linux-kernel - Re: linux-next: Tree for Aug 21 [ screen corruption in graphical mode ]

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Message-ID: <CA+icZUVLau7AgZvcnWKjx=tc4WeuJ3qEH7qQta+YLKDmxk6QvA@mail.gmail.com>
Date:	Wed, 21 Aug 2013 20:11:27 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Sedat Dilek <sedat.dilek@...il.com>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	linux-next <linux-next@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>
Subject: Re: linux-next: Tree for Aug 21 [ screen corruption in graphical mode ]

On Wed, Aug 21, 2013 at 3:44 PM, Daniel Vetter <daniel@...ll.ch> wrote:
> On Wed, Aug 21, 2013 at 12:35:08PM +0200, Sedat Dilek wrote:
>> On Wed, Aug 21, 2013 at 11:21 AM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>> > Hi all,
>> >
>> > There will be no linux-next trees on Aug 23 or 26.
>> >
>> > Changes since 20130820:
>> >
>> > New tree: aio-direct
>> >
>> > Removed tree: xilinx (at maintainer's request)
>> >
>> > The xfs tree still had its build failure for which I reverted a commit.
>> >
>> > The trivial tree gained conflicts against the crypto, net-next and
>> > wireless trees.
>> >
>> > The aio tree gained conflicts against the aio-direct tree.
>> >
>> > The akpm-current tree gained conflicts against the modules and aio-direct
>> > trees.
>> >
>> > ----------------------------------------------------------------------------
>> >
>>
>> Hi,
>>
>> I still have this issue with next-20130821 and "Linux v3.11-rc6 plus
>> drm-intel-nightly on top"
>> Any new development on this?
>> Patches?
>
> Tbh I'm at a loss what we could try above&beyond what Chris has already
> tried out.
>
>> Currently, I have two workarounds:
>>
>> [1] Revert this commit:
>>
>> commit 5456fe3882812aba251886e36fe55bfefb8e8829
>> "drm/i915: Allocate LLC ringbuffers from stolen"
>
> Since with a rather decent chance the next testing cycle I'll do this
> friday will be the last chunk of features for 3.12 I'll probably drop the
> above patch from my queue and we can try again in 3.13.
>

Inspired by [1] I have switched from UXA to SNA...
...and applied "[PATCH] drm/i915: Cleaning up the relocate entry
function" on top of next-20130821...
...and can NOT see the screen corruptions anymore.

Can you explain that?

- Sedat -

[1] http://cynic.cc/blog//posts/sna_acceleration_vs_uxa/
[2] http://lists.freedesktop.org/archives/intel-gfx/2013-August/032182.html
[3] https://patchwork.kernel.org/patch/2847846/

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