[ARCHIVE DEBUG 10/13] audit_debug: bark on impossible reserve process conditions in while loop

[Richard Guy Briggs]

Debug the expected impossibility of the audit_backlog_queue reserve
being used up.

Signed-off-by: Richard Guy Briggs <rgb at redhat.com>
---
 kernel/audit.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index d6f4763..9e9c02b 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1527,6 +1527,12 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
 			atomic_inc(&audit_overflows);
 			overflow_counted = 1;
 		}
+		if (reserve) {
+			pr_warn("( %lu %lu )"
+				"  Qstuck apid=%d pid=%d comm=%s type=%d reserve=%d Qlen=%d\n",
+				timeout_start, jiffies-timeout_start,
+				audit_pid, current->pid, current->comm, type, reserve, skb_queue_len(&audit_skb_queue));
+		}
 		if (gfp_mask & __GFP_WAIT && audit_backlog_wait_time) {
 			long sleep_time;
 
@@ -1534,6 +1540,12 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
 				atomic_inc(&audit_waiters);
 				waiter = 1;
 			}
+			if (reserve) {
+				pr_warn("( %lu %lu )"
+					"   Qreallystuck apid=%d pid=%d comm=%s type=%d reserve=%d Qlen=%d\n",
+					timeout_start, jiffies-timeout_start,
+					audit_pid, current->pid, current->comm, type, reserve, skb_queue_len(&audit_skb_queue));
+			}
 			sleep_time = timeout_start + audit_backlog_wait_time - jiffies;
 			if (sleep_time > 0) {
 				sleep_time = wait_for_auditd(sleep_time);
-- 
1.7.1