LU-14277 lod: statfs should not block a create

[fs/lustre-release.git] / lustre / lod / lod_qos.c

diff --git a/lustre/lod/lod_qos.c b/lustre/lod/lod_qos.c
index f6571f3..4a46796 100644 (file)
--- a/lustre/lod/lod_qos.c
+++ b/lustre/lod/lod_qos.c
@@ -210,11 +210,15 @@ void lod_qos_statfs_update(const struct lu_env *env, struct lod_device *lod,
                /* statfs data are quite recent, don't need to refresh it */
                RETURN_EXIT;
 
-       down_write(&ltd->ltd_qos.lq_rw_sem);
-
-       if (obd->obd_osfs_age > max_age)
-               goto out;
+       if (test_and_set_bit(LQ_SF_PROGRESS, &ltd->ltd_qos.lq_flags))
+               RETURN_EXIT;
 
+       if (obd->obd_osfs_age > max_age) {
+               /* statfs data are quite recent, don't need to refresh it */
+               clear_bit(LQ_SF_PROGRESS, &ltd->ltd_qos.lq_flags);
+               RETURN_EXIT;
+       }
+       lod_getref(ltd);
        ltd_foreach_tgt(ltd, tgt) {
                avail = tgt->ltd_statfs.os_bavail;
                if (lod_statfs_and_check(env, lod, ltd, tgt, 0))
@@ -224,10 +228,10 @@ void lod_qos_statfs_update(const struct lu_env *env, struct lod_device *lod,
                        /* recalculate weigths */
                        set_bit(LQ_DIRTY, &ltd->ltd_qos.lq_flags);
        }
+       lod_putref(lod, ltd);
        obd->obd_osfs_age = ktime_get_seconds();
 
-out:
-       up_write(&ltd->ltd_qos.lq_rw_sem);
+       clear_bit(LQ_SF_PROGRESS, &ltd->ltd_qos.lq_flags);
        EXIT;
 }