? 2013?04?07? 09:01, Wang YanQing ??: > On Sat, Apr 06, 2013 at 01:52:09PM +0800, Zhang Yanfei wrote: >> ? 2013?04?03? 17:43, Wang YanQing ??: >>> I get garbage output of /proc/cmdline and in dmesg when I >>> use kexec to load new kernel bzImage without append command >>> line like below: >>> >>> kexec -l bzImage --initrd=initramfs. >> >> Hello Wang >> >> I tried this: >> >> ./build/sbin/kexec -l /boot/vmlinuz-2.6.32-279.el6.i686 --initrd=/boot/initramfs-2.6.32-279.el6.i686.img >> >> But nothing happened and it seemed the command loaded the kernel successfully. >> Can you describe your situation more concretely, please? > Yes, it will load the kernel successfully, but when you use kexec -e to run into > the loaded kernel, in the new kernel context, you will get garbage output when > execute `cat /proc/cmdline`, and you also can see the garbage in "Kernel command > line" from dmesg. With no commandline, can the new kernel boot? I tried in my box and the new kernel just panicked for it cannot find a root= argument in its commandline. Thanks Zhang > > I am sure you will see this issue, because when user pass no cmdline, and cmdline_len > will because zero, so the line below in setup_linux_bootloader_parameters_high will > not work: > cmdline_ptr[cmdline_len - 1] = '\0'; > > Thanks >
