svn commit: r219676 - head/sys/x86/x86
John Baldwin
jhb at freebsd.org
Tue Mar 15 21:01:15 UTC 2011
On Tuesday, March 15, 2011 3:47:20 pm Jung-uk Kim wrote:
> Author: jkim
> Date: Tue Mar 15 19:47:20 2011
> New Revision: 219676
> URL: http://svn.freebsd.org/changeset/base/219676
>
> Log:
> Do not let machdep.tsc_freq modify tsc_freq itself. It is bad for i386 as
> it does not operate atomically. Actually, it serves no purpose.
>
> Noticed by: bde
Ouch, please revert! We have depended on this for testing to workaround
BIOS issues (e.g. the USB SMI# handler firing at a bad time during boot
causing the TSC frequency to be calculated incorrectly). I agree it's a hack
that this works, but it has actually proven useful in the past.
--
John Baldwin
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