diff options
| author | Paul E. McKenney <paulmck@us.ibm.com> | 2006-06-27 02:54:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-27 17:32:40 -0700 |
| commit | c32e066057fe0914da262c94e52cefb142f965b4 (patch) | |
| tree | c429649e39af7925a443c72f180349a451c7acbe | |
| parent | 72e9bb549280b354311af30640c9433474f3a32c (diff) | |
| download | linux-c32e066057fe0914da262c94e52cefb142f965b4.tar.bz2 | |
[PATCH] rcutorture: add call_rcu_bh() operations
Add operations for the call_rcu_bh() variant of RCU. Also add an
rcu_batches_completed_bh() function, which is needed by rcutorture.
Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/rcupdate.h | 1 | ||||
| -rw-r--r-- | kernel/rcupdate.c | 10 | ||||
| -rw-r--r-- | kernel/rcutorture.c | 40 |
3 files changed, 49 insertions, 2 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 6312758393b6..48dfe00070c7 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -258,6 +258,7 @@ extern void rcu_init(void); extern void rcu_check_callbacks(int cpu, int user); extern void rcu_restart_cpu(int cpu); extern long rcu_batches_completed(void); +extern long rcu_batches_completed_bh(void); /* Exported interfaces */ extern void FASTCALL(call_rcu(struct rcu_head *head, diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index 20e9710fc21c..c0e1cb95dd4f 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c @@ -182,6 +182,15 @@ long rcu_batches_completed(void) return rcu_ctrlblk.completed; } +/* + * Return the number of RCU batches processed thus far. Useful + * for debug and statistics. + */ +long rcu_batches_completed_bh(void) +{ + return rcu_bh_ctrlblk.completed; +} + static void rcu_barrier_callback(struct rcu_head *notused) { if (atomic_dec_and_test(&rcu_barrier_cpu_count)) @@ -619,6 +628,7 @@ module_param(qlowmark, int, 0); module_param(rsinterval, int, 0); #endif EXPORT_SYMBOL_GPL(rcu_batches_completed); +EXPORT_SYMBOL_GPL(rcu_batches_completed_bh); EXPORT_SYMBOL_GPL(call_rcu); EXPORT_SYMBOL_GPL(call_rcu_bh); EXPORT_SYMBOL_GPL(synchronize_rcu); diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index c96b5edd6ed1..4d1c3d247127 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -66,7 +66,7 @@ MODULE_PARM_DESC(test_no_idle_hz, "Test support for tickless idle CPUs"); module_param(shuffle_interval, int, 0); MODULE_PARM_DESC(shuffle_interval, "Number of seconds between shuffles"); module_param(torture_type, charp, 0); -MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu)"); +MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu, rcu_bh)"); #define TORTURE_FLAG "-torture:" #define PRINTK_STRING(s) \ @@ -246,8 +246,44 @@ static struct rcu_torture_ops rcu_ops = { .name = "rcu" }; +/* + * Definitions for rcu_bh torture testing. + */ + +static int rcu_bh_torture_read_lock(void) +{ + rcu_read_lock_bh(); + return 0; +} + +static void rcu_bh_torture_read_unlock(int idx) +{ + rcu_read_unlock_bh(); +} + +static int rcu_bh_torture_completed(void) +{ + return rcu_batches_completed_bh(); +} + +static void rcu_bh_torture_deferred_free(struct rcu_torture *p) +{ + call_rcu_bh(&p->rtort_rcu, rcu_torture_cb); +} + +static struct rcu_torture_ops rcu_bh_ops = { + .init = NULL, + .cleanup = NULL, + .readlock = rcu_bh_torture_read_lock, + .readunlock = rcu_bh_torture_read_unlock, + .completed = rcu_bh_torture_completed, + .deferredfree = rcu_bh_torture_deferred_free, + .stats = NULL, + .name = "rcu_bh" +}; + static struct rcu_torture_ops *torture_ops[] = - { &rcu_ops, NULL }; + { &rcu_ops, &rcu_bh_ops, NULL }; /* * RCU torture writer kthread. Repeatedly substitutes a new structure |