On Saturday 27 November 2010 15:17:43 Mark Knecht wrote: > On Sat, Nov 27, 2010 at 6:59 AM, Mick <michaelkintz...@gmail.com> wrote: > > I haven't had much luck with the 2.6.35 version of kernels - they have > > cause panics on two different x86 boxen. > > > > Now that 2.6.35 has gone stable so I tried it again and I'm getting a > > kernel panic complaining about VFS unable to mount root fs: > > ================================== > > VFS: Cannot open root device "sda3" or unknown-block(0,0) > > Please append a correct "root=" boot option; here are the available > > partitions: Kernel panic - not syncing: VFS: Unable to mount root fs on > > unknown-block(0,0) Pid: 1, comm: swapper Not tainted 2.6.35-gentoo-r12 > > #2 > > Call Trace: > > [<c14b3530>] ? panic+0x5f/0xc6 > > [<c1693c68>] ? mount_block_root+0x1c2/0x245 > > [<c1002930>] ? do_signal+0x766/0x7f2 > > [<c1693d31>] ? mount_root+0x46/0x5a > > [<c1693e8b>] ? prepare_namespace+0x146/0x182 > > [<c1093203>] ? sys_access+0x1f/0x23 > > [<c16933f1>] ? kernel_init+0x1a9/0x1b7 > > [<c1693248>] ? kernel_init+0x0/0x1b7 > > [<c10030b6>] ? kernel_thread_helper+0x6/0x10 > > panic occurred, switching back to text console > > ================================== > > <SNIP> > > > Am I missing something obvious to make the 2.6.35 series work with my > > boxen?
> OK, there's so many possibilities for what causes this. Basic > confusion ensues... > > 1) When booting, if you look carefully, is the initial kernel seeing > _any_ disks? Sometimes they fly bye and are hard to catch. If it is > then is it showing sda3? The moment the monitor comes on it's already crashed - the first line under the penguins shows: Initializing USB Mass Storage driver... so I assume that any probing of drives has already happened. > 2) What sort of file system did you put on sda3? I assume this is > built into the kernel if this is an upgrade? reiserfs built into the kernel and unchanged for the last umpteen kernel series. > 3) Post the appropriate part of grub.conf to show how you are booting. title=Gentoo Linux 2.6.35-r12 root (hd0,5) kernel /kernel-2.6.35-gentoo-r12 root=/dev/sda3 The 2.6.34-r12 uses the same stanza except for *.35 being replaced with *.34 > 4) Post fstab /dev/sda6 /boot ext2 noauto,noatime 1 1 /dev/sda3 / reiserfs noatime 0 1 /dev/sda2 none swap sw 0 0 [snip] I'll now build the kernel on the second x86 box and see what happens there. -- Regards, Mick
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