kernel write

write_test.c

diff --git a/module/zfs/zfs_vnops_osx.c b/module/zfs/zfs_vnops_osx.c
index be23696..410ed8d 100644
--- a/module/zfs/zfs_vnops_osx.c
+++ b/module/zfs/zfs_vnops_osx.c
@@ -193,6 +193,48 @@ dprintf("%s ENOTSUP\n", __func__);
        return (ENOTSUP);
 }

+
+
+void write_test(void)
+{
+       int err;
+       char *buf;
+       struct vnode *vp = NULL;
+       int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX;
+
+       buf = kmem_alloc(131072, KM_SLEEP);
+       for (int i = 0; i < 131072; i++)
+               buf[i] = i;
+
+       uint64_t start = ddi_get_lbolt64();
+
+       printf("write_test start %llu\n", start);
+
+       err = vn_open("/Volumes/BOOM/speedtest", UIO_SYSSPACE,
+               oflags,
+               0644,
+               &vp,
+               CRCREAT,
+               0);
+       printf("vn_open(): %d\n", err);
+       if (err == 0) {
+               uint64_t offset = 0;
+               for (int i = 0; i < 4096; i++) {
+                       err = vn_rdwr(UIO_WRITE, vp, buf, 131072, offset, UIO_SYSSPACE,
+                               0, RLIM64_INFINITY, kcred, NULL);
+                       if (err) printf("vn_rdwr: %d\n", err);
+                       offset += 131072;
+               }
+               (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL);
+       }
+       printf("write_test done %llu\n", ddi_get_lbolt64());
+       printf("write_test delta %llu\n",
+               ddi_get_lbolt64() - start);
+       kmem_free(buf, 131072);
+}
+
+
+
 static kmutex_t                zfs_findernotify_lock;
 static kcondvar_t      zfs_findernotify_thread_cv;
 static boolean_t       zfs_findernotify_thread_exit;
 
 @@ -321,6 +363,10 @@ zfs_findernotify_thread(void *notused)
                if (!zfs_findernotify_thread_exit)
                        vfs_iterate(LK_NOWAIT, zfs_findernotify_callback, NULL);
+               if (debug_vnop_osx_printf == 1234) {
+                       debug_vnop_osx_printf = 0;
+                       write_test();
+               }
        }

        zfs_findernotify_thread_exit = FALSE;