Commit 11a14701 authored by Josh Triplett's avatar Josh Triplett Committed by Linus Torvalds
Browse files

[PATCH] rcu: add rcu_bh_sync torture type to rcutorture 



Use the newly-generic synchronous deferred free function to implement torture
testing for rcu_bh using synchronize_rcu_bh rather than the asynchronous
call_rcu_bh.

Signed-off-by: default avatarJosh Triplett <josh@freedesktop.org>
Acked-by: default avatarPaul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 20d2e428

Documentation/RCU/torture.txt

+3 −2
Original line number Diff line number Diff line
@@ -55,8 +55,9 @@ test_no_idle_hz Whether or not to test the ability of RCU to operate in 


torture_type	The type of RCU to test: "rcu" for the rcu_read_lock() API,

		"rcu_sync" for rcu_read_lock() with synchronous reclamation,

		"rcu_bh" for the rcu_read_lock_bh() API, and "srcu" for the

		"srcu_read_lock()" API.

		"rcu_bh" for the rcu_read_lock_bh() API, "rcu_bh_sync" for

		rcu_read_lock_bh() with synchronous reclamation, and "srcu"

		for the "srcu_read_lock()" API.



verbose		Enable debug printk()s.  Default is disabled.

kernel/rcutorture.c

+15 −1
Original line number Diff line number Diff line
@@ -370,6 +370,19 @@ static struct rcu_torture_ops rcu_bh_ops = { 
	.name = "rcu_bh"

};



static struct rcu_torture_ops rcu_bh_sync_ops = {

	.init = rcu_sync_torture_init,

	.cleanup = NULL,

	.readlock = rcu_bh_torture_read_lock,

	.readdelay = rcu_read_delay,  /* just reuse rcu's version. */

	.readunlock = rcu_bh_torture_read_unlock,

	.completed = rcu_bh_torture_completed,

	.deferredfree = rcu_sync_torture_deferred_free,

	.sync = rcu_bh_torture_synchronize,

	.stats = NULL,

	.name = "rcu_bh_sync"

};



/*

 * Definitions for srcu torture testing.

 */
@@ -452,7 +465,8 @@ static struct rcu_torture_ops srcu_ops = { 
};



static struct rcu_torture_ops *torture_ops[] =

	{ &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &srcu_ops, NULL };

	{ &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops, &srcu_ops,

	  NULL };



/*

 * RCU torture writer kthread.  Repeatedly substitutes a new structure

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