28.03.2019 19:25, Alberto Garcia wrote: > 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 <be...@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> -- Best regards, Vladimir
