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| author | Mikulas Patocka <mpatocka@redhat.com> | 2015-12-02 12:32:49 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2018-01-17 09:16:06 -0500 |
| commit | 424da29c5a85adfcc1eda9412516efd77355d469 (patch) | |
| tree | 277c029ce3bab9efd984794cf7c08c67bce0ead9 /Documentation/device-mapper/snapshot.txt | |
| parent | f6e7baadd96bd746d3fb584959d3f152189d05e1 (diff) | |
| download | linux-424da29c5a85adfcc1eda9412516efd77355d469.tar.bz2 | |
dm snapshot: improve documentation relative to origin suspend requirements
Add a note to snapshot.txt that the origin target must be suspended when
loading or unloading the snapshot target.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'Documentation/device-mapper/snapshot.txt')
| -rw-r--r-- | Documentation/device-mapper/snapshot.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/device-mapper/snapshot.txt b/Documentation/device-mapper/snapshot.txt index ad6949bff2e3..b8bbb516f989 100644 --- a/Documentation/device-mapper/snapshot.txt +++ b/Documentation/device-mapper/snapshot.txt @@ -49,6 +49,10 @@ The difference between persistent and transient is with transient snapshots less metadata must be saved on disk - they can be kept in memory by the kernel. +When loading or unloading the snapshot target, the corresponding +snapshot-origin or snapshot-merge target must be suspended. A failure to +suspend the origin target could result in data corruption. + * snapshot-merge <origin> <COW device> <persistent> <chunksize> |