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SubjectRe: [PATCH AUTOSEL 5.1 013/219] x86/tsc: Use CPUID.0x16 to calculate missing crystal frequency

On Mon, Jul 15, 2019 at 9:38 PM Sasha Levin <> wrote:
> From: Daniel Drake <>
> [ Upstream commit 604dc9170f2435d27da5039a3efd757dceadc684 ]

In my opinion this is not stable kernel material.

It alone does not solve a particular bug. It's part of a larger effort
to decrease usage of the 8254 PIT on modern platforms, which solves a
real problem (see "x86: skip PIT initialization on modern chipsets"),
but I'd conservatively recommend just leaving these patches out of the
stable tree. The problem has existed for a while without a
particularly wide impact, and there is a somewhat documented
workaround of changing BIOS settings.


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