1 files changed, 4 insertions, 0 deletions
diff --git a/sys/kern/uipc_shm.c b/sys/kern/uipc_shm.c
index cf7212f24e26..0154a4076182 100644
--- a/sys/kern/uipc_shm.c
+++ b/sys/kern/uipc_shm.c
@@ -287,6 +287,10 @@ shm_dotruncate(struct shmfd *shmfd, off_t length)
 			if (m->dirty != 0)
 				m->dirty = VM_PAGE_BITS_ALL;
 			vm_page_unlock_queues();
+		} else if ((length & PAGE_MASK) &&
+		    __predict_false(object->cache != NULL)) {
+			vm_page_cache_free(object, OFF_TO_IDX(length),
+			    nobjsize);
 		}
 	}
 	shmfd->shm_size = length;