linux-kernel - Re: [PATCH 3.0-rc3, v2] i915: Fix gen6 (SNB) GPU stalling

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Message-ID: <87zklgnyj0.fsf@eliezer.anholt.net>
Date:	Fri, 17 Jun 2011 10:44:19 -0700
From:	Eric Anholt <eric@...olt.net>
To:	Daniel J Blueman <daniel.blueman@...il.com>,
	Dave Airlie <airlied@...hat.com>
Cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Ben Widawsky <ben@...dawsk.net>,
	Kenneth Graunke <kenneth@...tecape.org>,
	Yi Sun <yi.sun@...el.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Mengmeng Meng <mengmeng.meng@...el.com>,
	Robert Hooker <sarvatt@...ntu.com>,
	Daniel J Blueman <daniel.blueman@...il.com>
Subject: Re: [PATCH 3.0-rc3, v2] i915: Fix gen6 (SNB) GPU stalling

On Sat, 18 Jun 2011 00:42:00 +0800, Daniel J Blueman <daniel.blueman@...il.com> wrote:
> Workaround Sandy Bridge GPU stalls by allowing the blitter command streamer
> to write interrupt state to the Hardware Status Page when a MI_USER_INTERRUPT
> command is decoded.
> 
> v1->v2: Moved to prior interrupt handler installation and RMW flags as per
> feedback.

We shouldn't be RMWing.  We're the driver, we're supposed to know what
we want.  I'm backing that bit out, will do another round of testing,
and send it off.

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