Re: Please revert 5adc55da4a7758021bcc374904b0f8b076508a11(PCI_MULTITHREAD_PROBE)

[Cornelia Huck]

On Wed, 9 May 2007 02:53:02 -0700,
Greg KH <greg@xxxxxxxxx> wrote:

> > 2. Sheer volume of devices on a bus. Even if the indivdual probing
> > doesn't take long, having all devices probed one after the other may
> > take a lot of time. Putting the actual probe on a thread makes it
> > possible to run several probes in parallel, thereby cutting probing
> > time.
> 
> Again, not for PCI, right?

It seems that everyone agrees now that moving PCI over to a new probing
model without individual driver support was a bad idea. So generic
multithreaded probing is dead.

> If you want to implement this for your bus type, fine, I have no
> objection to that at all, but not for PCI, it's just not worth it.

Infrastructure for async probing might not be such a bad idea, though.
(Aren't there some huge PCI-based machines?) However, I don't really
care whether PCI or SCSI or $HUGE_BUS use it, but serial synchronous
probing on a bus looks like a killer on most large systems.
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