Messages in this thread Patch in this message | | | From | Chris Lingard <> | Subject | 2.4.22 init/do_mounts.c Bug when booting a devfs CD | Date | Thu, 9 Oct 2003 11:51:37 +0100 |
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Hope I have the right person; you may be interested in this.
I boot a CD using initrd; the RAMDISK uses devfs within the linuxrc script to pivot_root/chroot as in the documentation. In the documentation it is suggested that root=/dev/rd/0 is used, if using devfs.
A boot using root=/dev/ram0 works fine, root=/dev/rd/0 shows a bug in init/do_mounts.c, in void prepare_namespace(void)
The test: if (initrd_load() && ROOT_DEV != MKDEV(RAMDISK_MAJOR, 0)) is true, and handle_initrd() is wrongly called. This is a bug, (I assume that this code is to relinquish the original boot). The call that is used is at the end of main.c where linuxrc is called instead of /sbin/init.
This is because rd/0 is not in root_dev_names; a patch is attached to fix this.
Strangly enough, it still boots, despite linuxrc being called twice :-)
An alternative would be to change the documentation of initrd, so that only root=/dev/ram0 is mentioned, despite using devfs.
Chris Lingard diff -Naur linux-2.4.22.old/init/do_mounts.c linux-2.4.22/init/do_mounts.c --- linux-2.4.22.old/init/do_mounts.c 2003-09-10 12:18:55.000000000 +0100 +++ linux-2.4.22/init/do_mounts.c 2003-09-23 12:46:36.000000000 +0100 @@ -227,6 +227,11 @@ { "ataraid/d13p",0x72D0 }, { "ataraid/d14p",0x72E0 }, { "ataraid/d15p",0x72F0 }, +#ifdef CONFIG_BLK_DEV_RAM +#ifdef CONFIG_BLK_DEV_INITRD + { "rd/0", 0x0100 }, +#endif +#endif { "rd/c0d0p",0x3000 }, { "rd/c0d0p1",0x3001 }, { "rd/c0d0p2",0x3002 }, | |