Re: rootfs on USB storage device

[Pete Zaitcev]

> Date: Fri, 16 Nov 2001 14:21:04 +0100 (CET)
> From: Eric Lammerts <[e-mail]>
> To: Pete Zaitcev <[e-mail]>
> cc: [e-mail], Greg KH <[e-mail]>,
>    <[e-mail]>

> > I think khubd needs to run to complete whole process and mdelay()
> > locks it out. You need something that calls schedule() for USB
> > detection to work. Try to use schedule_timeout() instead of mdelay().
> 
> This patch works for me.

Looks like a well done patch but what does happen if root= was
indeed incorrect? I wish there was a way to print something
meaningful for the operator.

-- Pete

P.S. - quoting the patch, saved for future reference
> --- linux-2.4.14-pre8-ext3/fs/super.c.orig	Fri Nov 16 00:59:18 2001
> +++ linux-2.4.14-pre8-ext3/fs/super.c	Fri Nov 16 01:07:26 2001
> @@ -1009,11 +1009,13 @@
>  		 * Allow the user to distinguish between failed open
>  		 * and bad superblock on root device.
>  		 */
> -		printk ("VFS: Cannot open root device \"%s\" or %s\n",
> +		printk ("VFS: Cannot open root device \"%s\" or %s, retrying in 1s.\n",
>  			root_device_name, kdevname (ROOT_DEV));
> -		printk ("Please append a correct \"root=\" boot option\n");
> -		panic("VFS: Unable to mount root fs on %s",
> -			kdevname(ROOT_DEV));
> +
> +		/* wait 1 second and try again */
> +		current->state = TASK_INTERRUPTIBLE;
> +		schedule_timeout(HZ);
> +		goto retry;
>  	}
> 
>  	check_disk_change(ROOT_DEV);