linux-kernel - Re: [PATCH] Revert "drm/i915: Performed deferred clflush inside set-cache-level"

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Message-ID: <20150401043150.GB4638@sudip-PC>
Date:	Wed, 1 Apr 2015 10:01:50 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Chris Wilson <chris@...is-wilson.co.uk>,
	Daniel Vetter <daniel.vetter@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	David Airlie <airlied@...ux.ie>,
	Ville Syrjälä 
	<ville.syrjala@...ux.intel.com>, huax.lu@...el.com,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "drm/i915: Performed deferred clflush inside
 set-cache-level"

On Tue, Mar 31, 2015 at 04:35:49PM +0100, Chris Wilson wrote:
> On Tue, Mar 31, 2015 at 08:40:12PM +0530, Sudip Mukherjee wrote:
> > This reverts commit <0f71979ab7fbd0c71c41c2798de3d33937915434>.
> > 
> > my display was getting garbled for a moment very frequently. it looked
> > like when the screen was getting refreshed then something was going
> > wrong.
> > git bisect gave this as the first bad commit, and after reverting it
> > now display is not having that problem.
> 
> Hmm, I fear you would be just papering over a bug. Could you please file
> a bug on bugs.freedesktop.org so that we can root cause this?
> -Chris
filed at https://bugs.freedesktop.org/show_bug.cgi?id=89857

since this patch workes perfectly for me, i guess i need to apply it to
every new release till you are able to root cause and fix it.

regards
sudip
> 
> -- 
> Chris Wilson, Intel Open Source Technology Centre
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