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d04c155503
In the "Overlapping multiple requests" cases, the 3rd reqs (the break
point B) doesn't wait for the 2nd, and once resumed the I/O will just
continue. This is because the 2nd is already waiting for the 1st, and
in wait_serialising_requests() there is:
/* If the request is already (indirectly) waiting for us, or
* will wait for us as soon as it wakes up, then just go on
* (instead of producing a deadlock in the former case). */
if (!req->waiting_for) {
/* actually break */
...
}
Consequently, the following "sleep 100; resume A" command races with the
completion of that request, and sometimes results in an unexpected
order of output:
> @@ -56,9 +56,9 @@
> wrote XXX/XXX bytes at offset XXX
> XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> blkdebug: Resuming request 'B'
> +blkdebug: Resuming request 'A'
> wrote XXX/XXX bytes at offset XXX
> XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -blkdebug: Resuming request 'A'
> wrote XXX/XXX bytes at offset XXX
> XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> wrote XXX/XXX bytes at offset XXX
Filter out the "Resuming request" lines to make the output
deterministic.
Reported-by: Patchew <no-reply@patchew.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 20171113150026.4743-1-famz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
161 lines
7.1 KiB
Plaintext
161 lines
7.1 KiB
Plaintext
QA output created by 077
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
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== Some concurrent requests involving RMW ==
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote XXX/XXX bytes at offset XXX
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XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== Verify image content ==
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read 512/512 bytes at offset 0
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 512
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 3072/3072 bytes at offset 1024
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3 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 4096
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 4608
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 5120
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 2560/2560 bytes at offset 5632
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2.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 8192
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 8704
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 9216
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 2560/2560 bytes at offset 9728
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2.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 20480
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 20992
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 21504
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 22016
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 22528
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 23040
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 23552
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 24064
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 24576
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 25088
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 26624
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 30720
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 32256
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 32768
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 33280
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 34816
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 38912
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 40448
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 40960
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 41472
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 43008
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 47104
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 48640
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 49152
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 49664
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 51200
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1536/1536 bytes at offset 55296
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1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 56832
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 57344
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1024/1024 bytes at offset 63488
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1024/1024 bytes at offset 64512
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1024/1024 bytes at offset 65536
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 1024/1024 bytes at offset 66560
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1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 2048/2048 bytes at offset 71680
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2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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No errors were found on the image.
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*** done
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