linux-kernel - RE: [PATCH v2 2/2] Do not change worker's running cpu in cmci

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F19D57AA5@ORSMSX108.amr.corp.intel.com>
Date:	Fri, 19 Oct 2012 17:21:17 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Borislav Petkov <bp@...64.org>, Tang Chen <tangchen@...fujitsu.com>
CC:	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"miaox@...fujitsu.com" <miaox@...fujitsu.com>,
	"laijs@...fujitsu.com" <laijs@...fujitsu.com>,
	"wency@...fujitsu.com" <wency@...fujitsu.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>
Subject: RE: [PATCH v2 2/2] Do not change worker's running cpu in
 cmci_rediscover().

> In this case, the following BUG_ON in try_to_wake_up_local() will be triggered:
> BUG_ON(rq != this_rq());

Logically this looks OK - what is the test case to trigger this?  I've done a moderate
amount of testing of cpu online/offline while injecting corrected errors (when testing
the CMCI storm patches) ... but didn't see this problem.

-Tony
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