linux-kernel - RE: [PATCH V6 0/6] Intel memory b/w monitoring support

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F3A00723E@ORSMSX114.amr.corp.intel.com>
Date:	Sat, 12 Mar 2016 01:56:13 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Vikas Shivappa <vikas.shivappa@...ux.intel.com>
CC:	"Shivappa, Vikas" <vikas.shivappa@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...nel.org" <mingo@...nel.org>,
	"Shankar, Ravi V" <ravi.v.shankar@...el.com>,
	"Yu, Fenghua" <fenghua.yu@...el.com>,
	"Anvin, H Peter" <h.peter.anvin@...el.com>
Subject: RE: [PATCH V6 0/6] Intel memory b/w monitoring support

Some tracing printk() show that we are calling update_sample() with totally bogus arguments.

There are a few good calls, then I see rmid=-380863112 evt_type=-30689 first=0

That turns into a wild vrmid, and we fault accessing mbm_current->prev_msr

-Tony