Re: [PATCH v2 1/3] genirq/affinity: Add irq_update_affinity_desc()

[John Garry]

Hi Marc,

> I did:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=irq/hacks 

ok, I'll have a look

> > You still should be able to enable my favorite
> > CONFIG_DEBUG_TEST_DRIVER_REMOVE=y, while the distro still boot. But
> > I'll just test if you want.
>
> Ah! Let me try that then. Having been debugging some ugly driver removal
> lately, I wish I had known that config option and inflicted it on their
> authors...

Just in case - be careful with this one! It kills the boot of many 
systems, but D05 should be fine.

> [...]
>
> > > And while the mbigen port that is connected to the SAS controller
> > > doesn't seem to be shared between endpoints, some other ports definitely
> > > are:
> > >
> > > # cat /sys/kernel/debug/irq/domains/\\_SB.MBI1
> > > name:   \_SB.MBI1
> > >   size:   409
> > >   mapped: 192
> > >   flags:  0x00000003
> > >
> > > [...]
> > >
> > > I guess that the other 217 lines are connected somewhere.
> >
> > I think that is not the right one. See
> > https://github.com/tianocore/edk2-platforms/blob/master/Silicon/Hisilicon/Hi1616/D05AcpiTables/Dsdt/D05Sas.asl#L101 
>
> I know, I was just outlining the fact that some of the mbigen
> ports are shared between devices, and MBI1 seems to be an example
> of that (though my reading of ASL is... primitive).

Ah, ok. So this one is for the networking subsystem, and it does have 
many devices in the topology model, but I can't claim to known much more 
than that.

Thanks,
John