On Fri, Apr 18, 2025 at 02:11:44PM +0200, Ingo Molnar wrote:
No, it doesn't really 'need' a stable tag, it has a Fixes tag already, which gets processed by the -stable team.
Last time I asked Greg, he said they scan for those tags but it doesn't hurt to Cc stable as it helps.
Greg?
Also, the bug is old, 1.5 years old:
Date: Sat, 2 Dec 2023 12:50:23 +0100
plus the erratum is a perf-counters information quality bug affecting what appears to be a limited number of models, with the workaround
No, the fix is needed because Zen2 and newer won't set MSR_K7_HWCR_IRPERF_EN_BIT. It needs to go everywhere.
likely incorporated in BIOS updates as well.
You can very much forget that argument. I have hard BIOS adoption data which paints an abysmal picture. So NEVER EVER rely on BIOS to do anything. Especially for Zen1 which is oooold in BIOS time.
Leave it up to the -stable team whether they think it's severe enough to backport it?
No, they leave it to us section maintainers to decide AFAIK.
Thx.