dlm: change lock time stamping

Use ktime instead of jiffies for timestamping lkb's.  Also stamp the
time on every lkb whenever it's added to a resource queue, instead of
just stamping locks subject to timeouts.  This will allow us to use
timestamps more widely for debugging all locks.

Signed-off-by: David Teigland <teigland@redhat.com>

1 files changed, 11 insertions, 10 deletions

diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 7b758dadbdd6..dfc57ae27045 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -742,6 +742,8 @@ static void add_lkb(struct dlm_rsb *r, struct dlm_lkb *lkb, int status)
 
         DLM_ASSERT(!lkb->lkb_status, dlm_print_lkb(lkb););
 
+        lkb->lkb_timestamp = ktime_get();
+
         lkb->lkb_status = status;
 
         switch (status) {
@@ -1011,10 +1013,8 @@ static void add_timeout(struct dlm_lkb *lkb)
 {
         struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 
-        if (is_master_copy(lkb)) {
-                lkb->lkb_timestamp = jiffies;
+        if (is_master_copy(lkb))
                 return;
-        }
 
         if (test_bit(LSFL_TIMEWARN, &ls->ls_flags) &&
             !(lkb->lkb_exflags & DLM_LKF_NODLCKWT)) {
@@ -1029,7 +1029,6 @@ static void add_timeout(struct dlm_lkb *lkb)
         DLM_ASSERT(list_empty(&lkb->lkb_time_list), dlm_print_lkb(lkb););
         mutex_lock(&ls->ls_timeout_mutex);
         hold_lkb(lkb);
-        lkb->lkb_timestamp = jiffies;
         list_add_tail(&lkb->lkb_time_list, &ls->ls_timeout);
         mutex_unlock(&ls->ls_timeout_mutex);
 }
@@ -1057,6 +1056,7 @@ void dlm_scan_timeout(struct dlm_ls *ls)
         struct dlm_rsb *r;
         struct dlm_lkb *lkb;
         int do_cancel, do_warn;
+        s64 wait_us;
 
         for (;;) {
                 if (dlm_locking_stopped(ls))
@@ -1067,14 +1067,15 @@ void dlm_scan_timeout(struct dlm_ls *ls)
                 mutex_lock(&ls->ls_timeout_mutex);
                 list_for_each_entry(lkb, &ls->ls_timeout, lkb_time_list) {
 
+                        wait_us = ktime_to_us(ktime_sub(ktime_get(),
+                                                        lkb->lkb_timestamp));
+
                         if ((lkb->lkb_exflags & DLM_LKF_TIMEOUT) &&
-                            time_after_eq(jiffies, lkb->lkb_timestamp +
-                                          lkb->lkb_timeout_cs * HZ/100))
+                            wait_us >= (lkb->lkb_timeout_cs * 10000))
                                 do_cancel = 1;
 
                         if ((lkb->lkb_flags & DLM_IFL_WATCH_TIMEWARN) &&
-                            time_after_eq(jiffies, lkb->lkb_timestamp +
-                                           dlm_config.ci_timewarn_cs * HZ/100))
+                            wait_us >= dlm_config.ci_timewarn_cs * 10000)
                                 do_warn = 1;
 
                         if (!do_cancel && !do_warn)
@@ -1120,12 +1121,12 @@ void dlm_scan_timeout(struct dlm_ls *ls)
 void dlm_adjust_timeouts(struct dlm_ls *ls)
 {
         struct dlm_lkb *lkb;
-        long adj = jiffies - ls->ls_recover_begin;
+        u64 adj_us = jiffies_to_usecs(jiffies - ls->ls_recover_begin);
 
         ls->ls_recover_begin = 0;
         mutex_lock(&ls->ls_timeout_mutex);
         list_for_each_entry(lkb, &ls->ls_timeout, lkb_time_list)
-                lkb->lkb_timestamp += adj;
+                lkb->lkb_timestamp = ktime_add_us(lkb->lkb_timestamp, adj_us);
         mutex_unlock(&ls->ls_timeout_mutex);
 }