diff options
Diffstat (limited to 'module/zfs/zio.c')
| -rw-r--r-- | module/zfs/zio.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/module/zfs/zio.c b/module/zfs/zio.c index 70d3addf5..9f34a2338 100644 --- a/module/zfs/zio.c +++ b/module/zfs/zio.c @@ -75,6 +75,7 @@ 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 +2755,17 @@ 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 +3005,7 @@ 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 |