Re: [RFC PATCH v3 2/5] ndctl: monitor: add ndctl create-monitor command
On Tue, Feb 13, 2018 at 2:12 AM, Yasunori Goto <y-goto(a)jp.fujitsu.com> wrote:
> Hi,
[..]
I would like to ask one more thing.
What should nvdimm daemon do on detected events of bus/region/namespace/dimm ?
IIRC, udev handles such hotplug events.
What is relationship/roles between nvdimm daemon and udev?
UDEV handles the hotplug events, but I imagine device topology changes
are of interest to whatever agent is going to be consuming monitor
events, or monitoring changes that an administrator makes to a
machine. My inspiration for including these events in the monitor
comes from the monitor functionality in mdadm. It has events like:
DeviceDisappeared
RebuildStarted
RebuildNN
RebuildFinished
Fail
FailSpare
SpareActive
NewArray
DegradedArray
MoveSpare
SparesMissing
To be clear, I'm not suggesting that all of these events need to be
supported in the first implementation of the monitor, but I want the
architecture and the user interface to be ready to support events from
any device in the topology.