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soc:2009:pravin:journal:week6 [2009/07/04 06:06] less1 |
soc:2009:pravin:journal:week6 [2009/07/04 08:41] (current) less1 |
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| - It has taken unreasonably long time as fedora_11 lives cd was exceptionally slow on qemu for me, I couldn't get needed kernel modules from inside CD. | - It has taken unreasonably long time as fedora_11 lives cd was exceptionally slow on qemu for me, I couldn't get needed kernel modules from inside CD. | ||
| - I decided to migrate to kvm for better performance. but I was getting error ''could not open /dev/kvm: No such file or directory'' | - I decided to migrate to kvm for better performance. but I was getting error ''could not open /dev/kvm: No such file or directory'' | ||
| + | - After breaking my head around for some time, it seems my brand new laptop does not have support for virtualization :-( | ||
| + | - For time being, I am using virtual-box, it works fast enough, but only problem with virtualBox is, virtual machine does not pick up the IP address using DHCP as it happens with qemu '' -net user'' option. This means that my all gpxe scripts which do use dhcp by default will not work any more :-( | ||
| + | - I have not yet fixed this problem of dhcp support in virtualbox, I have postponed the solution finding for this problem for time being. | ||
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| - Now, actual work of understanding /init script and understanding how they use iso image as root starts. | - Now, actual work of understanding /init script and understanding how they use iso image as root starts. | ||
| - Done with modifications in /sbin/real-init which will (hopefully) mount the httpfs partition over root. | - Done with modifications in /sbin/real-init which will (hopefully) mount the httpfs partition over root. | ||
| + | - Initial runs were not very promising, when tried to boot this modified fedora live cd over BKO using qemu, it dropped me in rescue shell :!: | ||
| + | - There were few error messages in boot sequence | ||
| + | - ''mount: only root can do that'' | ||
| + | - ''getKernelCmdLine: failed to open /proc/cmdline: No such file or directory'' | ||
| + | - ''creating initial /dev : only root can do that'' | ||
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| + | ===== 3 July ===== | ||
| + | - Pin-pointed the cause | ||
| + | - when I tried command ''mount -t proc proc /proc'' It gave error saying ''mount: only root can do that'' | ||
| + | - But as this command is executed from within initrd, it is executed as root, so How can I get that error :?: | ||
| + | - With tip from AndyTim, it seemed that the initrd was created by non-root user, so even if those commands are executed by root, they don't have root privilages. | ||
| + | - It is strange in many ways, as initrd by non-root user works fine for ubuntu and other distributions I have tried. | ||
| + | - I suspect that selinux security policies are enforcing these extra rules as fedora is having selinux in enforcing mode. | ||
| + | - Anyways, creating initrd by root user does make sense in some ways. So, I will follow this for all distributions. | ||
| + | - The booting process has progressed, but now it is stuck at some other point. It just hangs without giving me rescue shell | ||
| + | - I don't even know if it has used httpfs, all my ''echo'' messages are lost in fast scrolling output of qemu, and I am not able to scroll back and see, what was happening. I need to find some way to be able to see previous outputs. of qemu. I miss that feature seriously in qemu. | ||
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| + | ===== 4 July ===== | ||
| + | - I will need one of the two things to be able to do debugging properly for problem in hand. | ||
| + | - Scrolling support for qemu (so that I can see old outputs and my debug messages ) | ||
| + | - dhcp support in virtual box (<del>I presume that it is having some kind of scrolling support</del> I tested and ''ALT+PG_UP'' does some scrolling up ) | ||
| + | - Started my day with trying to find how to scroll in qemu, but nothing promising came out. | ||
| + | - Both of above ways are time consuming, so I have resolved to use one odd method, taking screen-shots and then checking the old messages, only thing I can say about this method is that, it gets my job done. | ||
| + | - Now, coming back to the problem, I will log the progress with Red Hat [[Fedora11BKO|Here]] | ||
