[Bug 89334] 4.0-rc1 kernel GPU hang: ecode 3:0:0x02faffcf (i915) stuck on render ring ecode 3:0:0x02faffcf

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89334

--- Comment #23 from Chris Wilson <chris at chris-wilson.co.uk> ---
One final ddx change just to check a potential root cause of the problem:

diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index a5571aa..adf52d6 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -83,7 +83,7 @@ search_snoop_cache(struct kgem *kgem, unsigned int num_pages,
unsigned flags);
 #define DBG_NO_FAST_RELOC 0
 #define DBG_NO_HANDLE_LUT 0
 #define DBG_NO_WT 0
-#define DBG_NO_WC_MMAP 0
+#define DBG_NO_WC_MMAP 1
 #define DBG_DUMP 0
 #define DBG_NO_MALLOC_CACHE 0

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