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List: gentoo-user
Subject: [gentoo-user] Re: Migrate install from Intel 6th gen to AMD Zen 4
From: Nikos Chantziaras <realnc () gmail ! com>
Date: 2023-08-29 12:40:50
Message-ID: uckp0k$mk4$1 () ciao ! gmane ! io
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On 29/08/2023 13:22, Victor Ivanov wrote:
> Hello,
>
> I will soon be upgrading from a mobile Skylake platform to a desktop
> Ryzen 7000 series and a full re-install is not an option unless all
> else fails. I'm thinking of simply moving the drive and recompile as
> necessary. I don't see why this wouldn't work, but wanted to double
> check with the community just in case.
The only thing I did after upgrading to a different platform (Intel to
AMD) is *first* switching to sys-kernel/gentoo-kernel-bin on the old
system, move my storage devices to the new system, and then switch back
to sys-kernel/gentoo-sources on the new system.
gentoo-kernel-bin is a pre-compiled kernel that serves as a fallback in
case gentoo-sources won't boot. My CFLAGS are:
-O2 -pipe -mtune=native -march=native -ftree-vectorize
and didn't need changing. CPU_FLAGS_X86 did of course did need changing
(with cpuid2cpuflags.)
Usually, critical packages that serve to get you a command-line login
don't end up using amy "weird" CPU instructions (like AVX512 or
whatever), but other packages might. So it's best to rebuild @world once
your new system can boot.
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