linux-kernel - Re: [Intel-gfx] GPU hangs and X shot down with 4.11-rc6

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Message-ID: <20170425200332.GJ11432@nuc-i3427.alporthouse.com>
Date:   Tue, 25 Apr 2017 21:03:32 +0100
From:   Chris Wilson <chris@...is-wilson.co.uk>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Daniel Vetter <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        David Airlie <airlied@...ux.ie>,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [Intel-gfx] GPU hangs and X shot down with 4.11-rc6

On Tue, Apr 25, 2017 at 06:41:20PM +0200, Michal Hocko wrote:
> Hi,
> I have just experienced X being shut down once with 4.11-rc2 and 2 times
> with 4.11-rc6 kernel.  I do not remember seeing something like this
> before but it is quite possible I was just lucky to not trigger this
> issue before. It always happened while I was working on a presentation
> in LibreOffice which I do very seldom. The kernel log contains:
> 
> [ 7456.721893] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg [3594], reason: Hang on render ring, action: reset
> [ 7456.721897] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
> [ 7456.721898] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
> [ 7456.721900] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
> [ 7456.721901] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
> [ 7456.721902] [drm] GPU crash dump saved to /sys/class/drm/card0/error
> [ 7456.721925] drm/i915: Resetting chip after gpu hang
> [ 7456.722117] [drm] RC6 on
> [ 7456.734588] [drm] GuC firmware load skipped
> [ 7464.686209] drm/i915: Resetting chip after gpu hang
> [ 7464.686284] [drm] RC6 on
> [ 7464.702469] [drm] GuC firmware load skipped
> [ 7472.686180] drm/i915: Resetting chip after gpu hang
> [ 7472.686241] [drm] RC6 on
> [ 7472.704565] [drm] GuC firmware load skipped
> [ 7480.686179] drm/i915: Resetting chip after gpu hang
> [ 7480.686241] [drm] RC6 on
> [ 7480.704583] [drm] GuC firmware load skipped
> [ 7493.678130] drm/i915: Resetting chip after gpu hang
> [ 7493.678206] [drm] RC6 on
> [ 7493.696505] [drm] GuC firmware load skipped
> 
> The kernel message tells that the problem might be anywhere and I should
> report to freedesktop but I haven't changed the userspace recently so it
> smells more like a kernel bug to me. Does this ring bells? The GPU crash
> dump is attached in case it is useful.

There are lots of very similar GPU hangs for mesa across a wide range of
kernels, with several reports noting a correlation with libreoffice.

At first glance, I would say you were just unlucky to hit it.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre