linux-kernel - S3 resume regression [1cf4f629d9d2 ("cpu/hotplug: Move online calls to hotplugged cpu")]

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Date:	Wed, 11 May 2016 13:19:20 +0300
From:	Ville Syrjälä <ville.syrjala@...ux.intel.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-arch@...r.kernel.org, Rik van Riel <riel@...hat.com>,
	Rafael Wysocki <rafael.j.wysocki@...el.com>,
	"Srivatsa S. Bhat" <srivatsa@....edu>,
	Peter Zijlstra <peterz@...radead.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Sebastian Siewior <bigeasy@...utronix.de>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Steven Rostedt <rostedt@...dmis.org>,
	Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Paul Turner <pjt@...gle.com>, linux-kernel@...r.kernel.org,
	rui.zhang@...el.com, len.brown@...el.com
Subject: S3 resume regression [1cf4f629d9d2 ("cpu/hotplug: Move online calls
 to hotplugged cpu")]

Hi,

I have a Lenovo Ideapad S10-3t machine here (Atom N450, 1 core, 2 HT)
which fails to resume from S3 on 4.6-rc releases. I bisected it down to

commit 1cf4f629d9d246519a1e76c021806f2a51ddba4d
Author: Thomas Gleixner <tglx@...utronix.de>
Date:   Fri Feb 26 18:43:39 2016 +0000

    cpu/hotplug: Move online calls to hotplugged cpu

Unfortunately that won't revert cleanly, and neither does the merge
commit, so I was unable to see if that is the only problematic commit
in 4.6.

Any ideas?

Oh, and this was with acpi_idle. This machine already failed to
resume from S3 with intel_idle since forever, as detailed in
https://bugzilla.kernel.org/show_bug.cgi?id=107151
but acpi_idle worked fine until now.

My .config is attached.

-- 
Ville Syrjälä
Intel OTC

View attachment ".config" of type "text/plain" (96294 bytes)