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Re: [Xen-devel] address space reorganization


  • To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Jacob Gorm Hansen <jacobg@xxxxxxx>
  • Date: Wed, 13 Apr 2005 20:38:18 -0700
  • Delivery-date: Thu, 14 Apr 2005 03:38:18 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

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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