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| 18:43.31 | bobboucher | Hi. Is there anyone familiar with initramfs? |
| 18:47.28 | mnemoc | ask the real question, and wait..... patiently |
| 18:55.50 | bobboucher | I have an ARM board on which I want to boot load a kernel + file system from NAND flash, but execute everything in RAM. |
| 18:56.23 | bobboucher | I successfully booted a gziped ext2 file system image (with root=/dev/ram0) |
| 18:56.36 | bobboucher | However I think using initramfs would be more efficient. |
| 18:59.13 | bobboucher | I can boot with initramfs but it just fails and drop to a shell without populating /dev and starting services. |
| 19:00.05 | mnemoc | populating /dev is demode. just use devtmpfs |
| 19:02.19 | bobboucher | ok I will look into that, however, how do I continue the boot sequence? I can't exec /sbin/init that fails too. |
| 19:05.50 | bobboucher | Basically I want my system to run exactly as the ext2 ram drive, except with no ext2 or root=/dev/ram0 involved. I understand I need a /init script, but what do I put in that script? Would a single exec /sbin/init line work? |
| 19:06.43 | mnemoc | look at switchroot |
| 19:07.20 | bobboucher | yeah but I don't want to switch root. I have everything I need in my rootfs. |
| 19:08.14 | mnemoc | yes, making /init exec /sbin/init is common too |
| 19:09.39 | bobboucher | can I really run switch_root with current root as new root? |
| 19:11.54 | mnemoc | no |
| 19:12.04 | mnemoc | i didn't read you carefully |
| 19:12.59 | mnemoc | switch_root check that every mouse has been moved away, destroys /, and chroots |
| 19:13.05 | mnemoc | s/mouse/mount/ |
| 19:17.54 | bobboucher | let say I have /dev, /sys and /proc mounted. How do I continue booting (start services, bring up network interfaces, etc.) |
| 19:21.46 | mnemoc | exec /sbin/init should do that |
| 19:22.03 | mnemoc | assuming /sbin/init is a real init |
| 19:22.41 | bobboucher | I tried it and it says process ID must be 1 |
| 19:23.28 | stefan877 | hi, there is a howto for linux and gdb debugging: http://elinux.org/Debugging_The_Linux_Kernel_Using_Gdb |
| 19:23.56 | stefan877 | is it possible to load an uImage instead of vmlinux? |
| 19:24.11 | stefan877 | because vmlinux load needs 10 minutes over jtag |
| 19:24.27 | stefan877 | uImage load over tftp needs only 20 seconds. |
| 19:25.05 | stefan877 | and when debugging with jtag, the registers are not setted (machine number, command line, ...) |
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| 20:42.00 | *** topic/#elinux is http://eLinux.org/ || Ask anything; it may take 24+ hours to get a response. Mailing lists -> http://elinux.org/ELinuxWiki:Mailing_List |
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