Fix ZVOL rename minor devices

[zfs.git] / module / zfs / zio.c

diff --git a/module/zfs/zio.c b/module/zfs/zio.c
index 70d3add..3c256aa 100644 (file)
--- a/module/zfs/zio.c
+++ b/module/zfs/zio.c
@@ -61,8 +61,7 @@ uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE] = {
  * ==========================================================================
  */
 char *zio_type_name[ZIO_TYPES] = {
-       "zio_null", "zio_read", "zio_write", "zio_free", "zio_claim",
-       "zio_ioctl"
+       "z_null", "z_rd", "z_wr", "z_fr", "z_cl", "z_ioctl"
 };
 
 /*
@@ -75,6 +74,7 @@ kmem_cache_t *zio_link_cache;
 kmem_cache_t *zio_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
 kmem_cache_t *zio_data_buf_cache[SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT];
 int zio_bulk_flags = 0;
+int zio_delay_max = ZIO_DELAY_MAX;
 
 #ifdef _KERNEL
 extern vmem_t *zio_alloc_arena;
@@ -2754,6 +2754,17 @@ zio_done(zio_t *zio)
 
        vdev_stat_update(zio, zio->io_size);
 
+       /*
+        * If this I/O is attached to a particular vdev is slow, exeeding
+        * 30 seconds to complete, post an error described the I/O delay.
+        * We ignore these errors if the device is currently unavailable.
+        */
+       if (zio->io_delay >= zio_delay_max) {
+               if (zio->io_vd != NULL && !vdev_is_dead(zio->io_vd))
+                       zfs_ereport_post(FM_EREPORT_ZFS_DELAY, zio->io_spa,
+                                         zio->io_vd, zio, 0, 0);
+       }
+
        if (zio->io_error) {
                /*
                 * If this I/O is attached to a particular vdev,
@@ -2993,4 +3004,7 @@ EXPORT_SYMBOL(zio_type_name);
 
 module_param(zio_bulk_flags, int, 0644);
 MODULE_PARM_DESC(zio_bulk_flags, "Additional flags to pass to bulk buffers");
+
+module_param(zio_delay_max, int, 0644);
+MODULE_PARM_DESC(zio_delay_max, "Max zio delay before posting an event (ms)");
 #endif