Re: [Xen-devel] address space reorganization

[Jacob Gorm Hansen <jacobg@xxxxxxx>]

Kip Macy wrote:
> > > That works OK for the kernel, but you might have user space apps that
> > > have adapted their behviour based on what the've found in /proc/cpuinfo.
> > A compromise then would be to lie to userspace and still recalibrate the
> > kernel.
>
> If you're saying what I think you are - I don't think people who have
> customized their apps for SSE2 would like that.
This is what Keir was suggesting, but still giving the kernel a chance
to use SSE[12] for its own purposes. It is not perfect, the only perfect
solution would alert user-space apps about the impending change, so that
they can react to or veto the migration.

Jacob


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