[PATCH net-next v4 3/3] docs: devlink: clarify the scope of snapshot id

[Jakub Kicinski <kuba@kernel.org>]

In past discussions Jiri explained snapshot ids are cross-region.
Explain this in the docs.

v3: new patch

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
---
 Documentation/networking/devlink/devlink-region.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-region.rst b/Documentation/networking/devlink/devlink-region.rst
index daf35427fce1..3654c3e9658f 100644
--- a/Documentation/networking/devlink/devlink-region.rst
+++ b/Documentation/networking/devlink/devlink-region.rst
@@ -14,6 +14,10 @@ Region snapshots are collected by the driver, and can be accessed via read
 or dump commands. This allows future analysis on the created snapshots.
 Regions may optionally support triggering snapshots on demand.
 
+Snapshot identifiers are scoped to the devlink instance, not a region.
+All snapshots with the same snapshot id within a devlink instance
+correspond to the same event.
+
 The major benefit to creating a region is to provide access to internal
 address regions that are otherwise inaccessible to the user.
 
-- 
2.25.4