From 7186010504c242c90caeec06136d8ebd7b47bada Mon Sep 17 00:00:00 2001
From: Arthur Hanson Rasmusson <arthur@vgpu.io>
Date: Thu, 24 Sep 2026 03:29:40 -0400
Subject: tools/guest-diag: add UVM wait diagnostics, tracker poke and VA->PA
 map injector

---
 tools/guest-diag/uvmwait.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 tools/guest-diag/uvmwait.sh

(limited to 'tools/guest-diag/uvmwait.sh')

diff --git a/tools/guest-diag/uvmwait.sh b/tools/guest-diag/uvmwait.sh
new file mode 100644
index 0000000..06b2dc7
--- /dev/null
+++ b/tools/guest-diag/uvmwait.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+# uvmwait.sh - guest-side: run cdt with UVM debug prints on, and snapshot the
+# UVM tracker-wait messages early (before any teardown floods dmesg).
+nvidia-modprobe -c 0
+nvidia-modprobe -u
+modprobe nvidia-uvm
+echo 1 > /sys/module/nvidia_uvm/parameters/uvm_debug_prints 2>/dev/null
+dmesg -C
+rm -f /tmp/cdt.out
+setsid /tmp/cdt > /tmp/cdt.out 2>&1 &
+sleep 55
+dmesg | grep -aiE "tracker|semaphore|releasing|channel|page table" > /tmp/uvmwait.txt
+tail -1 /tmp/cdt.out > /tmp/cdttail.txt
+echo DONE > /tmp/uvmwait.done
-- 
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