Unable to mount the root fs on stable/8 r264339, GENERIC kernel, with MBR, FreeBSD slice, and UFS volume labels

[Trond Endrestøl]

On Fri, 11 Apr 2014 18:38+0200, Trond Endrestøl wrote:

> Hi,
> 
> I have a couple of uncritical systems running stable/8 r258344.
> Hardware is Dell OptiPlex GX260, BIOS A09, which is the latest rev.
> 
> The r264339 GENERIC kernel are unable to mount the root fs from the 
> hard drive using MBR, FreeBSD slice, and UFS volume labels.
> 
> r258344 obviously can.
> 
> I even tried regular device names like /dev/ad0s1a in /etc/fstab, and 
> at the mountroot> prompt, i.e. ufs:/dev/ad0s1a. The kernel still 
> cannot mount the root fs.
> 
> The new kernel (r264339) does recognize the ad0 harddrive, and ad0 is 
> listed as one of the GEOM managed disk devices; acd0 being the other 
> one.
> 
> Do I need to load additional geom modules, or is it a genuine bug?
> 
> I have recreated the same conditions on a spare GX260, yes, I have 
> plenty of them.

I believe I have identified r262226 as the offending commit.

Maybe the flags integer is set to a bad value before the calls to 
resource_list_alloc().

My spare system is currently recompiling r262221 of both world and 
kernel, and I hope to confirm this assumption in a few hours.

If all goes well, I intend to move forward to the latest revision of 
stable/8, back out the change done to sys/dev/pci/pci.c in r262226, 
recompile world and kernel, install the kernel, and if successfully, 
I'll install world as well.

> In addition there was some problems with the USB subsystem, so I 
> disabled USB in the BIOS for now. USB is not essential for any of my 
> systems.

I have reenabled the USB options in the BIOS, and I have attached a 
USB keyboard and a USB mouse, in addition to the PS/2 keyboard. All 
I/O devices work as they should. Maybe the USB issues were also caused 
by r262226.

Stay tuned.

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