diff options
Diffstat (limited to 'module/zfs/zio.c')
| -rw-r--r-- | module/zfs/zio.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/module/zfs/zio.c b/module/zfs/zio.c index 88d80af4e..1ba2330bd 100644 --- a/module/zfs/zio.c +++ b/module/zfs/zio.c @@ -2247,6 +2247,26 @@ zio_vdev_io_start(zio_t *zio) return (vdev_mirror_ops.vdev_op_io_start(zio)); } + /* + * We keep track of time-sensitive I/Os so that the scan thread + * can quickly react to certain workloads. In particular, we care + * about non-scrubbing, top-level reads and writes with the following + * characteristics: + * - synchronous writes of user data to non-slog devices + * - any reads of user data + * When these conditions are met, adjust the timestamp of spa_last_io + * which allows the scan thread to adjust its workload accordingly. + */ + if (!(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && zio->io_bp != NULL && + vd == vd->vdev_top && !vd->vdev_islog && + zio->io_bookmark.zb_objset != DMU_META_OBJSET && + zio->io_txg != spa_syncing_txg(spa)) { + uint64_t old = spa->spa_last_io; + uint64_t new = ddi_get_lbolt64(); + if (old != new) + (void) atomic_cas_64(&spa->spa_last_io, old, new); + } + align = 1ULL << vd->vdev_top->vdev_ashift; if (P2PHASE(zio->io_size, align) != 0) { @@ -2262,7 +2282,7 @@ zio_vdev_io_start(zio_t *zio) ASSERT(P2PHASE(zio->io_offset, align) == 0); ASSERT(P2PHASE(zio->io_size, align) == 0); - ASSERT(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa)); + VERIFY(zio->io_type != ZIO_TYPE_WRITE || spa_writeable(spa)); /* * If this is a repair I/O, and there's no self-healing involved -- @@ -2744,6 +2764,7 @@ zio_done(zio_t *zio) if ((zio->io_type == ZIO_TYPE_READ || zio->io_type == ZIO_TYPE_FREE) && + !(zio->io_flags & ZIO_FLAG_SCAN_THREAD) && zio->io_error == ENXIO && spa_load_state(spa) == SPA_LOAD_NONE && spa_get_failmode(spa) != ZIO_FAILURE_MODE_CONTINUE) |