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rcu: make rcutorture version numbers available through debugfs

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It is not possible to accurately correlate rcutorture output with that
of debugfs.  This patch therefore adds a debugfs file that prints out
the rcutorture version number, permitting easy correlation.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Paul E. McKenney
2011-04-03 21:33:51 -07:00
committed by Paul E. McKenney
parent d71df90ead
commit 4a29865689
5 changed files with 85 additions and 4 deletions
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8
kernel/rcutorture.c
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@@ -131,7 +131,7 @@ struct rcu_torture {
static LIST_HEAD(rcu_torture_freelist);
static struct rcu_torture __rcu *rcu_torture_current;
static long rcu_torture_current_version;
static unsigned long rcu_torture_current_version;
static struct rcu_torture rcu_tortures[10 * RCU_TORTURE_PIPE_LEN];
static DEFINE_SPINLOCK(rcu_torture_lock);
static DEFINE_PER_CPU(long [RCU_TORTURE_PIPE_LEN + 1], rcu_torture_count) =
@@ -884,7 +884,7 @@ rcu_torture_writer(void *arg)
old_rp->rtort_pipe_count++;
cur_ops->deferred_free(old_rp);
}
rcu_torture_current_version++;
rcutorture_record_progress(++rcu_torture_current_version);
oldbatch = cur_ops->completed();
rcu_stutter_wait("rcu_torture_writer");
} while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
@@ -1064,7 +1064,7 @@ rcu_torture_printk(char *page)
}
cnt += sprintf(&page[cnt], "%s%s ", torture_type, TORTURE_FLAG);
cnt += sprintf(&page[cnt],
"rtc: %p ver: %ld tfle: %d rta: %d rtaf: %d rtf: %d "
"rtc: %p ver: %lu tfle: %d rta: %d rtaf: %d rtf: %d "
"rtmbe: %d rtbke: %ld rtbre: %ld "
"rtbf: %ld rtb: %ld nt: %ld",
rcu_torture_current,
@@ -1325,6 +1325,7 @@ rcu_torture_cleanup(void)
int i;
mutex_lock(&fullstop_mutex);
rcutorture_record_test_transition();
if (fullstop == FULLSTOP_SHUTDOWN) {
printk(KERN_WARNING /* but going down anyway, so... */
"Concurrent 'rmmod rcutorture' and shutdown illegal!\n");
@@ -1616,6 +1617,7 @@ rcu_torture_init(void)
}
}
register_reboot_notifier(&rcutorture_shutdown_nb);
rcutorture_record_test_transition();
mutex_unlock(&fullstop_mutex);
return 0;