Re: Allow playing dead in C3 for 5.15.y

On Tue, Apr 12, 2022 at 10:15:37PM +0000, Limonciello, Mario wrote:

[Public]

Hi,

A change went into 5.17 to allow CPUs to play dead in the C3 state which fixed freezes on s2idle entry if a CPU is offlined by a user. This has had some time to bake now, and a regression was identified on an ancient machine that is now fixed.

Can you please backport these commits to 5.15.y to fix that problem and avoid the regression? commit d6b88ce2eb9d2698eb24451eb92c0a1649b17bb1 ("ACPI: processor idle: Allow playing dead in C3 state")

Now queued up.

commit 0f00b1b00a44bf3b5e905dabfde2d51c490678ad ("ACPI: processor: idle: fix lockup regression on 32-bit ThinkPad T40").

There is no such commit in Linus's tree :(

thanks,

greg k-h