Messages in this thread |  | | | Date | Fri, 25 Apr 2008 09:30:52 +0300 (EEST) | | From | Pekka J Enberg <> | | Subject | Re: [RFC/PATCH] usb-storage: wait for device scanning before mounting root |
On Thu, 24 Apr 2008, Matthew Dharm wrote:
> This also has all sorts of races between do_mounts 'waiting' and the actual
> USB device enumeration. It's entirely possible that the kernel loads via
> BIOS, the USB drivers are loaded, that forces devices to disconnect/reset,
> and they take a while to re-enumerate. During that delay, the kernel gets
> to do_mount; now, no devices show in this "waiting for scan" count.
So how does that happen? ->storage_probe fails and driver core calls it
later at some point?
On Thu, 24 Apr 2008, Matthew Dharm wrote:
> The right way to do this is via initrd and something like devlabel to wait
> for a specific device to appear. On some systems, you may want to wait for
> several devices to appear.
You should be able to boot from an external USB disk without initrd.
That's why we have the current root_delay= hack.
Pekka
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