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[Qemu-devel] [PATCH v4 0/7] Block Throttle Group Support
From: |
Alberto Garcia |
Subject: |
[Qemu-devel] [PATCH v4 0/7] Block Throttle Group Support |
Date: |
Thu, 26 Mar 2015 19:24:54 +0200 |
A new version of the patchset.
Here was the previous one:
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg01990.html
I checked all the things pointed out by Stefan in his comments and I
think all of them are fixed now.
In addition to that I detected and fixed some additional problems.
Here's the detailed list of changes:
- All functions from the ThrottleGroup API now receive a BlockDriverState.
This simplifies the API a bit more and makes it more consistent.
- The creation/destruction of ThrottleTimers is now handled internally
when a BlockDriverState is added/removed from a group, since there's
not much point on keeping them separate. This also hides the timer
callbacks from the outside, which makes things a bit nicer and
easier for some of the other changes included in these series.
- bdrv_io_limits_enable() no longer accepts NULL as a valid group name.
- No member of a group can access someone else's throttled_reqs queues
anymore since there's no safe way to do it. A new (protected) field
in BDS called pending_reqs serves that purpose now.
- No member of a group can access someone else's timers unless they
have queued requests. A new field in ThrottleGroup called
any_timer_armed serves that purpose. This allows changing a BDS's
AioContext without having to remove it from the group. Otherwise
it's not safe to call bdrv_set_aio_context().
- After a timer is fired make sure that there was actually a request
in the queue, and schedule a new one otherwise. This is an unlikely
corner case that I detected while preparing these series.
- New throttle_group_lock/unlock functions. These are only needed for
the case of bdrv_swap(), which is not easy to rewrite in a way that
does not crash without locking the group.
- throttle_group_co_io_limits_intercept() is now marked as a coroutine
function.
- Documentation updates.
Regards,
Berto
Alberto Garcia (6):
throttle: Add throttle group infrastructure
throttle: Add throttle group infrastructure tests
throttle: Add throttle group support
throttle: acquire the ThrottleGroup lock in bdrv_swap()
throttle: add the name of the ThrottleGroup to BlockDeviceInfo
throttle: Update throttle infrastructure copyright
BenoƮt Canet (1):
throttle: Extract timers from ThrottleState into a separate structure
block.c | 101 ++++-----
block/Makefile.objs | 1 +
block/qapi.c | 8 +-
block/throttle-groups.c | 478 ++++++++++++++++++++++++++++++++++++++++
blockdev.c | 22 +-
hmp.c | 10 +-
include/block/block.h | 3 +-
include/block/block_int.h | 7 +-
include/block/throttle-groups.h | 46 ++++
include/qemu/throttle.h | 46 ++--
qapi/block-core.json | 8 +-
qemu-options.hx | 1 +
qmp-commands.hx | 3 +-
tests/test-throttle.c | 119 ++++++----
util/throttle.c | 81 ++++---
15 files changed, 778 insertions(+), 156 deletions(-)
create mode 100644 block/throttle-groups.c
create mode 100644 include/block/throttle-groups.h
--
2.1.4
- [Qemu-devel] [PATCH v4 0/7] Block Throttle Group Support,
Alberto Garcia <=
- [Qemu-devel] [PATCH 2/7] throttle: Add throttle group infrastructure, Alberto Garcia, 2015/03/26
- [Qemu-devel] [PATCH 1/7] throttle: Extract timers from ThrottleState into a separate structure, Alberto Garcia, 2015/03/26
- [Qemu-devel] [PATCH 6/7] throttle: add the name of the ThrottleGroup to BlockDeviceInfo, Alberto Garcia, 2015/03/26
- [Qemu-devel] [PATCH 4/7] throttle: Add throttle group support, Alberto Garcia, 2015/03/26
- [Qemu-devel] [PATCH 5/7] throttle: acquire the ThrottleGroup lock in bdrv_swap(), Alberto Garcia, 2015/03/26
- [Qemu-devel] [PATCH 7/7] throttle: Update throttle infrastructure copyright, Alberto Garcia, 2015/03/26
- [Qemu-devel] [PATCH 3/7] throttle: Add throttle group infrastructure tests, Alberto Garcia, 2015/03/26
- Re: [Qemu-devel] [PATCH v4 0/7] Block Throttle Group Support, Alberto Garcia, 2015/03/26