Date: Sat, 23 Aug 2008 10:56:17 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Christian Weisgerber <naddy@mips.inka.de> Subject: Re: No root filesystem Message-ID: <200808231056.18305.jhb@freebsd.org> In-Reply-To: <g8p73s$232$1@lorvorc.mips.inka.de> References: <g8nl1b$279$1@lorvorc.mips.inka.de> <g8p73s$232$1@lorvorc.mips.inka.de>
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On Saturday 23 August 2008 10:33:32 am Christian Weisgerber wrote: > Christian Weisgerber <naddy@mips.inka.de> wrote: > > I just tried to update my box, but the new kernel wouldn't find a > > root device. This is a rather vanilla amd64 box, no zfs, one SATA > > disk, no other operating systems. > > > > It tried to mount ufs:/dev/ad6s1a, which is correct, but somehow > > came up empty. At the "Manual root filesystem specification" prompt, > > "?" did not list any devices. > > > > My previous good kernel is about 48 hours old, so this must have > > been introduced very recently. > > I've compared dmesgs and these lines are missing when I boot the bad > kernel: > > k8temp0: <AMD K8 Thermal Sensors> on hostb3 > > acd0: DVDR <ASUS DRW-2014L1T/1.00> at ata2-master SATA150 > ad6: 143089MB <WDC WD1500ADFD-00NLR5 21.07QR5> at ata3-master SATA150 > > The drives aren't found, so not root filesystem. > > It turns out that the problem is caused by this commit: > > SVN rev 181987 on 2008-08-22 02:14:23Z by jhb > Extend the support for PCI-e memory mapped configuration space access: > > Reverting this fixed the problem. The drives are found again (and > so are the thermal sensors). > > The machine is based on an nForce 570 SLI MCP chipset (Asus M2N-SLI > Deluxe). Here's the dmesg, minus the witness chatter on root mount: Does 'acpidump -t' show a MCFG table? Also, can you get the output of 'devinfo -r' (with working kernel). -- John Baldwin
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