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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Xen 4.0 Custom kernels
On Mon, May 17, 2010 at 12:31:32PM -0300, Net Warrior wrote: > Well.. I'm having the same error > Setting up new root fs > setuproot: moving /dev failed: No such file or directory > no fstab.sys, mounting internal defaults > setuproot: error mounting /proc: No such file or directory > setuproot: error mounting /sys: No such file or directory > Switching to new root and running init. > unmounting old /dev > unmounting old /proc > unmounting old /sys > switchroot: mount failed: No such file or directory > Kernel panic - not syncing: Attempted to kill init! > Pid: 1, comm: init Not tainted 2.6.31.13 #16 > Call Trace: > [<c105beb6>] panic+0x46/0x100 > [<c105e856>] do_exit+0x626/0x6d0 > [<c105e931>] do_group_exit+0x31/0x90 > [<c105e99f>] sys_exit_group+0xf/0x20 > [<c102a069>] syscall_call+0x7/0xb > ---- > CONFIG_XEN_NETDEV_FRONTEND=m > CONFIG_XEN_BLKDEV_FRONTEND=m Ok, so it's a module. > config file > disk = [ 'phy:VG-NW/root,xvda1,w','phy:VG-NW/swap,xvda2,w' ] > root = "/dev/xvda1 ro" > fstab for DomU > /dev/xvda1 / ext3 defaults 1 1 > tmpfs /dev/shm tmpfs defaults 0 0 > none /dev/pts devpts gid=5,mode=620 0 0 > #devpts /dev/pts devpts gid=5,mode=620 0 0 > sysfs /sys sysfs defaults 0 0 > proc /proc proc defaults 0 0 > /dev/xvda2 swap swap defaults 0 0 > Those look OK. > Do not know what's missing, I'll keep trying. > Thanks for your time and support. > You need to have an initrd image for the guest kernel. The initrd needs to include xen-blkfront.ko driver module, and the initrd init script needs to load it. Then your guest is able access the root filesystem. -- Pasi > Best Regards > 2010/5/17 Net Warrior <[1]netwarrior863@xxxxxxxxx> > > Hi There. > Thank you very much for your assistance, I'll try to compile it as > module and give it a try , for sure I know is compiled embeded. > Will report as soon as I get some results. > Best Regards > 2010/5/17 Pasi Kärkkäinen <[2]pasik@xxxxxx> > > On Mon, May 17, 2010 at 12:29:59AM -0300, Net Warrior wrote: > > Hi There. > > Sorry for the delay, here is the config file for DomU , Only the > options I > > modified, the rest is as it is, by default. > > # Kernel image file. > > kernel = "/boot/vmlinuz-2.6.31.13" > > > > # Optional ramdisk. > > ramdisk = "/boot/initrd-2.6.31.13.img" > > > > memory = 64 > > > > # A name for your domain. All domains must have different names. > > name = "Netwarrior" > > > > vif = [ '' ] > > disk = [ 'phy:VG-NW/root,sda1,w','phy:VG-NW/swap,sda2,w' ] > > # Set root device. > > root = "/dev/sda1 ro" > > > > Wrong. You should be using xvda1 and xvda2 instead of sda1 and sda2. > pvops kernels only support xvd* disk names in the guest. > > # Sets runlevel 4. > > extra = "4" > > How do I know which hardware Xen ( Dom0 ) is providing to the > DomU ? > > > > Also check the 2.6.31.13 kernel .config if xen-blkfront is built-in or > compiled as a module. > If it's compiled as a module then you need to have an initrd that > actually loads it! > > -- Pasi > > Thank you very much. > > Regards > > 2010/5/14 Pasi Kärkkäinen <[1][3]pasik@xxxxxx> > > > > On Fri, May 14, 2010 at 07:47:33AM -0300, Net Warrior wrote: > > > Hi There. > > > The hardware is the same, so I asume that the initramfs > used for > > Dom0 > > > could be used for DomU as well > > > > > > > No, the hardware is not the same! > > > > domU only has "virtual" hardware provided by Xen, which is > totally > > different > > from the physical hardware dom0 has access to! > > > > , and yes I specified the root partition in > > > the DomU config file as well something like root /dev/sda1 > ro , > > should I > > > use xdev as well in there? > > > Thanks for your time and support. > > > > > > > Please paste your /etc/xen/<guest> cfgfile. > > > > -- Pasi > > > > > Best Regards > > > 2010/5/14 Pasi Kärkkäinen <[1][2][4]pasik@xxxxxx> > > > > > > On Thu, May 13, 2010 at 07:40:51PM -0300, Net Warrior > wrote: > > > > Hi there guys > > > > > > > > As a test, I started using the same kernel and > initramfs like > > in Dom0 > > > > which i know it works, but when starting up DomU I've > get. > > > > > > > > switchroot: mount failed: No such file or directory > > > > Kernel panic - not syncing: Attempted to kill init! > > > > Pid: 1, comm: init Not tainted 2.6.31.13 #14 > > > > > > > > > > So the dom0 initrd image is not suitable for domU, ie. > it doesn't > > load > > > xen block frontend driver.. most probably. So the domU > kernel is > > > not able to access the virtual disks provided to it. > > > > I've got the same error while setting up Dom0 and was > a problem > > with > > > > the scsi modules which I included in the kernel and > not in the > > > > initramfs, my bad !! > > > > > > > > My config file looks this. > > > > > > > > > > > #---------------------------------------------------------------------------- > > > > # Kernel image file. > > > > kernel = "/boot/vmlinuz-2.6.31.13" > > > > > > > > # Optional ramdisk. > > > > ramdisk = "/boot/initrd-2.6.31.13.img" > > > > > > > > disk = [ > 'phy:VG-NW/root,sda1,w','phy:VG-NW/swap,sda2,w' ] > > > > > > > > > > You should use xvda1 and xvda2 here, not sda1 and sda2. > > > the sd* naming is deprecated for xen PV guests. > > > > Also copied the /lib/modules/kernel_version to the > *guest* > > partition. > > > > > > > > What am I missing? > > > > > > > > > > You need to create an initrd image that is suitable for > the domU. > > > > > > Also did you specify root= parameter for the domU > kernel? > > > -- Pasi > > > > > > > Thanks for your time and support > > > > Regards > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > 2010/5/13, Pasi Kärkkäinen <[2][3][5]pasik@xxxxxx>: > > > > > On Thu, May 13, 2010 at 02:38:40PM -0300, Net > Warrior wrote: > > > > >> Hi Pasi. > > > > >> > > > > >> Did not know I could use the Vanila Kernel for DomU > usage, I > > > thought > > > > >> it has to be patched somehow as well.. so good > news, I'll > > try to > > > > >> compile a custom one using the latest stable from > > [3][4][6]kernel.org and > > > leave > > > > >> the Dom0 which is working as it is. > > > > >> > > > > > > > > > > I recommend using the latest stable 2.6.32.x kernel > for the > > domU. > > > > > > > > > > If you're building a 32bit domU kernel remember it > needs to > > be PAE > > > (64G mem > > > > > support), > > > > > otherwise you won't see the pvops Xen domU options > at all in > > the > > > kernel > > > > > configuration. > > > > > > > > > > There are no special requirements for 64bit domU > kernel. > > > > > > > > > > -- Pasi > > > > > > > > > >> Thanks for your time and support > > > > >> Regards > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> 2010/5/13, Pasi Kärkkäinen <[4][5][7]pasik@xxxxxx>: > > > > >> > On Thu, May 13, 2010 at 12:38:00PM -0300, Net > Warrior > > wrote: > > > > >> >> Hi there guys. > > > > >> >> > > > > >> >> I'm using CentOS 5.4, I was able to compile > my custom > > Dom0 > > > kernel > > > > >> >> and > > > > >> >> boot > > > > >> >> it, now I've got some doubts. > > > > >> >> > > > > >> >> I'd like to compile a custom DomU image, the > problem > > is that > > > when I > > > > >> >> do, > > > > >> >> make kernels KERNELS="linux-2.6-xen0 > linux-2.6-xenU" > > it tries > > > to > > > > >> >> download > > > > >> >> the kernel > > > > >> >> from the HG repository which seems to have > old 2.6.18 > > > kernels, I > > > > >> >> want > > > > >> >> to > > > > >> >> use the GIT repository which is alrealdy > downloaded > > and is > > > the > > > > >> >> source I > > > > >> >> used to complile Dom0 using > > > > >> >> kernel 2.6.33.13. > > > > >> >> > > > > >> > > > > > >> > specifying KERNELS="linux-2.6-xen0 > linux-2.6-xenU" will > > compile > > > > >> > linux-2.6.18-xen, > > > > >> > that's how it should be. > > > > >> > > > > > >> > If you don't specify KERNELS= at all, then it'll > build > > > linux-2.6.31.x > > > > >> > kernel. > > > > >> > Or alternatively you can specify > KERNELS="linux-2.6-pvops" > > to get > > > the > > > > >> > same > > > > >> > result. > > > > >> > > > > > >> >> Question: > > > > >> >> Which files do I have to modify or how do I > have to > > proceed > > > to > > > > >> >> achieve > > > > >> >> what I want? > > > > >> >> > > > > >> > > > > > >> > Did you know you can use the *default* (vanilla) > > [5][6][8]kernel.org > > > Linux > > > > >> > kernels as > > > > >> > Xen PV domU? > > > > >> > No patches needed for that, the upstream kernels > will work > > for > > > domU. > > > > >> > > > > > >> >> Under /usr/src/xen-4.0.0/buildconfigs I can > see some > > files > > > which > > > > >> >> define > > > > >> >> some stuff depending on what I chose but not > sure if > > it's > > > safe to > > > > >> >> mees > > > > >> >> with this. > > > > >> >> > > > > >> >> Thanks for your time and support. > > > > >> > > > > > >> > Hopefully that helps. > > > > >> > > > > > >> > -- Pasi > > > > >> > > > > > >> > > > > > > > > > > > > References > > > > > > Visible links > > > 1. mailto:[7][9]pasik@xxxxxx > > > 2. mailto:[8][10]pasik@xxxxxx > > > 3. [9][11]http://kernel.org/ > > > 4. mailto:[10][12]pasik@xxxxxx > > > 5. [11][13]http://kernel.org/ > > > > References > > > > Visible links > > 1. mailto:[14]pasik@xxxxxx > > 2. mailto:[15]pasik@xxxxxx > > 3. mailto:[16]pasik@xxxxxx > > 4. [17]http://kernel.org/ > > 5. mailto:[18]pasik@xxxxxx > > 6. [19]http://kernel.org/ > > 7. mailto:[20]pasik@xxxxxx > > 8. mailto:[21]pasik@xxxxxx > > 9. [22]http://kernel.org/ > > 10. mailto:[23]pasik@xxxxxx > > 11. [24]http://kernel.org/ > > References > > Visible links > 1. mailto:netwarrior863@xxxxxxxxx > 2. mailto:pasik@xxxxxx > 3. mailto:pasik@xxxxxx > 4. mailto:pasik@xxxxxx > 5. mailto:pasik@xxxxxx > 6. http://kernel.org/ > 7. mailto:pasik@xxxxxx > 8. http://kernel.org/ > 9. mailto:pasik@xxxxxx > 10. mailto:pasik@xxxxxx > 11. http://kernel.org/ > 12. mailto:pasik@xxxxxx > 13. http://kernel.org/ > 14. mailto:pasik@xxxxxx > 15. mailto:pasik@xxxxxx > 16. mailto:pasik@xxxxxx > 17. http://kernel.org/ > 18. mailto:pasik@xxxxxx > 19. http://kernel.org/ > 20. mailto:pasik@xxxxxx > 21. mailto:pasik@xxxxxx > 22. http://kernel.org/ > 23. mailto:pasik@xxxxxx > 24. http://kernel.org/ _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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