From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Cc: matthew.auld@intel.com
Subject: Re: [PATCH 3/3] drm/i915: Flush the workqueue before draining
Date: Thu, 04 Jul 2019 13:22:17 +0300 [thread overview]
Message-ID: <87lfxe2j6u.fsf@gaia.fi.intel.com> (raw)
In-Reply-To: <20190703171913.16585-4-chris@chris-wilson.co.uk>
Chris Wilson <chris@chris-wilson.co.uk> writes:
> Trying to drain a workqueue while we may still be adding to it from
> background tasks is, according to kernel/workqueue.c, verboten. So, add
> a flush_workqueue() at the start of our cleanup procedure.
I don't get it. drain_workqueue does it's own flushing.
-Mika
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 9d132c9d17b0..d2f9af3a16dc 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2472,6 +2472,7 @@ static inline void i915_gem_drain_workqueue(struct drm_i915_private *i915)
> */
> int pass = 3;
> do {
> + flush_workqueue(i915->wq);
> rcu_barrier();
> i915_gem_drain_freed_objects(i915);
> } while (--pass);
> --
> 2.20.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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next prev parent reply other threads:[~2019-07-04 10:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-03 17:19 Just a selection of some fine brown paper bags Chris Wilson
2019-07-03 17:19 ` [PATCH 1/3] drm/i915/gem: Defer obj->base.resv fini until RCU callback Chris Wilson
2019-07-03 18:06 ` [PATCH v2] " Chris Wilson
2019-07-04 13:53 ` [PATCH 1/3] " Mika Kuoppala
2019-07-04 14:02 ` Chris Wilson
2019-07-04 14:18 ` Mika Kuoppala
2019-07-04 14:22 ` Chris Wilson
2019-07-03 17:19 ` [PATCH 2/3] drm/i915/gtt: Defer the free for alloc error paths Chris Wilson
2019-07-04 10:14 ` Mika Kuoppala
2019-07-04 10:28 ` Matthew Auld
2019-07-04 10:40 ` Chris Wilson
2019-07-04 10:58 ` Mika Kuoppala
2019-07-04 11:02 ` Chris Wilson
2019-07-04 11:40 ` Mika Kuoppala
2019-07-03 17:19 ` [PATCH 3/3] drm/i915: Flush the workqueue before draining Chris Wilson
2019-07-04 10:22 ` Mika Kuoppala [this message]
2019-07-04 10:26 ` Chris Wilson
2019-07-04 12:39 ` Mika Kuoppala
2019-07-03 19:36 ` ✗ Fi.CI.CHECKPATCH: warning for series starting with [v2] drm/i915/gem: Defer obj->base.resv fini until RCU callback (rev2) Patchwork
2019-07-03 19:53 ` ✓ Fi.CI.BAT: success " Patchwork
2019-07-05 0:35 ` ✓ Fi.CI.IGT: " Patchwork
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