June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Kernel panic
While things started off well, they ended badly:
[ 1.886379] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)[ 1.895105] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0, 0)
This is a good example of a kernel panic. A panic occurs when the kernel encounters an unrecoverable error. By default, it will print out a message to the console and then halt. You can set the panic command-line parameter to allow a few seconds before reboots following a panic. In this case, the unrecoverable error is no root filesystem, illustrating that a kernel is useless without a user space to control it. You can supply a user space by providing a root filesystem, either as a ramdisk ...
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