

Kevin Wolf July 25, 2019, 4:27 p.m. UTC

This series fixes the problem that devices like IDE, which submit
requests as a direct result of I/O from the CPU thread, can continue to
submit new requests even in a drained section.

In order to avoid a dependency for this series, I borrowed a patch from
Max.

Kevin Wolf (3):
  block: Remove blk_pread_unthrottled()
  mirror: Keep target drained until graph changes are done
  block-backend: Queue requests while drained

Max Reitz (1):
  block: Reduce (un)drains when replacing a child

 include/sysemu/block-backend.h | 13 +++---
 block.c                        | 49 +++++++++++++-------
 block/backup.c                 |  1 +
 block/block-backend.c          | 85 +++++++++++++++++++++++-----------
 block/commit.c                 |  2 +
 block/mirror.c                 | 20 ++++----
 blockjob.c                     |  3 ++
 hw/block/hd-geometry.c         |  7 +--
 tests/test-bdrv-drain.c        |  1 +
 9 files changed, 118 insertions(+), 63 deletions(-)