diff options
Diffstat (limited to 'sys/cddl')
7 files changed, 100 insertions, 109 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil.h index 8887aa8..8b206a3 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil.h +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil.h @@ -369,7 +369,6 @@ typedef struct itx { void *itx_private; /* type-specific opaque data */ itx_wr_state_t itx_wr_state; /* write state */ uint8_t itx_sync; /* synchronous transaction */ - uint64_t itx_sod; /* record size on disk */ uint64_t itx_oid; /* object id */ lr_t itx_lr; /* common part of log record */ /* followed by type-specific part of lr_xx_t and its immediate data */ diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil_impl.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil_impl.h index ac908bd..a1ed9e5 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil_impl.h +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zil_impl.h @@ -42,6 +42,7 @@ extern "C" { typedef struct lwb { zilog_t *lwb_zilog; /* back pointer to log struct */ blkptr_t lwb_blk; /* on disk address of this log blk */ + boolean_t lwb_slog; /* lwb_blk is on SLOG device */ int lwb_nused; /* # used bytes in buffer */ int lwb_sz; /* size of block and buffer */ char *lwb_buf; /* log write buffer */ @@ -62,7 +63,6 @@ typedef struct itxs { typedef struct itxg { kmutex_t itxg_lock; /* lock for this structure */ uint64_t itxg_txg; /* txg for this chain */ - uint64_t itxg_sod; /* total size on disk for this txg */ itxs_t *itxg_itxs; /* sync and async itxs */ } itxg_t; @@ -120,7 +120,6 @@ struct zilog { kcondvar_t zl_cv_batch[2]; /* batch condition variables */ itxg_t zl_itxg[TXG_SIZE]; /* intent log txg chains */ list_t zl_itx_commit_list; /* itx list to be committed */ - uint64_t zl_itx_list_sz; /* total size of records on list */ uint64_t zl_cur_used; /* current commit log size used */ list_t zl_lwb_list; /* in-flight log write list */ kmutex_t zl_vdev_lock; /* protects zl_vdev_tree */ @@ -142,6 +141,8 @@ typedef struct zil_bp_node { #define ZIL_MAX_LOG_DATA (SPA_OLD_MAXBLOCKSIZE - sizeof (zil_chain_t) - \ sizeof (lr_write_t)) +#define ZIL_MAX_COPIED_DATA \ + ((SPA_OLD_MAXBLOCKSIZE - sizeof (zil_chain_t)) / 2 - sizeof (lr_write_t)) #ifdef __cplusplus } diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h index 9d3beaa..c57d0ad 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h @@ -546,7 +546,7 @@ extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg, const blkptr_t *bp, uint64_t size, enum zio_flag flags); extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, - blkptr_t *old_bp, uint64_t size, boolean_t use_slog); + blkptr_t *old_bp, uint64_t size, boolean_t *slog); extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp); extern void zio_flush(zio_t *zio, vdev_t *vd); extern zio_t *zio_trim(zio_t *zio, spa_t *spa, vdev_t *vd, uint64_t offset, diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c index 6933ccd..048bd9d 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c @@ -459,20 +459,17 @@ void zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype, znode_t *zp, offset_t off, ssize_t resid, int ioflag) { + uint32_t blocksize = zp->z_blksz; itx_wr_state_t write_state; - boolean_t slogging; uintptr_t fsync_cnt; - ssize_t immediate_write_sz; if (zil_replaying(zilog, tx) || zp->z_unlinked) return; - immediate_write_sz = (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT) - ? 0 : zfs_immediate_write_sz; - - slogging = spa_has_slogs(zilog->zl_spa) && - (zilog->zl_logbias == ZFS_LOGBIAS_LATENCY); - if (resid > immediate_write_sz && !slogging && resid <= zp->z_blksz) + if (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT) + write_state = WR_INDIRECT; + else if (!spa_has_slogs(zilog->zl_spa) && + resid >= zfs_immediate_write_sz) write_state = WR_INDIRECT; else if (ioflag & (FSYNC | FDSYNC)) write_state = WR_COPIED; @@ -486,30 +483,26 @@ zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype, while (resid) { itx_t *itx; lr_write_t *lr; - ssize_t len; + itx_wr_state_t wr_state = write_state; + ssize_t len = resid; - /* - * If the write would overflow the largest block then split it. - */ - if (write_state != WR_INDIRECT && resid > ZIL_MAX_LOG_DATA) - len = SPA_OLD_MAXBLOCKSIZE >> 1; - else - len = resid; + if (wr_state == WR_COPIED && resid > ZIL_MAX_COPIED_DATA) + wr_state = WR_NEED_COPY; + else if (wr_state == WR_INDIRECT) + len = MIN(blocksize - P2PHASE(off, blocksize), resid); itx = zil_itx_create(txtype, sizeof (*lr) + - (write_state == WR_COPIED ? len : 0)); + (wr_state == WR_COPIED ? len : 0)); lr = (lr_write_t *)&itx->itx_lr; - if (write_state == WR_COPIED && dmu_read(zp->z_zfsvfs->z_os, + if (wr_state == WR_COPIED && dmu_read(zp->z_zfsvfs->z_os, zp->z_id, off, len, lr + 1, DMU_READ_NO_PREFETCH) != 0) { zil_itx_destroy(itx); itx = zil_itx_create(txtype, sizeof (*lr)); lr = (lr_write_t *)&itx->itx_lr; - write_state = WR_NEED_COPY; + wr_state = WR_NEED_COPY; } - itx->itx_wr_state = write_state; - if (write_state == WR_NEED_COPY) - itx->itx_sod += len; + itx->itx_wr_state = wr_state; lr->lr_foid = zp->z_id; lr->lr_offset = off; lr->lr_length = len; diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c index b048847..27ffed6 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c @@ -87,6 +87,15 @@ SYSCTL_DECL(_vfs_zfs_trim); SYSCTL_INT(_vfs_zfs_trim, OID_AUTO, enabled, CTLFLAG_RDTUN, &zfs_trim_enabled, 0, "Enable ZFS TRIM"); +/* + * Limit SLOG write size per commit executed with synchronous priority. + * Any writes above that executed with lower (asynchronous) priority to + * limit potential SLOG device abuse by single active ZIL writer. + */ +uint64_t zil_slog_limit = 768 * 1024; +SYSCTL_QUAD(_vfs_zfs, OID_AUTO, zil_slog_limit, CTLFLAG_RWTUN, + &zil_slog_limit, 0, "Maximal SLOG commit size with sync priority"); + static kmem_cache_t *zil_lwb_cache; #define LWB_EMPTY(lwb) ((BP_GET_LSIZE(&lwb->lwb_blk) - \ @@ -446,13 +455,14 @@ zil_free_log_record(zilog_t *zilog, lr_t *lrc, void *tx, uint64_t claim_txg) } static lwb_t * -zil_alloc_lwb(zilog_t *zilog, blkptr_t *bp, uint64_t txg) +zil_alloc_lwb(zilog_t *zilog, blkptr_t *bp, boolean_t slog, uint64_t txg) { lwb_t *lwb; lwb = kmem_cache_alloc(zil_lwb_cache, KM_SLEEP); lwb->lwb_zilog = zilog; lwb->lwb_blk = *bp; + lwb->lwb_slog = slog; lwb->lwb_buf = zio_buf_alloc(BP_GET_LSIZE(bp)); lwb->lwb_max_txg = txg; lwb->lwb_zio = NULL; @@ -536,6 +546,7 @@ zil_create(zilog_t *zilog) dmu_tx_t *tx = NULL; blkptr_t blk; int error = 0; + boolean_t slog = FALSE; /* * Wait for any previous destroy to complete. @@ -564,7 +575,7 @@ zil_create(zilog_t *zilog) } error = zio_alloc_zil(zilog->zl_spa, txg, &blk, NULL, - ZIL_MIN_BLKSZ, zilog->zl_logbias == ZFS_LOGBIAS_LATENCY); + ZIL_MIN_BLKSZ, &slog); if (error == 0) zil_init_log_chain(zilog, &blk); @@ -574,7 +585,7 @@ zil_create(zilog_t *zilog) * Allocate a log write buffer (lwb) for the first log block. */ if (error == 0) - lwb = zil_alloc_lwb(zilog, &blk, txg); + lwb = zil_alloc_lwb(zilog, &blk, slog, txg); /* * If we just allocated the first log block, commit our transaction @@ -907,6 +918,7 @@ static void zil_lwb_write_init(zilog_t *zilog, lwb_t *lwb) { zbookmark_phys_t zb; + zio_priority_t prio; SET_BOOKMARK(&zb, lwb->lwb_blk.blk_cksum.zc_word[ZIL_ZC_OBJSET], ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, @@ -917,9 +929,13 @@ zil_lwb_write_init(zilog_t *zilog, lwb_t *lwb) ZIO_FLAG_CANFAIL); } if (lwb->lwb_zio == NULL) { + if (zilog->zl_cur_used <= zil_slog_limit || !lwb->lwb_slog) + prio = ZIO_PRIORITY_SYNC_WRITE; + else + prio = ZIO_PRIORITY_ASYNC_WRITE; lwb->lwb_zio = zio_rewrite(zilog->zl_root_zio, zilog->zl_spa, 0, &lwb->lwb_blk, lwb->lwb_buf, BP_GET_LSIZE(&lwb->lwb_blk), - zil_lwb_write_done, lwb, ZIO_PRIORITY_SYNC_WRITE, + zil_lwb_write_done, lwb, prio, ZIO_FLAG_CANFAIL | ZIO_FLAG_DONT_PROPAGATE, &zb); } } @@ -939,18 +955,6 @@ uint64_t zil_block_buckets[] = { }; /* - * Use the slog as long as the logbias is 'latency' and the current commit size - * is less than the limit or the total list size is less than 2X the limit. - * Limit checking is disabled by setting zil_slog_limit to UINT64_MAX. - */ -uint64_t zil_slog_limit = 1024 * 1024; -SYSCTL_QUAD(_vfs_zfs, OID_AUTO, zil_slog_limit, CTLFLAG_RWTUN, - &zil_slog_limit, 0, "Maximal commit size to use SLOG"); -#define USE_SLOG(zilog) (((zilog)->zl_logbias == ZFS_LOGBIAS_LATENCY) && \ - (((zilog)->zl_cur_used < zil_slog_limit) || \ - ((zilog)->zl_itx_list_sz < (zil_slog_limit << 1)))) - -/* * Start a log block write and advance to the next log block. * Calls are serialized. */ @@ -965,6 +969,7 @@ zil_lwb_write_start(zilog_t *zilog, lwb_t *lwb, boolean_t last) uint64_t txg; uint64_t zil_blksz, wsz; int i, error; + boolean_t slog; if (BP_GET_CHECKSUM(&lwb->lwb_blk) == ZIO_CHECKSUM_ZILOG2) { zilc = (zil_chain_t *)lwb->lwb_buf; @@ -1021,8 +1026,7 @@ zil_lwb_write_start(zilog_t *zilog, lwb_t *lwb, boolean_t last) BP_ZERO(bp); /* pass the old blkptr in order to spread log blocks across devs */ - error = zio_alloc_zil(spa, txg, bp, &lwb->lwb_blk, zil_blksz, - USE_SLOG(zilog)); + error = zio_alloc_zil(spa, txg, bp, &lwb->lwb_blk, zil_blksz, &slog); if (error == 0) { ASSERT3U(bp->blk_birth, ==, txg); bp->blk_cksum = lwb->lwb_blk.blk_cksum; @@ -1031,7 +1035,7 @@ zil_lwb_write_start(zilog_t *zilog, lwb_t *lwb, boolean_t last) /* * Allocate a new log write buffer (lwb). */ - nlwb = zil_alloc_lwb(zilog, bp, txg); + nlwb = zil_alloc_lwb(zilog, bp, slog, txg); /* Record the block for later vdev flushing */ zil_add_block(zilog, &lwb->lwb_blk); @@ -1070,12 +1074,13 @@ zil_lwb_write_start(zilog_t *zilog, lwb_t *lwb, boolean_t last) static lwb_t * zil_lwb_commit(zilog_t *zilog, itx_t *itx, lwb_t *lwb) { - lr_t *lrc = &itx->itx_lr; /* common log record */ - lr_write_t *lrw = (lr_write_t *)lrc; + lr_t *lrcb, *lrc = &itx->itx_lr; /* common log record */ + lr_write_t *lrwb, *lrw = (lr_write_t *)lrc; char *lr_buf; uint64_t txg = lrc->lrc_txg; uint64_t reclen = lrc->lrc_reclen; uint64_t dlen = 0; + uint64_t dnow, lwb_sp; if (lwb == NULL) return (NULL); @@ -1090,25 +1095,30 @@ zil_lwb_commit(zilog_t *zilog, itx_t *itx, lwb_t *lwb) zil_lwb_write_init(zilog, lwb); +cont: /* * If this record won't fit in the current log block, start a new one. + * For WR_NEED_COPY optimize layout for minimal number of chunks, but + * try to keep wasted space withing reasonable range (12%). */ - if (lwb->lwb_nused + reclen + dlen > lwb->lwb_sz) { + lwb_sp = lwb->lwb_sz - lwb->lwb_nused; + if (reclen > lwb_sp || (reclen + dlen > lwb_sp && + lwb_sp < ZIL_MAX_LOG_DATA / 8 && (dlen % ZIL_MAX_LOG_DATA == 0 || + lwb_sp < reclen + dlen % ZIL_MAX_LOG_DATA))) { lwb = zil_lwb_write_start(zilog, lwb, B_FALSE); if (lwb == NULL) return (NULL); zil_lwb_write_init(zilog, lwb); ASSERT(LWB_EMPTY(lwb)); - if (lwb->lwb_nused + reclen + dlen > lwb->lwb_sz) { - txg_wait_synced(zilog->zl_dmu_pool, txg); - return (lwb); - } + lwb_sp = lwb->lwb_sz - lwb->lwb_nused; + ASSERT3U(reclen + MIN(dlen, sizeof(uint64_t)), <=, lwb_sp); } + dnow = MIN(dlen, lwb_sp - reclen); lr_buf = lwb->lwb_buf + lwb->lwb_nused; bcopy(lrc, lr_buf, reclen); - lrc = (lr_t *)lr_buf; - lrw = (lr_write_t *)lrc; + lrcb = (lr_t *)lr_buf; + lrwb = (lr_write_t *)lrcb; /* * If it's a write, fetch the data or get its blkptr as appropriate. @@ -1120,16 +1130,19 @@ zil_lwb_commit(zilog_t *zilog, itx_t *itx, lwb_t *lwb) char *dbuf; int error; - if (dlen) { - ASSERT(itx->itx_wr_state == WR_NEED_COPY); + if (itx->itx_wr_state == WR_NEED_COPY) { dbuf = lr_buf + reclen; - lrw->lr_common.lrc_reclen += dlen; + lrcb->lrc_reclen += dnow; + if (lrwb->lr_length > dnow) + lrwb->lr_length = dnow; + lrw->lr_offset += dnow; + lrw->lr_length -= dnow; } else { ASSERT(itx->itx_wr_state == WR_INDIRECT); dbuf = NULL; } error = zilog->zl_get_data( - itx->itx_private, lrw, dbuf, lwb->lwb_zio); + itx->itx_private, lrwb, dbuf, lwb->lwb_zio); if (error == EIO) { txg_wait_synced(zilog->zl_dmu_pool, txg); return (lwb); @@ -1148,12 +1161,18 @@ zil_lwb_commit(zilog_t *zilog, itx_t *itx, lwb_t *lwb) * equal to the itx sequence number because not all transactions * are synchronous, and sometimes spa_sync() gets there first. */ - lrc->lrc_seq = ++zilog->zl_lr_seq; /* we are single threaded */ - lwb->lwb_nused += reclen + dlen; + lrcb->lrc_seq = ++zilog->zl_lr_seq; /* we are single threaded */ + lwb->lwb_nused += reclen + dnow; lwb->lwb_max_txg = MAX(lwb->lwb_max_txg, txg); ASSERT3U(lwb->lwb_nused, <=, lwb->lwb_sz); ASSERT0(P2PHASE(lwb->lwb_nused, sizeof (uint64_t))); + dlen -= dnow; + if (dlen > 0) { + zilog->zl_cur_used += reclen; + goto cont; + } + return (lwb); } @@ -1167,7 +1186,6 @@ zil_itx_create(uint64_t txtype, size_t lrsize) itx = kmem_alloc(offsetof(itx_t, itx_lr) + lrsize, KM_SLEEP); itx->itx_lr.lrc_txtype = txtype; itx->itx_lr.lrc_reclen = lrsize; - itx->itx_sod = lrsize; /* if write & WR_NEED_COPY will be increased */ itx->itx_lr.lrc_seq = 0; /* defensive */ itx->itx_sync = B_TRUE; /* default is synchronous */ @@ -1316,11 +1334,8 @@ zil_itx_assign(zilog_t *zilog, itx_t *itx, dmu_tx_t *tx) * this itxg. Save the itxs for release below. * This should be rare. */ - atomic_add_64(&zilog->zl_itx_list_sz, -itxg->itxg_sod); - itxg->itxg_sod = 0; clean = itxg->itxg_itxs; } - ASSERT(itxg->itxg_sod == 0); itxg->itxg_txg = txg; itxs = itxg->itxg_itxs = kmem_zalloc(sizeof (itxs_t), KM_SLEEP); @@ -1332,8 +1347,6 @@ zil_itx_assign(zilog_t *zilog, itx_t *itx, dmu_tx_t *tx) } if (itx->itx_sync) { list_insert_tail(&itxs->i_sync_list, itx); - atomic_add_64(&zilog->zl_itx_list_sz, itx->itx_sod); - itxg->itxg_sod += itx->itx_sod; } else { avl_tree_t *t = &itxs->i_async_tree; uint64_t foid = ((lr_ooo_t *)&itx->itx_lr)->lr_foid; @@ -1381,8 +1394,6 @@ zil_clean(zilog_t *zilog, uint64_t synced_txg) ASSERT3U(itxg->itxg_txg, <=, synced_txg); ASSERT(itxg->itxg_txg != 0); ASSERT(zilog->zl_clean_taskq != NULL); - atomic_add_64(&zilog->zl_itx_list_sz, -itxg->itxg_sod); - itxg->itxg_sod = 0; clean_me = itxg->itxg_itxs; itxg->itxg_itxs = NULL; itxg->itxg_txg = 0; @@ -1406,7 +1417,6 @@ zil_get_commit_list(zilog_t *zilog) { uint64_t otxg, txg; list_t *commit_list = &zilog->zl_itx_commit_list; - uint64_t push_sod = 0; if (spa_freeze_txg(zilog->zl_spa) != UINT64_MAX) /* ziltest support */ otxg = ZILTEST_TXG; @@ -1438,12 +1448,9 @@ zil_get_commit_list(zilog_t *zilog) ASSERT(zilog_is_dirty_in_txg(zilog, txg) || spa_freeze_txg(zilog->zl_spa) != UINT64_MAX); list_move_tail(commit_list, &itxg->itxg_itxs->i_sync_list); - push_sod += itxg->itxg_sod; - itxg->itxg_sod = 0; mutex_exit(&itxg->itxg_lock); } - atomic_add_64(&zilog->zl_itx_list_sz, -push_sod); } /* diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c index f8907c1..d72fb92 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c @@ -2923,20 +2923,21 @@ zio_dva_unallocate(zio_t *zio, zio_gang_node_t *gn, blkptr_t *bp) */ int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp, blkptr_t *old_bp, - uint64_t size, boolean_t use_slog) + uint64_t size, boolean_t *slog) { int error = 1; ASSERT(txg > spa_syncing_txg(spa)); - if (use_slog) { - error = metaslab_alloc(spa, spa_log_class(spa), size, - new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID, NULL); - } - - if (error) { + error = metaslab_alloc(spa, spa_log_class(spa), size, + new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID, NULL); + if (error == 0) { + *slog = TRUE; + } else { error = metaslab_alloc(spa, spa_normal_class(spa), size, new_bp, 1, txg, old_bp, METASLAB_HINTBP_AVOID, NULL); + if (error == 0) + *slog = FALSE; } if (error == 0) { diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c index 07de1d0..4751de7 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c @@ -1392,54 +1392,44 @@ zvol_log_write(zvol_state_t *zv, dmu_tx_t *tx, offset_t off, ssize_t resid, { uint32_t blocksize = zv->zv_volblocksize; zilog_t *zilog = zv->zv_zilog; - boolean_t slogging; - ssize_t immediate_write_sz; + itx_wr_state_t write_state; if (zil_replaying(zilog, tx)) return; - immediate_write_sz = (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT) - ? 0 : zvol_immediate_write_sz; - - slogging = spa_has_slogs(zilog->zl_spa) && - (zilog->zl_logbias == ZFS_LOGBIAS_LATENCY); + if (zilog->zl_logbias == ZFS_LOGBIAS_THROUGHPUT) + write_state = WR_INDIRECT; + else if (!spa_has_slogs(zilog->zl_spa) && + resid >= blocksize && blocksize > zvol_immediate_write_sz) + write_state = WR_INDIRECT; + else if (sync) + write_state = WR_COPIED; + else + write_state = WR_NEED_COPY; while (resid) { itx_t *itx; lr_write_t *lr; - ssize_t len; - itx_wr_state_t write_state; + itx_wr_state_t wr_state = write_state; + ssize_t len = resid; - /* - * Unlike zfs_log_write() we can be called with - * upto DMU_MAX_ACCESS/2 (5MB) writes. - */ - if (blocksize > immediate_write_sz && !slogging && - resid >= blocksize && off % blocksize == 0) { - write_state = WR_INDIRECT; /* uses dmu_sync */ - len = blocksize; - } else if (sync) { - write_state = WR_COPIED; - len = MIN(ZIL_MAX_LOG_DATA, resid); - } else { - write_state = WR_NEED_COPY; - len = MIN(ZIL_MAX_LOG_DATA, resid); - } + if (wr_state == WR_COPIED && resid > ZIL_MAX_COPIED_DATA) + wr_state = WR_NEED_COPY; + else if (wr_state == WR_INDIRECT) + len = MIN(blocksize - P2PHASE(off, blocksize), resid); itx = zil_itx_create(TX_WRITE, sizeof (*lr) + - (write_state == WR_COPIED ? len : 0)); + (wr_state == WR_COPIED ? len : 0)); lr = (lr_write_t *)&itx->itx_lr; - if (write_state == WR_COPIED && dmu_read(zv->zv_objset, + if (wr_state == WR_COPIED && dmu_read(zv->zv_objset, ZVOL_OBJ, off, len, lr + 1, DMU_READ_NO_PREFETCH) != 0) { zil_itx_destroy(itx); itx = zil_itx_create(TX_WRITE, sizeof (*lr)); lr = (lr_write_t *)&itx->itx_lr; - write_state = WR_NEED_COPY; + wr_state = WR_NEED_COPY; } - itx->itx_wr_state = write_state; - if (write_state == WR_NEED_COPY) - itx->itx_sod += len; + itx->itx_wr_state = wr_state; lr->lr_foid = ZVOL_OBJ; lr->lr_offset = off; lr->lr_length = len; |
