Re: USB storage no-boot regression (bisected)

[Mark Lord]

Alan Stern wrote:
> On Wed, 15 Apr 2009, Alan Cox wrote:
>
> > Why should every user suffer a slower boot and a poorer resume time ?
> >
> > Instead make the root fs mounting look like this
> >
> >
> > 	while(my_rootfs_hasnt_appeared_and_i_am_sad()) {
> > 		wait_on(&new_disk_discovery);
> > 	}
> >
> > and poke the queue whenever we add a relevant device.
> >
> > That way if you are booting off an initrd you can finish the SATA probe
> > in parallel to getting userspace ticking over.
> >
> > On what is nowdays essentially a hot plug system it all needs turning
> > this way up - eg RAID volumes should assemble and come online as the
> > drives are discovered not at some fixed point later in userspace.
>
> Indeed, something like this should also be used for 
> resume-from-hibernation, to wait for the swap device.
..

It just needs a way to set a finite timeout, so that server room
equipment can auto-panic-reboot and try again if a device has died.

-ml
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