Can we please make forward progress on this?
Christoph, Sagi: it seems you think /proc/irq/$IRP/smp_affinity
shouldn't be allowed if drivers support managed affinity. Is that
correct?
Perhaps that can be codified and be a way forward? IE: Somehow allow
the admin to choose either "managed by the driver/ulps" or "managed by
the system admin directly"?
Or just use Sagi's patch. Perhaps a WARN_ONCE() if the affinity looks
wonked when set via procfs? Just thinking out loud...
I think we should take my patch. While ideally we'd like to have
perfect linear irq based queue mapping, people apparently really like
to modify devices irq affinity. With this, at least some of the queues
are assigned according to the device affinity. Its not ideal, but at
least better than blindly falling to default mapping.
Christoph?
If there is strong resistance to the patch we should at least start
by falling to the default mapping unconditionally.
Ping?
Would you prefer we fallback to the naive mapping if the device is not
using manged affinity?
