Re: [RESEND PATCH v6] x86/hpet: Reduce HPET counter read contention

From: Waiman Long
Date: Tue Sep 06 2016 - 13:26:26 EST


On 09/06/2016 11:50 AM, Thomas Gleixner wrote:
On Tue, 6 Sep 2016, Waiman Long wrote:
This is done by using a combination word with a sequence number and
a bit lock. The CPU that gets the bit lock will be responsible for
reading the HPET counter and update the sequence number. The others
will monitor the change in sequence number and grab the HPET counter
value accordingly. This change is only enabled on SMP configuration.
That hardly matches the implementation.

Thanks,

tglx
Sorry, I forgot to update the change log accordingly. Will send out a new patch to address that.

Cheers,
Longman