On Wed, May 09, 2007 at 03:38:13PM +0200, Cornelia Huck wrote:
> On Wed, 9 May 2007 02:53:02 -0700,
> Greg KH <[email protected]> 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.
Why is it dead? Since when is PCI the only bus in the system?
> > 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.
PCI probing is just reading stuff from memory. The slowness happens
when storage devices need to spin up and/or discover attached drives.
So, the async stuff can be done in those buses if wanted/needed, PCI is
not the problem here.
thanks,
greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
