From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: The HPET issue on Linux
Date: Wed, 06 Jan 2010 16:42:30 -0600
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References: <201001061748.52689.sheng@linux.intel.com> <20100106100957.GF4905@redhat.com> <4B44648F.2010702@redhat.com> <4B44D82A.9030805@us.ibm.com> <4B44E27F.6090406@us.ibm.com> <4B44E330.4080805@codemonkey.ws> <20100106194411.GA24476@redhat.com> <4B44E9DA.2050000@codemonkey.ws> <20100106203733.GB24476@redhat.com>
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Cc: Beth Kon <eak@us.ibm.com>, dlaor@redhat.com,
	Sheng Yang <sheng@linux.intel.com>, kvm@vger.kernel.org
To: Gleb Natapov <gleb@redhat.com>
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On 01/06/2010 02:37 PM, Gleb Natapov wrote:
> We have exactly that hook in apic already and that's how RTC determines
> that interrupt was coalesced.
>    

AFAICT, apic_irq_delivered is only reset explicitly by the RTC when the 
line is lowered.  It's not currently lowered based on EOI.

How can this mechanism be used with the HPET when operating in edge 
triggered mode?

Regards,

Anthony Liguori

> --
> 			Gleb.
>