linux-kernel - [PATCH 0/2 v2] x86: Improve secondary CPU bring-up process robustness

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Date:	Tue, 19 Jun 2012 14:14:19 +0200
From:	Igor Mammedov <imammedo@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	prarit@...hat.com, oleg@...hat.com, rob@...dley.net,
	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, luto@....edu, suresh.b.siddha@...el.com,
	avi@...hat.com, imammedo@...hat.com, a.p.zijlstra@...llo.nl,
	johnstul@...ibm.com, arjan@...ux.intel.com
Subject: [PATCH 0/2 v2] x86: Improve secondary CPU bring-up process robustness

Reproduced mostly in virt. environments, where physical CPUs are shared
beetween many guests and on overcommited host guest's CPUs may stall
and lead to master CPU 'canceling' CPU bring-up. But in reality being
onlined CPU continued to boot and caused hangs when onlining another CPU.

Now, I'm trying do fix issue a bit earlier. I hope it's better than
the first attempt: https://lkml.org/lkml/2012/5/9/125
Please review.

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