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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:38 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:38 +0000 |
| commit | 08b74a000942a380fe028845f92cd3a0dee827d5 (patch) | |
| tree | aa78b4e12607c3e1fcce8d5cc42df4330792f118 /debian/patches-rt/0253-drm-i915-disable-tracing-on-RT.patch | |
| parent | Adding upstream version 4.19.249. (diff) | |
| download | linux-debian.tar.xz linux-debian.zip | |
Adding debian version 4.19.249-2.debian/4.19.249-2debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0253-drm-i915-disable-tracing-on-RT.patch')
| -rw-r--r-- | debian/patches-rt/0253-drm-i915-disable-tracing-on-RT.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/debian/patches-rt/0253-drm-i915-disable-tracing-on-RT.patch b/debian/patches-rt/0253-drm-i915-disable-tracing-on-RT.patch new file mode 100644 index 000000000..78662975e --- /dev/null +++ b/debian/patches-rt/0253-drm-i915-disable-tracing-on-RT.patch @@ -0,0 +1,47 @@ +From 5e32c1ba695c3d32da799c26e267183a4516ffb8 Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Thu, 6 Dec 2018 09:52:20 +0100 +Subject: [PATCH 253/347] drm/i915: disable tracing on -RT +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +Luca Abeni reported this: +| BUG: scheduling while atomic: kworker/u8:2/15203/0x00000003 +| CPU: 1 PID: 15203 Comm: kworker/u8:2 Not tainted 4.19.1-rt3 #10 +| Call Trace: +| rt_spin_lock+0x3f/0x50 +| gen6_read32+0x45/0x1d0 [i915] +| g4x_get_vblank_counter+0x36/0x40 [i915] +| trace_event_raw_event_i915_pipe_update_start+0x7d/0xf0 [i915] + +The tracing events use trace_i915_pipe_update_start() among other events +use functions acquire spin locks. A few trace points use +intel_get_crtc_scanline(), others use ->get_vblank_counter() wich also +might acquire a sleeping lock. + +Based on this I don't see any other way than disable trace points on RT. + +Cc: stable-rt@vger.kernel.org +Reported-by: Luca Abeni <lucabe72@gmail.com> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + drivers/gpu/drm/i915/i915_trace.h | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h +index b50c6b829715..cc54ec0ef75c 100644 +--- a/drivers/gpu/drm/i915/i915_trace.h ++++ b/drivers/gpu/drm/i915/i915_trace.h +@@ -2,6 +2,10 @@ + #if !defined(_I915_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ) + #define _I915_TRACE_H_ + ++#ifdef CONFIG_PREEMPT_RT_BASE ++#define NOTRACE ++#endif ++ + #include <linux/stringify.h> + #include <linux/types.h> + #include <linux/tracepoint.h> +-- +2.36.1 + |