Re: [PATCH] X86/CPU: Avoid 100ms sleep for cpu offline during S3

[Borislav Petkov <bp@alien8.de>]

Hi,

On Wed, Aug 06, 2014 at 01:13:21PM +0000, Lan, Tianyu wrote:
> Have you tried my attached kernel config file? When someone reported
> the issue to me, I also was very hard to reproduce the issue by my
> own config file. Maybe once 100 tries. But I can reproduced the issue
> every time with the attached configure file on several my machines and
> even on server.

first of all, please do not top-post:

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

Now, it looks like the issue is timing-related, depending on when we're
going to see CPU_DEAD, before or after the msleep. Thus, if some distro
config runs more crap on the suspend path and we don't see the CPU_DEAD
before we sleep for 100ms, then we get to wait at least once and it
shows in the suspend trace.

So, using the completion timeout seems like a net improvement for such
configs and thus for any config.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--