From 441565b2792d4ee9ee1928a8d14538be39211292 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Mon, 21 Mar 2016 13:30:30 +0100 Subject: block: Move actual I/O throttling to BlockBackend Signed-off-by: Kevin Wolf Reviewed-by: Alberto Garcia Acked-by: Stefan Hajnoczi --- block/block-backend.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'block/block-backend.c') diff --git a/block/block-backend.c b/block/block-backend.c index 6880659665..730b8a9949 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -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; } -- cgit v1.2.3