On Wed, May 27, 2020 at 02:36:42PM -0700, Jakub Kicinski wrote:

On Wed, 27 May 2020 03:19:18 +0000 Luis Chamberlain wrote:

quoted

I read your patch, and granted, I will accept I was under the incorrect
assumption that this can only be used by networking devices, however it
the devlink approach achieves getting userspace the ability with
iproute2 devlink util to query a device health, on to which we can peg
firmware health. But *this* patch series is not about health status and
letting users query it, its about a *critical* situation which has come up
with firmware requiring me to reboot my system, and the lack of *any*
infrastructure in the kernel today to inform userspace about it.

So say we use netlink to report a critical health situation, how are we
informing userspace with your patch series about requring a reboot?

One of main features of netlink is pub/sub model of notifications.

Whatever you imagine listening to your uevent can listen to
devlink-health notifications via devlink. 

In fact I've shown this off in the RFC patches I sent to you, see 
the devlink mon health command being used.

Yes but I looked at iputils2 devlink and seems I made an incorrect
assumption this can only be used for a network device rather than
a struct device.

I'll take a second look.

  Luis