Messages in this thread Patch in this message | | | Date | Mon, 3 Jun 2002 17:05:52 +0200 | From | Eric Lammerts <> | Subject | Re: patch to have root fs on USB device (please CC) |
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On Sun, Jun 02, 2002 at 10:13:22PM +0200, Paul Stoeber wrote: > It simply sleeps 10 seconds before mount_block_root(). > > I get an 'Unable to mount root' panic if I don't apply it, > because the attached device rolls in too late.
A while ago I made the patch below. I retries every second until the root device appears. Advantages: - no delay when the device is already there - it also works if it takes longer than 10s to find the harddisk (for example, if you plug it in later)
I don't know if it applies cleanly to current kernels.
Eric
--- 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); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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