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

[Steven Cole]

Matt Mackall wrote:
> On Wed, Feb 23, 2005 at 03:10:38PM -0700, Steven Cole wrote:
>
> > Andrew Morton wrote:
> >
> > > Steven Cole <elenstev@xxxxxxxxxxx> 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;

Andrew's above patch fixes the hdb->hdq insanity, but I still need
CONFIG_BASE_FULL=y.  I tried unsetting CONFIG_BASE_FULL, and again
got the "VFS: Cannot open root device" message (with akpm's patch).

Steven

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