Will system compiled with amdfam10 run on Vishera aka bdver2

[konstk]

Will system compiled with amdfam10 run on Vishera aka bdver2? The whole system was compiled for a Phenom II X4 965 with CFLAG amdfam10.

[Ant P.]

No. Phenom II has the 3DNow instruction set, newer AMD chips don't. If you want it to run on both then you'll need to rebuild at least the @system set with -march=amdfam10 -mno-3dnow.

[Jaglover]

While not arguing with previous post I'd say nothing in the system is built with 3DNow, so the system will run, you will need to rebuild multimedia (and possibly some other) applications.
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Please learn how to denote units correctly!

[Ant P.]

Yeah, you've got a point, but it's better to be on the safe side - it only takes one of those instructions to crash a program, and things like glibc have pretty crazy low-level optimisations.

[wrc1944]

Hmmm.... I have my main box with three Gentoo installs on it (same hard disk, different partitions). I'm currently running an Am3 motherboard (not the + version) with a Phenom II x6 1090t cpu, but am planning on upgrading in the near future to an Am3+ board and either a Pilediver or if they come out within late 2013 a Steamroller.

Ive been using either -march=amdfam10 and recently changed to -march=native, and have in the past upgraded boards and cpus and could always boot into Gentoo and most other distros.

With Gentoo, after a reboot I generally always do a complete emerge -e @world just to smooth any rough edges out and compile new support into the system, but when somebody mentions glibc I really notice.

Anyone think I will run into problems considering the move to a radically different board/cpu architecture that the Bulldozer and beyond hardware presents?

I was hoping to get away with perhaps first building new kernels with any needed support before switching out the board/cpu, but now I'm questioning if that would even work.

If it came to it, maybe chroot in from a Gentoo live cd and build a kernel with support for the new hardware, or even just do a compete emerge -e @world from the chroot?
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Main box- ASRock 880GM-LE AM3
Phenom II x6 1090T, 3.2 GHz, 8GB GSkill DDR3 1333mhz
Samsung SATA 500GB, Radeon HD 6570 2GB DDR3
Gentoo ~x86, ~amd64, glibc-2.17, gcc-4.7.2, kernel 3.8.11, 3.9.0

[konstk]

Thanks guys for the replies above. Haven't yet changed to the FX-8350, will in the next week and see if it works without a recompile.

@wrc1944 I think emerge -e @system from a chroot from a Gentoo cd will work if your upgraded pc doesn't boot.

I guess people that say you don't need a maintenance partition are wrong. A small maintenance partition compiled for generic x86_64 is a good idea.

Lennart Poettering and the move to systemd is wrong headed. They say they want to move everything to /usr cause "advanced features in today's systems can not really bootup with an empty /usr anymore." Well a small maintenance partition is one reason not to move everything and that is really needed.

[wrc1944]

konstk,
Please let us know what happens. I assume you already have an am3+ board with a bdver2 bios update?

In my case, I'm betting I can just replace my current x6 1090t with an el cheapo am3 board with a nice high end am3+ board and piledriver or steamroller cpu, and simply reboot using my current install and hard disk. At least that's been my experience with amd systems for many years.

Then, change the make.conf flag to bdver2 or even just keep my current -march=native, and do an emerge -e @world.
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Main box- ASRock 880GM-LE AM3
Phenom II x6 1090T, 3.2 GHz, 8GB GSkill DDR3 1333mhz
Samsung SATA 500GB, Radeon HD 6570 2GB DDR3
Gentoo ~x86, ~amd64, glibc-2.17, gcc-4.7.2, kernel 3.8.11, 3.9.0

[konstk]