Shouldn't we rather modify the tagset to only refer to the current online
CPUs _only_, thereby never submit a connect request for hctx with only
offline CPUs?
Then you may setup very less io queues, and performance may suffer even
though lots of CPUs become online later.
;
Only if we stay with the reduced number of I/O queues. Which is not what I'm
proposing; I'd rather prefer to connect and disconnect queues from the cpu
hotplug handler. For starters we could even trigger a reset once the first
cpu within a hctx is onlined.
Yeah, that need one big/complicated patchset, but not see any advantages
over this simple approach.
I tend to agree with Ming here.
