If there is no valid initrd, but root=UUID or root=LABEL is used
in the command line, boot hangs like this:
[ 5.739815] VFS: Cannot open root device "UUID=19957230-2e15-494c-8dfa-84aab3591961" or unknown-block(0,0): error -6
[ 5.750280] Please append a correct "root=" boot option; here are the available partitions:
[ 5.856059] 0800 125034840 sda
[ 5.856061] driver: sd
[ 5.862124] 0801 307200 sda1 d5077411-3d87-4f85-b312-8cc309ef9073
[ 5.862128]
[ 5.870603] 0802 1048576 sda2 aae0dd30-e5f5-44e1-994e-d47bf5ce2e52
[ 5.870606]
[ 5.879080] 0803 52428800 sda3 759079ee-85fa-4636-9de7-1ac0643ab87e
[ 5.879083]
[ 5.887558] 0804 8388608 sda4 439c4b0a-7b4f-4434-82f1-f9d380b55fb9
[ 5.887560]
[ 5.896035] 0805 62860288 sda5 ee52e951-1315-4fab-a3e5-45c6eeae6ce6
[ 5.910575] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 5.918796] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---
In the above log, the sectors are not consistent with the output
of fdisk command, fix it.
[root@linux loongson]# fdisk -l /dev/sda
Disk /dev/sda: 119.2 GiB, 128035676160 bytes, 250069680 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 01D1BA1C-232F-45CA-AC12-0AF2A5D8CE0D
Device Start End Sectors Size Type
/dev/sda1 2048 616447 614400 300M EFI System
/dev/sda2 616448 2713599 2097152 1G Linux filesystem
/dev/sda3 2713600 107571199 104857600 50G Linux filesystem
/dev/sda4 107571200 124348415 16777216 8G Linux swap
/dev/sda5 124348416 250068991 125720576 60G Linux filesystem
Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
---
block/genhd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/genhd.c b/block/genhd.c
index b8b6759..453ce42 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -761,7 +761,7 @@ void __init printk_all_partitions(void)
printk("%s%s %10llu %pg %s",
bdev_is_partition(part) ? " " : "",
bdevt_str(part->bd_dev, devt_buf),
- bdev_nr_sectors(part) >> 1, part,
+ bdev_nr_sectors(part), part,
part->bd_meta_info ?
part->bd_meta_info->uuid : "");
if (bdev_is_partition(part))
--
2.1.0
