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docs: devlink: clarify the scope of snapshot id 

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2020-05-01 09:40:42 -07:00 committed by David S. Miller
parent 043b3e2276
commit aebbd7dfab
1 changed files with 4 additions and 0 deletions
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Documentation/networking/devlink/devlink-region.rst
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@ -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.