The pvops kernel has some trouble finding my root:
grub'2'.cfg:
menuentry "GNU/Linux, with Linux 2.6.31.13" --class gnu-linux --class
gnu --class os {
set gfxpayload=keep
insmod raid
insmod mdraid
insmod ext2
set root='(md0)'
search --no-floppy --fs-uuid --set
5d272f28-2087-490b-8de2-c7d12beaff69
echo Loading Linux 2.6.31.13 ...
linux /vmlinuz-2.6.31.13 root=/dev/md2 ro console=tty0
console=ttyS0,38400,8n1
}
...
menuentry "Xen 4.0.0. linux-2.6.31.13 pvops" {
insmod raid
insmod mdraid
insmod ext2
set root='(md0)'
search --no-floppy --fs-uuid --set
5d272f28-2087-490b-8de2-c7d12beaff69
echo Loading Linux 2.6.33 ...
multiboot /xen-4.0.1-rc1-pre.gz dom0_mem=512M loglvl=all
guest_loglvl=all com1=38400,8n1,0x3f8,4 console=com1 iommu=0
module /vmlinuz-2.6.31.13 root=/dev/md2 ro console=hvc0
earlyprintk=xen nomodeset
}
pvops kernel by itself:
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 2.6.31.13 (hans@bootes) (gcc version 4.4.3
(GCC) ) #3 SMP Sat May 22 13:46:23 CEST 2010
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-2.6.31.13 root=/dev/md2
ro console=tty0 console=ttyS0,38400,8n1
....
[ 8.177481] VFS: Mounted root (ext4 filesystem) readonly on device 9:2.
[ 8.197548] Freeing unused kernel memory: 508k freed
[ 8.212901] Write protecting the kernel read-only data: 8016k
[ 8.283642] Warning: unable to open an initial console.
[ 11.637889] scsi 2:0:0:0: Direct-Access USB DISK 2.0
PMAP PQ: 0 ANSI: 0 CCS
[ 11.664631] sd 2:0:0:0: Attached scsi generic sg2 type 0
[ 11.681100] sd 2:0:0:0: [sdc] 15882240 512-byte logical blocks: (8.13
GB/7.57 GiB)
[ 11.705456] sd 2:0:0:0: [sdc] Write Protect is off
[ 11.719981] sd 2:0:0:0: [sdc] Assuming drive cache: write through
[ 11.741948] sd 2:0:0:0: [sdc] Assuming drive cache: write through
[ 11.760338] sdc: sdc1
[ 11.770449] sd 2:0:0:0: [sdc] Assuming drive cache: write through
[ 11.788846] sd 2:0:0:0: [sdc] Attached SCSI removable disk
[ 13.131600] md: stopping all md devices.
[ 13.143484] md: md1 switched to read-only mode.
[ 13.157185] md: md2 switched to read-only mode.
[ 13.170878] md: md0 switched to read-only mode.
[ 14.675056] sd 0:0:1:0: [sdb] Synchronizing SCSI cache
[ 14.690799] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 14.755088] e1000 0000:04:07.0: PCI INT A disabled
[ 14.769676] e1000 0000:04:06.0: PCI INT A disabled
[ 14.784256] e1000 0000:04:04.0: PCI INT A disabled
[ 14.799257] Restarting system.
[ 14.808522] machine restart
So there is a mounted rootfs on /dev/md2 but apparently no console.
pvops on top of xen:
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 2.6.31.13 (hans@bootes) (gcc version 4.4.3
(GCC) ) #3 SMP Sat May 22 13:46:23 CEST 2010
[ 0.000000] Command line: ro console=hvc0 earlyprintk=xen nomodeset
here root=/dev/md2 has disappeared!
...
[ 3.289417] md: ... autorun DONE.
[ 3.289830] VFS: Cannot open root device "<NULL>" or unknown-block(0,0)
[ 3.289856] Please append a correct "root=" boot option; here are the
available partitions:
[ 3.289903] 0800 488386584 sda driver: sd
[ 3.289935] 0801 72261 sda1
[ 3.289962] 0802 530145 sda2
[ 3.289989] 0803 530145 sda3
[ 3.290021] 0804 487251450 sda4
[ 3.290048] 0810 488386584 sdb driver: sd
[ 3.290077] 0811 72261 sdb1
[ 3.290084] 0812 530145 sdb2
[ 3.290084] 0813 530145 sdb3
[ 3.290084] 0814 487251450 sdb4
[ 3.290084] 0900 72192 md0 (driver?)
[ 3.290084] 0902 530048 md2 (driver?)
[ 3.290084] 0901 530048 md1 (driver?)
[ 3.290084] Kernel panic - not syncing: VFS: Unable to mount root fs
on unknown-block(0,0)
[ 3.290084] Pid: 1, comm: swapper Not tainted 2.6.31.13 #3
[ 3.290084] Call Trace:
[ 3.290084] [<ffffffff81544197>] panic+0x75/0x130
[ 3.290084] [<ffffffff818daa67>] mount_block_root+0x257/0x26e
[ 3.290084] [<ffffffff818daad4>] mount_root+0x56/0x5a
[ 3.290084] [<ffffffff818dac48>] prepare_namespace+0x170/0x19d
[ 3.290084] [<ffffffff818d9f40>] kernel_init+0x1b5/0x1c5
[ 3.290084] [<ffffffff81014daa>] child_rip+0xa/0x20
[ 3.290084] [<ffffffff81013f67>] ? int_ret_from_sys_call+0x7/0x1b
[ 3.290084] [<ffffffff8101471d>] ? retint_restore_args+0x5/0x6
[ 3.290084] [<ffffffff81014da0>] ? child_rip+0x0/0x20
which ends in a disaster.
I have got to questions. In case of the pvops only boot is the an error
in the grub.cfg file do I need to change the console? In case of the
xen-pvops boot where has the root=/dev/md2 gone?
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