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drm/i915: Taint the kernel on dumping the GEM ftrace buffer

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As the ftrace buffer is single shot, once dumped it will not update. As
such, it only provides information for the first bug and all subsequent
bugs are noise. The goal of CI is to have zero bugs, so taint the kernel
causing CI to reboot the machine; fix the bug and move on.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191110185806.17413-13-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-11-10 18:57:54 +00:00
parent 1af65515e3
commit 7a73e671ac
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/i915/i915_gem.h
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@ -68,9 +68,10 @@ struct drm_i915_private;
pr_err(__VA_ARGS__); \
trace_printk(__VA_ARGS__); \
} while (0)
#define GEM_TRACE_DUMP() ftrace_dump(DUMP_ALL)
#define GEM_TRACE_DUMP() \
do { ftrace_dump(DUMP_ALL); add_taint_for_CI(TAINT_WARN); } while (0)
#define GEM_TRACE_DUMP_ON(expr) \
do { if (expr) ftrace_dump(DUMP_ALL); } while (0)
do { if (expr) GEM_TRACE_DUMP(); } while (0)
#else
#define GEM_TRACE(...) do { } while (0)
#define GEM_TRACE_ERR(...) do { } while (0)