Re: [PATCH 6/6] x86-mce: ensure the MCP timer is not already set in the mce_timer_fn.

From: Havard Skinnemoen
Date: Wed Jul 09 2014 - 19:01:17 EST

On Wed, Jul 9, 2014 at 2:04 PM, Luck, Tony <tony.luck@xxxxxxxxx> wrote:
> + /* 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?

It's possible this fixes part of the problem. But I still think
there's a race between multiple CPUs polling shared banks.

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