From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: Stop ring before doing readiness check
Date: Wed, 13 Sep 2017 17:13:57 +0300 [thread overview]
Message-ID: <20170913141357.GQ4914@intel.com> (raw)
In-Reply-To: <150531168675.4880.15241718063068478347@mail.alporthouse.com>
On Wed, Sep 13, 2017 at 03:08:06PM +0100, Chris Wilson wrote:
> Quoting Mika Kuoppala (2017-09-13 15:01:17)
> > Evidence indicates that even if the hardware happily
> > tells us to proceed with reset, it really isn't ready.
> > Resetting a freely running batchbuffer after we have
> > got ack for readiness, still can cause a system hang.
>
> Hmm, so we see it on early gen and late gen. I suggest we do it
> universally (except gen2 which is lacking the mechanism). It's unlikely
> that the requirement disappeared just for a couple of gen, more likely
> that we simply haven't triggered the pathological behaviour.
Could just try setting ring enable=false on gen2 maybe? But we don't have
GPU reset for gen2 anyway so I guess it doesn't matter.
--
Ville Syrjälä
Intel OTC
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next prev parent reply other threads:[~2017-09-13 14:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-13 14:01 [PATCH] drm/i915: Stop ring before doing readiness check Mika Kuoppala
2017-09-13 14:08 ` Chris Wilson
2017-09-13 14:13 ` Ville Syrjälä [this message]
2017-09-13 14:15 ` Mika Kuoppala
2017-09-13 14:20 ` ✓ Fi.CI.BAT: success for " Patchwork
2017-09-14 0:07 ` ✗ Fi.CI.IGT: failure " Patchwork
2017-09-14 10:33 ` Chris Wilson
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