在 2022-04-01星期五的 11:01 +0100，Patrick O'Callaghan写道：
> I came across kexec(8) and wondered if anyone has used it in Fedora
> to
> enable rapid rebooting after a kernel update. Just curious.
Yes, I kexec every time after a kernel update, since POST will take
forever on a epyc system.
And there is a script to load the latest kernel, you can put it
somewhere, after a kernel update, just run the script and systemctl
kexec, to direct load the newest kernel.
#!/bin/bash
set -x
NEWEST_KERNEL_VERSION="$(
rpm --query --queryformat='%{VERSION}-%{RELEASE}.%{ARCH}\n' kernel \
| sort --version-sort --reverse \
| head --lines=1
)"
kexec --load --reuse-cmdline \
--initrd="/boot/initramfs-$NEWEST_KERNEL_VERSION.img" \
"/boot/vmlinuz-$NEWEST_KERNEL_VERSION"
>
> poc
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Qiyu Yan
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