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Commit dac95906 authored by Paul E. McKenney's avatar Paul E. McKenney
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torture: Suppress CPU stall warnings during shutdown ftrace dump 



The torture_shutdown() function directly invokes ftrace_dump(), which
can result in RCU CPU stall warnings when the ftrace buffer is large,
which it usually is.  This commit therefore invoks rcu_ftrace_dump()
in place of ftrace_dump(), suppressing RCU CPU stall warnings during
this time.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 4fbd8d19

kernel/torture.c

+2 −1
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ 
#include <linux/ktime.h>

#include <asm/byteorder.h>

#include <linux/torture.h>

#include "rcu/rcu.h"



MODULE_LICENSE("GPL");

MODULE_AUTHOR("Paul E. McKenney <paulmck@us.ibm.com>");
@@ -500,7 +501,7 @@ static int torture_shutdown(void *arg) 
		torture_shutdown_hook();

	else

		VERBOSE_TOROUT_STRING("No torture_shutdown_hook(), skipping.");

	ftrace_dump(DUMP_ALL);

	rcu_ftrace_dump(DUMP_ALL);

	kernel_power_off();	/* Shut down the system. */

	return 0;

}