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[Qemu-block] [PATCH v3 00/14] block: Move I/O throttling to BlockBackend
From: |
Kevin Wolf |
Subject: |
[Qemu-block] [PATCH v3 00/14] block: Move I/O throttling to BlockBackend |
Date: |
Wed, 11 May 2016 15:24:11 +0200 |
This is another feature that was "logically" part of the BlockBackend, but
implemented as a BlockDriverState feature. It was always kept on top using
swap_feature_fields().
This series moves it to be actually implemented in the BlockBackend, removing
another obstacle for removing bs->blk and allowing multiple BBs per BDS.
Applies to block-next.
v3:
- Patch 5: 'block: Move throttling fields from BDS to BB'
Fixed a few commentions still mentioning BDS instead of BB [Berto]
- Patch 9: 'block: Drain throttling queue with BdrvChild'
Documented the semantics of BdrvChildRole.drained_begin/end [Stefan]
- Patch 10 (new): 'block/io: Quiesce parents between drained_begin/end'
Fix that parent requests were allowed again too early [Stefan]
- Patch 14 (was 13): 'block: Don't check throttled reqs in
bdrv_requests_pending()'
Explained more cases in the commit message [Berto]
v2:
- Rebased on top of Paolo's 'bdrv_flush_io_queue removal, shared LinuxAioState'
Most notable this includes a complete rewrite of patch 9 (was 10): 'block:
Drain throttling queue with BdrvChild'. Instead of a single drain_queue()
callback we now have a drained_begin/end() pair.
- Patch 2 (was 3): 'block: Introduce BlockBackendPublic'
Add int dummy to yet empty struct BlockBackendPublic [Eric]
- Patch 11: 'block: Remove bdrv_move_feature_fields()'
After the rebase, the function ended up empty, we can remove it now
- Patch 12: 'Revert "block: Forbid I/O throttling on nodes with
multiple parents for 2.6"'
This was committed to master after v1 had been posted, so this one is new as
well. The reason for forbidding this was that patch 6 ('block: Move actual
I/O throttling to BlockBackend') would change the behaviour of the non-BB
parents. Now that the final behaviour is implemented, we can allow the setup.
Kevin Wolf (14):
block: Make sure throttled BDSes always have a BB
block: Introduce BlockBackendPublic
block: throttle-groups: Use BlockBackend pointers internally
block: Convert throttle_group_get_name() to BlockBackend
block: Move throttling fields from BDS to BB
block: Move actual I/O throttling to BlockBackend
block: Move I/O throttling configuration functions to BlockBackend
block: Introduce BdrvChild.opaque
block: Drain throttling queue with BdrvChild callback
block/io: Quiesce parents between drained_begin/end
block: Decouple throttling from BlockDriverState
block: Remove bdrv_move_feature_fields()
Revert "block: Forbid I/O throttling on nodes with multiple parents
for 2.6"
block: Don't check throttled reqs in bdrv_requests_pending()
block.c | 58 +---------
block/block-backend.c | 135 ++++++++++++++++++----
block/io.c | 86 ++++----------
block/qapi.c | 6 +-
block/throttle-groups.c | 244 +++++++++++++++++++++-------------------
blockdev.c | 50 +++-----
include/block/block.h | 4 -
include/block/block_int.h | 35 ++----
include/block/throttle-groups.h | 14 +--
include/sysemu/block-backend.h | 27 +++++
tests/test-throttle.c | 62 +++++-----
11 files changed, 359 insertions(+), 362 deletions(-)
--
1.8.3.1
- [Qemu-block] [PATCH v3 00/14] block: Move I/O throttling to BlockBackend,
Kevin Wolf <=
- [Qemu-block] [PATCH v3 02/14] block: Introduce BlockBackendPublic, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 01/14] block: Make sure throttled BDSes always have a BB, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 06/14] block: Move actual I/O throttling to BlockBackend, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 04/14] block: Convert throttle_group_get_name() to BlockBackend, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 03/14] block: throttle-groups: Use BlockBackend pointers internally, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 05/14] block: Move throttling fields from BDS to BB, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 07/14] block: Move I/O throttling configuration functions to BlockBackend, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 09/14] block: Drain throttling queue with BdrvChild callback, Kevin Wolf, 2016/05/11
- [Qemu-block] [PATCH v3 08/14] block: Introduce BdrvChild.opaque, Kevin Wolf, 2016/05/11