On Fri, 2020-05-22 at 10:17 -0700, Jakub Kicinski wrote: > > > --- a/net/core/Makefile > > > +++ b/net/core/Makefile > > > @@ -31,7 +31,7 @@ obj-$(CONFIG_LWTUNNEL_BPF) += lwt_bpf.o > > > obj-$(CONFIG_BPF_STREAM_PARSER) += sock_map.o > > > obj-$(CONFIG_DST_CACHE) += dst_cache.o > > > obj-$(CONFIG_HWBM) += hwbm.o > > > -obj-$(CONFIG_NET_DEVLINK) += devlink.o > > > +obj-$(CONFIG_NET_DEVLINK) += devlink.o devlink_simple_fw_reporter.o > > > > This was looking super sexy up to here. This is networking specific. > > We want something generic for *anything* that requests firmware. > > You can't be serious. It's network specific because of how the Kconfig > is named? Wait, yeah, what? > Working for a company operating large data centers I would strongly > prefer if we didn't have ten different ways of reporting firmware > problems in the fleet. Agree. I don't actually operate anything, but still ... Thinking about this - maybe there's a way to still combine devcoredump and devlink somehow? Or (optionally) make devlink trigger devcoredump while userspace migrates? > > So networking may want to be aware that a firmware crash happened as > > part of this network device health thing, but firmware crashing is a > > generic thing. > > > > I have now extended my patch set to include uvents and I am more set on > > that we need the taint now more than ever. FWIW, I still completely disagree on that taint. You (Luis) obviously have been running into a bug in that driver, I doubt the firmware actually managed to wedge the hardware. But even if it did, that's still not really a kernel taint. The kernel itself isn't in any way affected by this. Yes, the system is in a weird state now. But that's *not* equivalent to "kernel tainted". > The irony is you have a problem with a networking device and all the > devices your initial set touched are networking. Two of the drivers > you touched either have or will soon have devlink health reporters > implemented. Like I said above, do you think it'd be feasible to make a devcoredump out of devlink health reports? And can the report be in a way that we control the file format, or are there limits? I guess I should read the code to find out, but I figure you probably just know. But feel free to tell me to read it :) The reason I'm asking is that it's starting to sound like we really ought to be implementing devlink, but we've got a bunch of infrastructure that uses the devcoredump, and it'll take time (significantly so) to change all that... johannes
