linux-kernel - RE: [PATCH 6/6] x86-mce: ensure the MCP timer is not already set in the mce_timer

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F328574D1@ORSMSX114.amr.corp.intel.com>
Date:	Wed, 9 Jul 2014 21:04:06 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Havard Skinnemoen <hskinnemoen@...gle.com>,
	Borislav Petkov <bp@...en8.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Ewout van Bekkum" <ewout@...gle.com>
Subject: RE: [PATCH 6/6] x86-mce: ensure the MCP timer is not already set in
 the mce_timer_fn.

+	/* Ensure a CMCI interrupt can't preempt this. */
+	local_irq_save(flags);
 	if (mce_available(__this_cpu_ptr(&cpu_info))) {
 		machine_check_poll(MCP_TIMESTAMP,
 				&__get_cpu_var(mce_poll_banks));

Does this remove the problem that you fixed in part4?  If a CMCI can
no longer interrupt a poll ... do we really need the locks you added?

-Tony
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