MFC r268384:

When the lock was stolen from us, retry the whole lock sequence in kernel,
instead of returning EINTR.

1 files changed, 9 insertions, 1 deletions

diff --git a/sys/kern/kern_lockf.c b/sys/kern/kern_lockf.c
index 6d6dc51..8d5c576 100644
--- a/sys/kern/kern_lockf.c
+++ b/sys/kern/kern_lockf.c
@@ -469,6 +469,9 @@ lf_advlockasync(struct vop_advlockasync_args *ap, struct lockf **statep,
 			return (EOVERFLOW);
 		end = start + oadd;
 	}
+
+retry_setlock:
+
 	/*
 	 * Avoid the common case of unlocking when inode has no locks.
 	 */
@@ -744,6 +747,11 @@ lf_advlockasync(struct vop_advlockasync_args *ap, struct lockf **statep,
 		sx_destroy(&freestate->ls_lock);
 		free(freestate, M_LOCKF);
 	}
+
+	if (error == EDOOFUS) {
+		KASSERT(ap->a_op == F_SETLK, ("EDOOFUS"));
+		goto retry_setlock;
+	}
 	return (error);
 }
 
@@ -1459,7 +1467,7 @@ lf_setlock(struct lockf *state, struct lockf_entry *lock, struct vnode *vp,
 		lock->lf_refs++;
 		error = sx_sleep(lock, &state->ls_lock, priority, lockstr, 0);
 		if (lf_free_lock(lock)) {
-			error = EINTR;
+			error = EDOOFUS;
 			goto out;
 		}