Re: 2.6.11-rc4-mm1 (VFS: Cannot open root device "301")

Matt Mackall
2005-02-24T00:53:35Z

On Wed, Feb 23, 2005 at 03:10:38PM -0700, Steven Cole wrote:
> Andrew Morton wrote:
> >Steven Cole <elenstev@mesatop.com> wrote:
>
> >>I am having trouble getting recent -mm kernels to boot on my test box.
> >>For 2.6.11-rc3-mm2 and 2.6.11-rc4-mm1 I get the following:
> >>
> >>VFS: Cannot open root device "301" or unknown-block(3,1)
> >>Please append a correct "root=" boot option
> >>Kernel panic - not syncing: VFS: Unable to mount root fs on
> >>unknown-block(3,1)
> >>
> [snipped]
> >
> >Please set CONFIG_BASE_FULL=y. Check that this causes CONFIG_BASE_SMALL=0,
> >then retest.
>
> Yes, that worked. 2.6.11-rc4-mm1 now boots OK, but hdb1 seems to be
> missing.

Can you retry CONFIG_BASE_FULL=n with Andrew's patch?

You may need to boot back into a sane kernel for LILO to operate properly.

--- 25/drivers/ide/ide-probe.c~ide_init_disk-fix Wed Feb 23 16:24:44 2005
+++ 25-akpm/drivers/ide/ide-probe.c Wed Feb 23 16:24:55 2005
@@ -1269,7 +1269,7 @@ EXPORT_SYMBOL_GPL(ide_unregister_region)
void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
- unsigned int unit = drive->select.all & (1 << 4);
+ unsigned int unit = (drive->select.all >> 4) & 1;

disk->major = hwif->major;
disk->first_minor = unit << PARTN_BITS;

--
Mathematics is the supreme nostalgia of our time.