Hi, here's v2 based on some IRC feedback (grammar- and punctuation-related) I am planning to add for tomorrow.
--- Title: Multiple root kernel command-line arguments Author: Thomas Deutschmann <whi...@gentoo.org> Posted: 2020-08-05 Revision: 1 News-Item-Format: 2.0 Due to genkernel-4.1 development which is changing device manager from MDEV to (E)UDEV it was noticed that some tools like kexec append an additional root argument to kernel command-line. If these tools will set root to a non-persistent device name like root=/dev/dm-3, the next boot might fail if there is *no* root device named like that in start environment (i.e. initramfs). While kexec's runscript was changed in >=sys-apps/kexec-tools-2.0.20-r2 to no longer append root kernel command-line argument when an option like "--reuse-cmdline" (default) is used, a cold reboot *without* kexec may be needed to restore kernel command-line. NOTE: This issue is *not* specific to kexec or genkernel usage. Kernel will always use last set root kernel command-line argument. Any tool which might be appending root argument without a persistent device name might cause a boot failure if system cannot find that referenced root device during boot. To avoid boot problems, user should revise their current kernel command-line (/proc/cmdline) to ensure that only *one* root kernel command-line argument is set. The usage of persistent device names like root=UUID=<...> is highly recommended. -- Regards, Thomas Deutschmann / Gentoo Linux Developer C4DD 695F A713 8F24 2AA1 5638 5849 7EE5 1D5D 74A5
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