245a83f1e18acf9348aac3c3 parent 9d3b15c4c776b041f9ee81810cbd375275411829 author Mikulas Patocka 1260489152 +0000 committer Alasdair G Kergon 1260489152 +0000 dm snapshot: add merging Merging is started when origin is resumed and it is stopped when origin is suspended or when the merging snapshot is destroyed or errors are detected. Merging is not yet interlocked with writes: this will be handled in subsequent patches. The code relies on callbacks from a private kcopyd thread. Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer Signed-off-by: Alasdair G Kergon