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block: Move actual I/O throttling to BlockBackend

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2016-03-21 13:30:30 +01:00
parent 27ccdd5259
commit 441565b279
4 changed files with 13 additions and 14 deletions
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10
block/block-backend.c
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@ -716,6 +716,11 @@ static int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
return ret;
}
/* throttling disk I/O */
if (blk->public.throttle_state) {
throttle_group_co_io_limits_intercept(blk, bytes, false);
}
return bdrv_co_preadv(blk_bs(blk), offset, bytes, qiov, flags);
}
@ -730,6 +735,11 @@ static int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
return ret;
}
/* throttling disk I/O */
if (blk->public.throttle_state) {
throttle_group_co_io_limits_intercept(blk, bytes, true);
}
if (!blk->enable_write_cache) {
flags |= BDRV_REQ_FUA;
}