RE: [PATCH] more robust halt_light

From: Seth, Rohit <rohit.seth_at_intel.com>
Date: 2004-03-04 13:48:31
>-----Original Message-----
>From: Grant Grundler [mailto:iod00d@hp.com]
>Sent: Wednesday, March 03, 2004 3:35 PM
>To: Alex Williamson
>Cc: Seth, Rohit; linux-ia64
>Subject: Re: [PATCH] more robust halt_light
>
>On Wed, Mar 03, 2004 at 02:08:00PM -0700, Alex Williamson wrote:
>>
>>    I was curious about that myself, but I thought I remembered from
>> Stephane that the perf counters didn't really recover from a
>> PAL_HALT_LIGHT on McKinley.
>
>The way I recall Stephane explaining it to me was the PMU
>was completely disabled after returning from PAL_HALT_LIGHT.
>ISTR no PAL fix was never released for Mckinley. And even if
>one was, we'd have to convince HP firmware teams to roll
>and qualify it. Unlikely.

In the new scheme that we are proposing, the PMUs are disabled at the
time of entry to PAL_HALT_LIGHT.  They will stay that way after
returning from PAL call.

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Received on Wed Mar 3 21:49:18 2004

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