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authorMarkus Metzger <markus.t.metzger@intel.com>2009-01-19 10:31:01 +0100
committerIngo Molnar <mingo@elte.hu>2009-01-20 13:03:48 +0100
commitb1818748b0cf9427e48acf9713295e829a0d715f (patch)
tree49e8f8dc4328799fa69eae635f4b69ee97228445 /arch/x86/kernel/dumpstack.c
parent5c5317de147e9b38ea9c4cbdc2d15bed7648d036 (diff)
downloadop-kernel-dev-b1818748b0cf9427e48acf9713295e829a0d715f.zip
op-kernel-dev-b1818748b0cf9427e48acf9713295e829a0d715f.tar.gz
x86, ftrace, hw-branch-tracer: dump trace on oops
Dump the branch trace on an oops (based on ftrace_dump_on_oops). Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/dumpstack.c')
-rw-r--r--arch/x86/kernel/dumpstack.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 6b1f6f6..077c9ea 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -14,6 +14,7 @@
#include <linux/bug.h>
#include <linux/nmi.h>
#include <linux/sysfs.h>
+#include <linux/ftrace.h>
#include <asm/stacktrace.h>
@@ -195,6 +196,11 @@ unsigned __kprobes long oops_begin(void)
int cpu;
unsigned long flags;
+ /* notify the hw-branch tracer so it may disable tracing and
+ add the last trace to the trace buffer -
+ the earlier this happens, the more useful the trace. */
+ trace_hw_branch_oops();
+
oops_enter();
/* racy, but better than risking deadlock. */
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