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authorAlberto Garcia <berto@igalia.com>2015-11-04 15:15:36 +0200
committerKevin Wolf <kwolf@redhat.com>2015-11-11 16:25:47 +0100
commita0d64a61db602696f4f1895a890c65eda5b3b618 (patch)
treea448fb1c4f0a3b60b0fb09f0bd81beab9ef748db /block.c
parent5ac724184c286b367525035eabf4b8bb4a386c54 (diff)
downloadqemu-arm-a0d64a61db602696f4f1895a890c65eda5b3b618.tar.gz
throttle: Use bs->throttle_state instead of bs->io_limits_enabled
There are two ways to check for I/O limits in a BlockDriverState: - bs->throttle_state: if this pointer is not NULL, it means that this BDS is member of a throttling group, its ThrottleTimers structure has been initialized and its I/O limits are ready to be applied. - bs->io_limits_enabled: if true it means that the throttle_state pointer is valid _and_ the limits are currently enabled. The latter is used in several places to check whether a BDS has I/O limits configured, but what it really checks is whether requests are being throttled or not. For example, io_limits_enabled can be temporarily set to false in cases like bdrv_read_unthrottled() without otherwise touching the throtting configuration of that BDS. This patch replaces bs->io_limits_enabled with bs->throttle_state in all cases where what we really want to check is the existence of I/O limits, not whether they are currently enabled or not. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r--block.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/block.c b/block.c
index 34935015dd..cffac75016 100644
--- a/block.c
+++ b/block.c
@@ -1907,7 +1907,7 @@ void bdrv_close(BlockDriverState *bs)
}
/* Disable I/O limits and drain all pending throttled requests */
- if (bs->io_limits_enabled) {
+ if (bs->throttle_state) {
bdrv_io_limits_disable(bs);
}
@@ -3712,7 +3712,7 @@ void bdrv_detach_aio_context(BlockDriverState *bs)
baf->detach_aio_context(baf->opaque);
}
- if (bs->io_limits_enabled) {
+ if (bs->throttle_state) {
throttle_timers_detach_aio_context(&bs->throttle_timers);
}
if (bs->drv->bdrv_detach_aio_context) {
@@ -3748,7 +3748,7 @@ void bdrv_attach_aio_context(BlockDriverState *bs,
if (bs->drv->bdrv_attach_aio_context) {
bs->drv->bdrv_attach_aio_context(bs, new_context);
}
- if (bs->io_limits_enabled) {
+ if (bs->throttle_state) {
throttle_timers_attach_aio_context(&bs->throttle_timers, new_context);
}