Re: [PATCH] restore sysenter MSRs at resume

Alan Cox (alan@lxorguk.ukuu.org.uk)
11 May 2003 22:04:37 +0100


On Sul, 2003-05-11 at 20:01, Linus Torvalds wrote:
> However, the fact that the SYSENTER MSR needs to be restored makes me
> suspect that the other MSR/MTRR also will need restoring. I don't see
> where we'd be doing that, but it sounds to me like it should be done here
> too..

Some laptops certainly require the MTRR restore to happen. MSRs are
mostly less of a problem because the profiling stuff is broken on PIII
unless you disable/re-enable it across power save anyway.

Some laptops also lose all the AGP settings in the chipset.

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