Under loongson platform,use command: kexec -l vmlinux... --append="root=UUID=28e1..." --initrd=... kexec -e quick restart failed like this: [ 3.420791] VFS: Cannot open root device "UUID=6462a8a4-02fb-49ff-bcb6-54fe53813c2a" or unknown-block(0,0): error -6 [ 3.431262] Please append a correct "root=" boot option; here are the available partitions: ... ... ... [ 3.543175] 0801 4194304 sda1 554e69cc-01 [ 3.543175] [ 3.549494] 0802 62914560 sda2 554e69cc-02 [ 3.549495] [ 3.555818] 0803 8388608 sda3 554e69cc-03 [ 3.555819] [ 3.562139] 0804 174553229 sda4 554e69cc-04 [ 3.562139] [ 3.568463] 0b00 1048575 sr0 [ 3.568464] driver: sr [ 3.574524] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 3.582750] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]--- The reason of this problem: The kernel cannot parse the UUID,UUID is parsed in the initrd. Loongson platform obtain the initrd through cmdline in kernel. In kexec-tools, initrd is not added to cmdline. The following two steps to solve this problem. Hui Li (2): kexec-tools: mips: Add CONFIG_LOONGSON option. kexec-tools: mips: Add initrd parameter to cmdline configure.ac | 5 ++++ kexec/arch/mips/crashdump-mips.h | 6 ++++- kexec/arch/mips/kexec-elf-mips.c | 43 ++++++++++++++++++++++++++++++++ 3 files changed, 53 insertions(+), 1 deletion(-) -- 2.20.1 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
