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From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 02/39] drm/i915/selftests: Take a breath during check_partial_mappings()
Date: Wed, 02 Jan 2019 13:07:31 +0200	[thread overview]
Message-ID: <87sgyb48ss.fsf@gaia.fi.intel.com> (raw)
In-Reply-To: <20190102094139.24014-2-chris@chris-wilson.co.uk>

Chris Wilson <chris@chris-wilson.co.uk> writes:

> With kasan on a slow machine, it can take an age to check all the
> partial mappings in a single iteration, so break it up with a
> cond_resched) to avoid RCU stall reports.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/selftests/i915_gem_object.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_object.c b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
> index c3999dd2021e..be7ecb66ad11 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_gem_object.c
> +++ b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
> @@ -238,6 +238,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj,
>  		u32 *cpu;
>  
>  		GEM_BUG_ON(view.partial.size > nreal);
> +		cond_resched();

Didn't get all the intricacies of rcu, but looks of it
this marks up the need of urgent quiescent state, even
if there is nothing to reschedule so should help for stall
reports.

Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>


>  
>  		err = i915_gem_object_set_to_gtt_domain(obj, true);
>  		if (err) {
> -- 
> 2.20.1
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  reply	other threads:[~2019-01-02 11:09 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-02  9:41 [PATCH 01/39] drm: Reorder set_property_atomic to avoid returning with an active ww_ctx Chris Wilson
2019-01-02  9:41 ` [PATCH 02/39] drm/i915/selftests: Take a breath during check_partial_mappings() Chris Wilson
2019-01-02 11:07   ` Mika Kuoppala [this message]
2019-01-02 11:14     ` Chris Wilson
2019-01-02  9:41 ` [PATCH 03/39] drm/i915: Return immediately if trylock fails for direct-reclaim Chris Wilson
2019-01-02  9:41 ` [PATCH 04/39] drm/i915/userptr: Avoid struct_mutex recursion for mmu_invalidate_range_start Chris Wilson
2019-01-02  9:41 ` [PATCH 05/39] drm/i915/userptr: Probe vma range before gup Chris Wilson
2019-01-02  9:41 ` [PATCH 06/39] drm/i915: Always try to reset the GPU on takeover Chris Wilson
2019-01-02 13:19   ` Mika Kuoppala
2019-01-02 13:47     ` Chris Wilson
2019-01-02 14:09       ` Mika Kuoppala
2019-01-02  9:41 ` [PATCH 07/39] drm/i915: Report the number of closed vma held by each context in debugfs Chris Wilson
2019-01-04 13:54   ` Mika Kuoppala
2019-01-02  9:41 ` [PATCH 08/39] drm/i915: Track all held rpm wakerefs Chris Wilson
2019-01-02  9:41 ` [PATCH 09/39] drm/i915: Markup paired operations on wakerefs Chris Wilson
2019-01-03  9:38   ` Jani Nikula
2019-01-03 10:28     ` Chris Wilson
2019-01-02  9:41 ` [PATCH 10/39] drm/i915: Syntatic sugar for using intel_runtime_pm Chris Wilson
2019-01-03  9:48   ` Jani Nikula
2019-01-03 10:35     ` Chris Wilson
2019-01-02  9:41 ` [PATCH 11/39] drm/i915: Markup paired operations on display power domains Chris Wilson
2019-01-02  9:41 ` [PATCH 12/39] drm/i915: Track the wakeref used to initialise " Chris Wilson
2019-01-02  9:41 ` [PATCH 13/39] drm/i915: Combined gt.awake/gt.power wakerefs Chris Wilson
2019-01-02  9:41 ` [PATCH 14/39] drm/i915/dp: Markup pps lock power well Chris Wilson
2019-01-02  9:41 ` [PATCH 15/39] drm/i915: Complain if hsw_get_pipe_config acquires the same power well twice Chris Wilson
2019-01-02  9:41 ` [PATCH 16/39] drm/i915: Mark up Ironlake ips with rpm wakerefs Chris Wilson
2019-01-02  9:41 ` [PATCH 17/39] drm/i915: Serialise concurrent calls to i915_gem_set_wedged() Chris Wilson
2019-01-02  9:41 ` [PATCH 18/39] drm/i915: Differentiate between ggtt->mutex and ppgtt->mutex Chris Wilson
2019-01-03 13:29   ` Mika Kuoppala
2019-01-03 13:43   ` Tvrtko Ursulin
2019-01-03 13:55     ` Chris Wilson
2019-01-02  9:41 ` [PATCH 19/39] drm/i915: Pull all the reset functionality together into i915_reset.c Chris Wilson
2019-01-02  9:41 ` [PATCH 20/39] drm/i915: Make all GPU resets atomic Chris Wilson
2019-01-02  9:41 ` [PATCH 21/39] drm/i915/guc: Disable global reset Chris Wilson
2019-01-07 18:31   ` Daniele Ceraolo Spurio
2019-01-07 18:50     ` Chris Wilson
2019-01-07 21:28       ` Daniele Ceraolo Spurio
2019-01-07 21:35         ` Chris Wilson
2019-01-07 21:45           ` Daniele Ceraolo Spurio
2019-01-02  9:41 ` [PATCH 22/39] drm/i915: Remove GPU reset dependence on struct_mutex Chris Wilson
2019-01-02  9:41 ` [PATCH 23/39] drm/i915: Issue engine resets onto idle engines Chris Wilson
2019-01-02  9:41 ` [PATCH 24/39] drm/i915: Stop tracking MRU activity on VMA Chris Wilson
2019-01-02 13:13   ` Tvrtko Ursulin
2019-01-02 13:48     ` Chris Wilson
2019-01-02  9:41 ` [PATCH 25/39] drm/i915: Pull VM lists under the VM mutex Chris Wilson
2019-01-02 13:21   ` Tvrtko Ursulin
2019-01-02 13:28     ` Chris Wilson
2019-01-02  9:41 ` [PATCH 26/39] drm/i915: Consolidate the bound/unbound vma lists into one Chris Wilson
2019-01-02 14:22   ` Tvrtko Ursulin
2019-01-02  9:41 ` [PATCH 27/39] drm/i915: Move vma lookup to its own lock Chris Wilson
2019-01-02 15:07   ` Tvrtko Ursulin
2019-01-02  9:41 ` [PATCH 28/39] drm/i915: Move intel_execlists_show_requests() aside Chris Wilson
2019-01-02 15:15   ` Tvrtko Ursulin
2019-01-02  9:41 ` [PATCH 29/39] drm/i915: Use b->irq_enable() as predicate for mock engine Chris Wilson
2019-01-02 15:21   ` Tvrtko Ursulin
2019-01-04 12:13     ` Chris Wilson
2019-01-04 13:24       ` Tvrtko Ursulin
2019-01-02  9:41 ` [PATCH 30/39] drm/i915/selftests: Allocate mock ring/timeline per context Chris Wilson
2019-01-02  9:41 ` [PATCH 31/39] drm/i915/selftests: Make evict tolerant of foreign objects Chris Wilson
2019-01-02  9:41 ` [PATCH 32/39] drm/i915: Remove the intel_engine_notify tracepoint Chris Wilson
2019-01-02  9:41 ` [PATCH 33/39] drm/i915: Move list of timelines under its own lock Chris Wilson
2019-01-02  9:41 ` [PATCH 34/39] drm/i915: Introduce concept of per-timeline (context) HWSP Chris Wilson
2019-01-02  9:41 ` [PATCH 35/39] drm/i915: Enlarge vma->pin_count Chris Wilson
2019-01-02  9:41 ` [PATCH 36/39] drm/i915: Allocate a status page for each timeline Chris Wilson
2019-01-02  9:41 ` [PATCH 37/39] drm/i915: Track the context's seqno in its own timeline HWSP Chris Wilson
2019-01-03 15:08   ` Chris Wilson
2019-01-02  9:41 ` [PATCH 38/39] drm/i915: Identify active requests Chris Wilson
2019-01-02  9:41 ` [PATCH 39/39] drm/i915: Replace global breadcrumbs with per-context interrupt tracking Chris Wilson
2019-01-02 12:09 ` ✗ Fi.CI.BAT: failure for series starting with [01/39] drm: Reorder set_property_atomic to avoid returning with an active ww_ctx Patchwork

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