diff options
Diffstat (limited to 'module/zfs')
-rw-r--r-- | module/zfs/metaslab.c | 5 | ||||
-rw-r--r-- | module/zfs/spa.c | 2 | ||||
-rw-r--r-- | module/zfs/spa_misc.c | 2 | ||||
-rw-r--r-- | module/zfs/space_map.c | 42 | ||||
-rw-r--r-- | module/zfs/zio.c | 22 |
5 files changed, 59 insertions, 14 deletions
diff --git a/module/zfs/metaslab.c b/module/zfs/metaslab.c index 03d5a1d9c..76dc4f637 100644 --- a/module/zfs/metaslab.c +++ b/module/zfs/metaslab.c @@ -899,8 +899,9 @@ metaslab_activate(metaslab_t *msp, uint64_t activation_weight) if ((msp->ms_weight & METASLAB_ACTIVE_MASK) == 0) { space_map_load_wait(sm); if (!sm->sm_loaded) { - int error = space_map_load(sm, sm_ops, SM_FREE, - &msp->ms_smo, + space_map_obj_t *smo = &msp->ms_smo; + + int error = space_map_load(sm, sm_ops, SM_FREE, smo, spa_meta_objset(msp->ms_group->mg_vd->vdev_spa)); if (error) { metaslab_group_sort(msp->ms_group, msp, 0); diff --git a/module/zfs/spa.c b/module/zfs/spa.c index 12c24879b..22fa7878c 100644 --- a/module/zfs/spa.c +++ b/module/zfs/spa.c @@ -6078,7 +6078,7 @@ spa_sync(spa_t *spa, uint64_t txg) spa_errlog_sync(spa, txg); dsl_pool_sync(dp, txg); - if (pass <= SYNC_PASS_DEFERRED_FREE) { + if (pass < zfs_sync_pass_deferred_free) { zio_t *zio = zio_root(spa, NULL, NULL, 0); bplist_iterate(free_bpl, spa_free_sync_cb, zio, tx); diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c index 476f9c02c..0ca9f3a7a 100644 --- a/module/zfs/spa_misc.c +++ b/module/zfs/spa_misc.c @@ -1633,6 +1633,7 @@ spa_init(int mode) fm_init(); refcount_init(); unique_init(); + space_map_init(); zio_init(); dmu_init(); zil_init(); @@ -1655,6 +1656,7 @@ spa_fini(void) zil_fini(); dmu_fini(); zio_fini(); + space_map_fini(); unique_fini(); refcount_fini(); fm_fini(); diff --git a/module/zfs/space_map.c b/module/zfs/space_map.c index 9c0cdb6be..d99c7c0b3 100644 --- a/module/zfs/space_map.c +++ b/module/zfs/space_map.c @@ -29,6 +29,23 @@ #include <sys/zio.h> #include <sys/space_map.h> +static kmem_cache_t *space_seg_cache; + +void +space_map_init(void) +{ + ASSERT(space_seg_cache == NULL); + space_seg_cache = kmem_cache_create("space_seg_cache", + sizeof (space_seg_t), 0, NULL, NULL, NULL, NULL, NULL, 0); +} + +void +space_map_fini(void) +{ + kmem_cache_destroy(space_seg_cache); + space_seg_cache = NULL; +} + /* * Space map routines. * NOTE: caller is responsible for all locking. @@ -121,7 +138,7 @@ space_map_add(space_map_t *sm, uint64_t start, uint64_t size) avl_remove(sm->sm_pp_root, ss_after); } ss_after->ss_start = ss_before->ss_start; - kmem_free(ss_before, sizeof (*ss_before)); + kmem_cache_free(space_seg_cache, ss_before); ss = ss_after; } else if (merge_before) { ss_before->ss_end = end; @@ -134,7 +151,7 @@ space_map_add(space_map_t *sm, uint64_t start, uint64_t size) avl_remove(sm->sm_pp_root, ss_after); ss = ss_after; } else { - ss = kmem_alloc(sizeof (*ss), KM_PUSHPAGE); + ss = kmem_cache_alloc(space_seg_cache, KM_PUSHPAGE); ss->ss_start = start; ss->ss_end = end; avl_insert(&sm->sm_root, ss, where); @@ -181,7 +198,7 @@ space_map_remove(space_map_t *sm, uint64_t start, uint64_t size) avl_remove(sm->sm_pp_root, ss); if (left_over && right_over) { - newseg = kmem_alloc(sizeof (*newseg), KM_PUSHPAGE); + newseg = kmem_cache_alloc(space_seg_cache, KM_PUSHPAGE); newseg->ss_start = end; newseg->ss_end = ss->ss_end; ss->ss_end = start; @@ -194,7 +211,7 @@ space_map_remove(space_map_t *sm, uint64_t start, uint64_t size) ss->ss_start = end; } else { avl_remove(&sm->sm_root, ss); - kmem_free(ss, sizeof (*ss)); + kmem_cache_free(space_seg_cache, ss); ss = NULL; } @@ -234,7 +251,7 @@ space_map_vacate(space_map_t *sm, space_map_func_t *func, space_map_t *mdest) while ((ss = avl_destroy_nodes(&sm->sm_root, &cookie)) != NULL) { if (func != NULL) func(mdest, ss->ss_start, ss->ss_end - ss->ss_start); - kmem_free(ss, sizeof (*ss)); + kmem_cache_free(space_seg_cache, ss); } sm->sm_space = 0; } @@ -406,7 +423,7 @@ space_map_sync(space_map_t *sm, uint8_t maptype, spa_t *spa = dmu_objset_spa(os); void *cookie = NULL; space_seg_t *ss; - uint64_t bufsize, start, size, run_len; + uint64_t bufsize, start, size, run_len, delta, sm_space; uint64_t *entry, *entry_map, *entry_map_end; ASSERT(MUTEX_HELD(sm->sm_lock)); @@ -435,11 +452,13 @@ space_map_sync(space_map_t *sm, uint8_t maptype, SM_DEBUG_SYNCPASS_ENCODE(spa_sync_pass(spa)) | SM_DEBUG_TXG_ENCODE(dmu_tx_get_txg(tx)); + delta = 0; + sm_space = sm->sm_space; while ((ss = avl_destroy_nodes(&sm->sm_root, &cookie)) != NULL) { size = ss->ss_end - ss->ss_start; start = (ss->ss_start - sm->sm_start) >> sm->sm_shift; - sm->sm_space -= size; + delta += size; size >>= sm->sm_shift; while (size) { @@ -461,7 +480,7 @@ space_map_sync(space_map_t *sm, uint8_t maptype, start += run_len; size -= run_len; } - kmem_free(ss, sizeof (*ss)); + kmem_cache_free(space_seg_cache, ss); } if (entry != entry_map) { @@ -473,8 +492,15 @@ space_map_sync(space_map_t *sm, uint8_t maptype, smo->smo_objsize += size; } + /* + * Ensure that the space_map's accounting wasn't changed + * while we were in the middle of writing it out. + */ + VERIFY3U(sm->sm_space, ==, sm_space); + zio_buf_free(entry_map, bufsize); + sm->sm_space -= delta; VERIFY3U(sm->sm_space, ==, 0); } diff --git a/module/zfs/zio.c b/module/zfs/zio.c index a721903a3..fda76123e 100644 --- a/module/zfs/zio.c +++ b/module/zfs/zio.c @@ -85,6 +85,22 @@ extern vmem_t *zio_alloc_arena; extern int zfs_mg_alloc_failures; /* + * The following actions directly effect the spa's sync-to-convergence logic. + * The values below define the sync pass when we start performing the action. + * Care should be taken when changing these values as they directly impact + * spa_sync() performance. Tuning these values may introduce subtle performance + * pathologies and should only be done in the context of performance analysis. + * These tunables will eventually be removed and replaced with #defines once + * enough analysis has been done to determine optimal values. + * + * The 'zfs_sync_pass_deferred_free' pass must be greater than 1 to ensure that + * regular blocks are not deferred. + */ +int zfs_sync_pass_deferred_free = 2; /* defer frees starting in this pass */ +int zfs_sync_pass_dont_compress = 5; /* don't compress starting in this pass */ +int zfs_sync_pass_rewrite = 2; /* rewrite new bps starting in this pass */ + +/* * An allocating zio is one that either currently has the DVA allocate * stage set or will have it later in its lifetime. */ @@ -771,7 +787,7 @@ zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, ASSERT(!BP_IS_HOLE(bp)); ASSERT(spa_syncing_txg(spa) == txg); - ASSERT(spa_sync_pass(spa) <= SYNC_PASS_DEFERRED_FREE); + ASSERT(spa_sync_pass(spa) < zfs_sync_pass_deferred_free); zio = zio_create(pio, spa, txg, bp, NULL, BP_GET_PSIZE(bp), NULL, NULL, ZIO_TYPE_FREE, ZIO_PRIORITY_FREE, flags, @@ -1068,7 +1084,7 @@ zio_write_bp_init(zio_t *zio) ASSERT(zio->io_child_type == ZIO_CHILD_LOGICAL); ASSERT(!BP_GET_DEDUP(bp)); - if (pass > SYNC_PASS_DONT_COMPRESS) + if (pass >= zfs_sync_pass_dont_compress) compress = ZIO_COMPRESS_OFF; /* Make sure someone doesn't change their mind on overwrites */ @@ -1097,7 +1113,7 @@ zio_write_bp_init(zio_t *zio) * There should only be a handful of blocks after pass 1 in any case. */ if (bp->blk_birth == zio->io_txg && BP_GET_PSIZE(bp) == psize && - pass > SYNC_PASS_REWRITE) { + pass >= zfs_sync_pass_rewrite) { enum zio_stage gang_stages = zio->io_pipeline & ZIO_GANG_STAGES; ASSERT(psize != 0); zio->io_pipeline = ZIO_REWRITE_PIPELINE | gang_stages; |