From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Maarten Lankhorst <dev@lankhorst.se>
Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v4 0/7] drm/i915: All fixes to make i915 work well with PREEMPT_RT.
Date: Mon, 6 Jul 2026 14:20:26 +0200 [thread overview]
Message-ID: <20260706122026.IJAiyhhw@linutronix.de> (raw)
In-Reply-To: <20260706114823.752313-1-dev@lankhorst.se>
On 2026-07-06 13:48:16 [+0200], Maarten Lankhorst wrote:
> All fixes to make the core i915 module (without display) working correctly on
> PREEMPT_RT.
>
> Some fixes are still needed, as the selftests still fail. But otherwise the
> test results were looking good on PREEMPT_RT.
>
> It looks like the patch that added a spinlock caused a regression on !PREEMPT_RT,
> and may even have caused similar test failures on PREEMPT_RT, so to fix it
> I removed RCU entirely, and converted to a locked implementation instead.
>
> This time at least, i915 live selftests pass on !PREEMPRT_RT for at least 1 machine
> with same config as CI.
I saw the version counter overflowed and is at 4 here. I appreciate all
the work. May I ask how are things?
Sebastian
next prev parent reply other threads:[~2026-07-06 12:20 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-06 11:48 [PATCH v4 0/7] drm/i915: All fixes to make i915 work well with PREEMPT_RT Maarten Lankhorst
2026-07-06 11:48 ` [PATCH v4 1/7] drm/i915/gt: Use spin_lock_irq() instead of local_irq_disable() + spin_lock() Maarten Lankhorst
2026-07-06 12:03 ` sashiko-bot
2026-07-06 11:48 ` [PATCH v4 2/7] drm/i915: Drop the irqs_disabled() check Maarten Lankhorst
2026-07-06 11:48 ` [PATCH v4 3/7] drm/i915/guc: Consider also RCU depth in busy loop Maarten Lankhorst
2026-07-06 12:02 ` sashiko-bot
2026-07-06 11:48 ` [PATCH v4 4/7] drm/i915/gt: Fix selftests on PREEMPT_RT Maarten Lankhorst
2026-07-06 11:56 ` sashiko-bot
2026-07-06 11:48 ` [PATCH v4 5/7] drm/i915/gt: Set stop_timeout() correctly on PREEMPT-RT Maarten Lankhorst
2026-07-06 11:48 ` [PATCH v4 6/7] drm/i915: Use sleeping selftests for igt_atomic on PREEMPT_RT Maarten Lankhorst
2026-07-06 11:48 ` [PATCH v4 7/7] drm/i915/gt: Use signalers_lock to prevent starvation of irq_work Maarten Lankhorst
2026-07-06 12:04 ` sashiko-bot
2026-07-06 12:20 ` Sebastian Andrzej Siewior [this message]
2026-07-06 12:51 ` [PATCH v4 0/7] drm/i915: All fixes to make i915 work well with PREEMPT_RT Maarten Lankhorst
2026-07-06 14:49 ` ✗ i915.CI.BAT: failure for drm/i915: All fixes to make i915 work well with PREEMPT_RT. (rev4) Patchwork
2026-07-07 2:39 ` ✓ i915.CI.BAT: success for drm/i915: All fixes to make i915 work well with PREEMPT_RT. (rev5) Patchwork
2026-07-07 9:58 ` ✗ i915.CI.Full: failure " Patchwork
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