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throttle: Extract timers from ThrottleState into a separate structure

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Group throttling will share ThrottleState between multiple bs.
As a consequence the ThrottleState will be accessed by multiple aio
context.

Timers are tied to their aio context so they must go out of the
ThrottleState structure.

This commit paves the way for each bs of a common ThrottleState to
have its own timer.

Signed-off-by: Benoit Canet <benoit.canet@nodalink.com>
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 6cf9ea96d8b32ae2f8769cead38f68a6a0c8c909.1433779731.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Benoît Canet 2015-06-08 18:17:41 +02:00 • committed by Stefan Hajnoczi
parent f4a769abaa
commit 0e5b0a2d54
6 changed files with 135 additions and 94 deletions
Download patch file Download diff file Expand all files Collapse all files

11
block.c
View file

@ -1825,6 +1825,9 @@ static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
memcpy(&bs_dest->throttle_state,
&bs_src->throttle_state,
sizeof(ThrottleState));
memcpy(&bs_dest->throttle_timers,
&bs_src->throttle_timers,
sizeof(ThrottleTimers));
bs_dest->throttled_reqs[0] = bs_src->throttled_reqs[0];
bs_dest->throttled_reqs[1] = bs_src->throttled_reqs[1];
bs_dest->io_limits_enabled = bs_src->io_limits_enabled;
@ -1886,7 +1889,7 @@ void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old)
assert(QLIST_EMPTY(&bs_new->dirty_bitmaps));
assert(bs_new->job == NULL);
assert(bs_new->io_limits_enabled == false);
assert(!throttle_have_timer(&bs_new->throttle_state));
assert(!throttle_timers_are_initialized(&bs_new->throttle_timers));
tmp = *bs_new;
*bs_new = *bs_old;
@ -1903,7 +1906,7 @@ void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old)
/* Check a few fields that should remain attached to the device */
assert(bs_new->job == NULL);
assert(bs_new->io_limits_enabled == false);
assert(!throttle_have_timer(&bs_new->throttle_state));
assert(!throttle_timers_are_initialized(&bs_new->throttle_timers));
/* insert the nodes back into the graph node list if needed */
if (bs_new->node_name[0] != '\0') {
@ -3691,7 +3694,7 @@ void bdrv_detach_aio_context(BlockDriverState *bs)
}
if (bs->io_limits_enabled) {
throttle_detach_aio_context(&bs->throttle_state);
throttle_timers_detach_aio_context(&bs->throttle_timers);
}
if (bs->drv->bdrv_detach_aio_context) {
bs->drv->bdrv_detach_aio_context(bs);
@ -3727,7 +3730,7 @@ void bdrv_attach_aio_context(BlockDriverState *bs,
bs->drv->bdrv_attach_aio_context(bs, new_context);
}
if (bs->io_limits_enabled) {
throttle_attach_aio_context(&bs->throttle_state, new_context);
throttle_timers_attach_aio_context(&bs->throttle_timers, new_context);
}
QLIST_FOREACH(ban, &bs->aio_notifiers, list) {