From: Chris Wilson Date: Sun, 10 Nov 2019 18:57:54 +0000 (+0000) Subject: drm/i915: Taint the kernel on dumping the GEM ftrace buffer X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7a73e671acbaf00ad6aa4ee0e3f39e3c9a9ef563;p=linux.git drm/i915: Taint the kernel on dumping the GEM ftrace buffer 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 Cc: Mika Kuoppala Cc: Tvrtko Ursulin Reviewed-by: Joonas Lahtinen Link: https://patchwork.freedesktop.org/patch/msgid/20191110185806.17413-13-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h index f6f9675848b8e..36a8c7673c4f8 100644 --- a/drivers/gpu/drm/i915/i915_gem.h +++ b/drivers/gpu/drm/i915/i915_gem.h @@ -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)