Messages in this thread | | | Date | Wed, 21 Sep 2022 14:55:04 -0500 | Subject | Re: [PATCH] ACPI: processor_idle: Skip dummy wait for processors based on the Zen microarchitecture | From | "Limonciello, Mario" <> |
| |
On 9/21/2022 14:51, Borislav Petkov wrote: > On Wed, Sep 21, 2022 at 07:15:07AM -0700, Dave Hansen wrote: >> In the end, the delay is because of buggy, circa 2006 chipsets? So, we >> use a CPU vendor specific check to approximate that the chipset is >> recent and not affected by the bug? If so, is there no better way to >> check for a newer chipset than this? > > So I did some git archeology but that particular addition is in some > conglomerate, glued-together patch from 2007 which added the cpuidle > tree: > > commit 4f86d3a8e297205780cca027e974fd5f81064780 > Author: Len Brown <len.brown@intel.com> > Date: Wed Oct 3 18:58:00 2007 -0400 > > cpuidle: consolidate 2.6.22 cpuidle branch into one patch > > > so the most precise check here should be to limit that dummy read to > that Intel chipset which needed it. Damned if I knew how to figure out > which... >
Functionally most Intel platforms use intel_idle though these days though, right?
| |