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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-03-07 14:15:28 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-05-14 09:46:07 -0700
commit945fa9c631b04febe295a3a2a00c7e4a3cfb97db (patch)
tree3817be3d2913840ee8ef9b1143ca72c6dd67430b
parent499c632dce47e95280f8b99540c5db294053c94c (diff)
downloadop-kernel-dev-945fa9c631b04febe295a3a2a00c7e4a3cfb97db.zip
op-kernel-dev-945fa9c631b04febe295a3a2a00c7e4a3cfb97db.tar.gz
torture: Dump ftrace buffer when the RCU grace period stalls
This commit adds a call to rcutorture_trace_dump() to dump the ftrace buffer when the RCU grace period stalls in order to help debug the stall. Note that this is different than the RCU CPU stall warning, as it is rcutorture detecting the stall rather than the underlying RCU implementation. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
-rw-r--r--kernel/rcu/rcutorture.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 80d2d24..9decce0 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1034,6 +1034,7 @@ rcu_torture_printk(char *page)
"??? Writer stall state %d g%lu c%lu f%#x\n",
rcu_torture_writer_state,
gpnum, completed, flags);
+ rcutorture_trace_dump();
}
rtcv_snap = rcu_torture_current_version;
}
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