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proposal to remove backward compatibility
[Changing the subject because this issue is too important to be hidden
under an inappropriate subject line.]
On 2008年8月15日, der Mouse wrote:
> > We simply need to make the decision, and from that point forward, no
> > more need for new compat code in the kernel.
>
> No more ability to upgrade the kernel while running the previous
> userland?
>
> I would consider that a crippling regression.
Me too. My usual upgrade process involves:
1) build new versions of everything;
2) place a new kernel somewhere that the boot loader can find it,
without interfering with the ability to boot an old kernel;
3) boot new kernel with old userland;
- if it fails, go back to old kernel;
4) install new userland;
5) boot new kernel with new userland.
Now, in between steps 2 and 4, I have the ability to boot either an old
or a new kernel. If I had also installed a new libc in step 2, then I
would lose the ability to run the "old" system, because even with an old
kernel, I would get a new libc (which might not even work with the old
kernel).
--apb (Alan Barrett)
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