From ddc4115efdfa6619689fe18871aa2d37890b3463 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Tue, 24 Apr 2018 13:35:27 +0100 Subject: block/mirror: honor ratelimit again Commit b76e4458b1eb3c32e9824fe6aa51f67d2b251748 ("block/mirror: change the semantic of 'force' of block-job-cancel") accidentally removed the ratelimit in the mirror job. Reintroduce the ratelimit but keep the block-job-cancel force=true behavior that was added in commit b76e4458b1eb3c32e9824fe6aa51f67d2b251748. Note that block_job_sleep_ns() returns immediately when the job is cancelled. Therefore it's safe to unconditionally call block_job_sleep_ns() - a cancelled job does not sleep. This commit fixes the non-deterministic qemu-iotests 185 output. The test relies on the ratelimit to make the job sleep until the 'quit' command is processed. Previously the job could complete before the 'quit' command was received since there was no ratelimit. Cc: Liang Li Cc: Jeff Cody Cc: Kevin Wolf Signed-off-by: Stefan Hajnoczi Message-id: 20180424123527.19168-1-stefanha@redhat.com Signed-off-by: Jeff Cody --- block/mirror.c | 8 +++++--- tests/qemu-iotests/185.out | 2 +- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/block/mirror.c b/block/mirror.c index 820f512c7b..9436a8d5ee 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -868,12 +868,14 @@ static void coroutine_fn mirror_run(void *opaque) } ret = 0; + + if (s->synced && !should_complete) { + delay_ns = (s->in_flight == 0 && cnt == 0 ? SLICE_TIME : 0); + } trace_mirror_before_sleep(s, cnt, s->synced, delay_ns); + block_job_sleep_ns(&s->common, delay_ns); if (block_job_is_cancelled(&s->common) && s->common.force) { break; - } else if (!should_complete) { - delay_ns = (s->in_flight == 0 && cnt == 0 ? SLICE_TIME : 0); - block_job_sleep_ns(&s->common, delay_ns); } s->last_pause_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); } diff --git a/tests/qemu-iotests/185.out b/tests/qemu-iotests/185.out index 2c4b04de73..992162f418 100644 --- a/tests/qemu-iotests/185.out +++ b/tests/qemu-iotests/185.out @@ -36,9 +36,9 @@ Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 backing_file=TEST_DIR/t.q {"return": {}} Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=67108864 cluster_size=65536 lazy_refcounts=off refcount_bits=16 {"return": {}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "disk", "len": 4194304, "offset": 4194304, "speed": 65536, "type": "mirror"}} {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "disk", "len": 4194304, "offset": 4194304, "speed": 65536, "type": "mirror"}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "disk", "len": 4194304, "offset": 4194304, "speed": 65536, "type": "mirror"}} === Start backup job and exit qemu === -- cgit v1.2.1