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Commit 0c8e0e3c authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

srcu: Print non-default exp_holdoff values at boot time 



This commit makes srcu_bootup_announce() check for non-default values
of the auto-expedite holdoff time exp_holdoff and print a message if so.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent b5815e6c

kernel/rcu/srcutree.c

+5 −1
Original line number Diff line number Diff line
@@ -40,7 +40,9 @@ 
#include "rcu.h"

#include "rcu_segcblist.h"



static ulong exp_holdoff = 25 * 1000; /* Holdoff (ns) for auto-expediting. */

/* Holdoff in nanoseconds for auto-expediting. */

#define DEFAULT_SRCU_EXP_HOLDOFF (25 * 1000)

static ulong exp_holdoff = DEFAULT_SRCU_EXP_HOLDOFF;

module_param(exp_holdoff, ulong, 0444);



static void srcu_invoke_callbacks(struct work_struct *work);
@@ -1171,6 +1173,8 @@ EXPORT_SYMBOL_GPL(srcutorture_get_gp_data); 
static int __init srcu_bootup_announce(void)

{

	pr_info("Hierarchical SRCU implementation.\n");

	if (exp_holdoff != DEFAULT_SRCU_EXP_HOLDOFF)

		pr_info("\tNon-default auto-expedite holdoff of %lu ns.\n", exp_holdoff);

	return 0;

}

early_initcall(srcu_bootup_announce);