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| author | Alberto Garcia | 2019-03-28 17:25:11 +0100 |
|---|---|---|
| committer | Kevin Wolf | 2019-04-02 12:04:44 +0200 |
| commit | d20ba603f2d1462f7c39c6aa1f7e0968a18fda0c (patch) | |
| tree | 93b4e126e2b3a4c2a07b865f444d70602e890844 /scripts/switch-timer-api | |
| parent | block: freeze the backing chain earlier in stream_start() (diff) | |
| download | qemu-d20ba603f2d1462f7c39c6aa1f7e0968a18fda0c.tar.gz qemu-d20ba603f2d1462f7c39c6aa1f7e0968a18fda0c.tar.xz qemu-d20ba603f2d1462f7c39c6aa1f7e0968a18fda0c.zip | |
block: test block-stream with a base node that is used by block-commit
The base node of a block-stream operation indicates the first image
from the backing chain starting from which no data is copied to the
top node.
The block-stream job allows others to use that base image, so a second
block-stream job could be writing to it at the same time. An important
restriction is that the base image must not disappear while the stream
job is ongoing. stream_start() freezes the backing chain from top to
base with that purpose but it does it too late in the code so there is
a race condition there.
This bug was fixed in the previous commit, and this patch contains an
iotest for this scenario.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'scripts/switch-timer-api')
0 files changed, 0 insertions, 0 deletions