linux-kernel - RE: [PATCH 1/4] tile: Add support for handling PMC hardware

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Message-ID: <BAB94DBB0E89D8409949BC28AC95914C5D67FFC3@USMAExch1.tad.internal.tilera.com>
Date:	Thu, 6 Mar 2014 10:12:54 +0000
From:	Tony Lu <zlu@...era.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Chris Metcalf <cmetcalf@...era.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/4] tile: Add support for handling PMC hardware

>-----Original Message-----
>From: Peter Zijlstra [mailto:peterz@...radead.org]
>Sent: Thursday, March 06, 2014 5:11 PM
>To: Tony Lu
>Cc: Paul Mackerras; Ingo Molnar; Arnaldo Carvalho de Melo; Chris Metcalf;
>linux-kernel@...r.kernel.org
>Subject: Re: [PATCH 1/4] tile: Add support for handling PMC hardware
>
>On Thu, Mar 06, 2014 at 06:13:48AM +0000, Tony Lu wrote:
>
>The changelogs are all very sparse. But in general the stuff looks to
>have the right shape.
>
>It looks like you do software NMIs with interrupt priority levels; which
>is a perfectly fine way, other archs do the same.
>
>One thing I didn't spot is a tile irq_work implementation; perf likes to
>have one.

We do not have tile irq_work for now. It seems like perf works fine even without the arch irq_work. Anyway, we will investigate it, and submit it as a separate patch when it gets ready.

Thanks
-Tony

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