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h=Subject:Reply-To:From:To:CC:Date:References:From; b=TfjITh4Rol/+nrqsOTz6cpzqDypOJfW91Z0EoSPjaa8GHT/n6Mhscbul3tzkGDmth COZcC6dgYEkHE/cwNbax1yQ71k/SMRJzIfAOip60SJPtFfHJklVcZ1w5ZZPtMBm0rX pDZkJcejCvESQyCzNWo/DjzCOJQJpxjU7Pr9ihWU= Received: from epsnrtp4.localdomain (unknown [182.195.42.165]) by epcas2p4.samsung.com (KnoxPortal) with ESMTP id 20230414030022epcas2p41f2601da8457ba9353857412c53fe270~VreIY7BnP1772317723epcas2p4M; Fri, 14 Apr 2023 03:00:22 +0000 (GMT) Received: from epsmges2p4.samsung.com (unknown [182.195.36.97]) by epsnrtp4.localdomain (Postfix) with ESMTP id 4PyLm56jzYz4x9Pq; Fri, 14 Apr 2023 03:00:21 +0000 (GMT) X-AuditID: b6c32a48-dc7ff700000025b2-74-6438c1c57724 Received: from epcas2p2.samsung.com ( [182.195.41.54]) by epsmges2p4.samsung.com (Symantec Messaging Gateway) with SMTP id A0.48.09650.5C1C8346; Fri, 14 Apr 2023 12:00:21 +0900 (KST) Mime-Version: 1.0 From: Daejun Park To: "jaegeuk@kernel.org" , "chao@kernel.org" , "corbet@lwn.net" , "rostedt@goodmis.org" , "mhiramat@kernel.org" X-Priority: 3 X-Content-Kind-Code: NORMAL X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <20230414025921epcms2p5736ebf6a215201e0c2a2c1a3f73ee06a@epcms2p5> Date: Fri, 14 Apr 2023 11:59:21 +0900 X-CMS-MailID: 20230414025921epcms2p5736ebf6a215201e0c2a2c1a3f73ee06a X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P X-CPGSPASS: Y X-CPGSPASS: Y X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrJJsWRmVeSWpSXmKPExsWy7bCmme7RgxYpBi+6TSwuzPvIbHF66lkm iycH2hktXh7StFj1INziyfpZzBYL25awWFxa5G5xedccNosj68+yWCxermaxr+MBk8WqjrmM FlPPH2Fy4PNo2XeL3WPTqk42j90LPjN5LO6bzOrRt2UVo8fnTXIBbFHZNhmpiSmpRQqpecn5 KZl56bZK3sHxzvGmZgaGuoaWFuZKCnmJuam2Si4+AbpumTlApyoplCXmlAKFAhKLi5X07WyK 8ktLUhUy8otLbJVSC1JyCswL9IoTc4tL89L18lJLrAwNDIxMgQoTsjM2fTrDUrDdvWJf91bm BsYpVl2MHBwSAiYS/2cZdjFycQgJ7GCU6OmexAYS5xUQlPi7Q7iLkZNDWMBaYu2yLiYQW0hA SWL9xVnsEHE9iVsP1zCC2GwCOhLTT9xnB5kjInCZUWLvioNgDrPAQWaJLfuPsYFUSQjwSsxo f8oCYUtLbF++lRHC1pD4sayXGcIWlbi5+i07jP3+2HyoGhGJ1ntnoWoEJR783A0Vl5S4PXcT VH2+xP8ry6HsGoltB+ZB2foS1zo2gu3lFfCV2H9zBlgvi4CqxJUDR6HmuEj8nvoc7E5mAXmJ 7W/nMIMCgllAU2L9Ln1IWClLHLnFAlHBJ9Fx+C87zFcNG39jZe+Y94QJwlaTWPdzPRPEGBmJ W/MYJzAqzUIE9Cwka2chrF3AyLyKUSy1oDg3PbXYqMAEHrXJ+bmbGMFpVstjB+Pstx/0DjEy cTAeYpTgYFYS4f3hYpoixJuSWFmVWpQfX1Sak1p8iNEU6OGJzFKiyfnARJ9XEm9oYmlgYmZm aG5kamCuJM77sUM5RUggPbEkNTs1tSC1CKaPiYNTqoGpOnlFfVjjJKZVL0TDWU/HGP65sP// vcaX+y0YdLuXLYl57F64Tkoitqqly1tRnM38aGKxWubyLqcGnafv0mL3Hgqa18z0fybrhekX G0Nm3kr4cycpV3v/q9Xxy4IWu6orPq6s+7ZNIHzzn01P/i668mSXSLS2WdKsL558hg8/7NFc tWmG28ndfSeORrtZhG+pdJLV9l6UcX6x5qJlV+/O/GQW4m/7+oft6qVPAw/Wfpven/lyfvaz mWkpi4Lm1c7T+npLetId11aunbvnrbujUpX56uRM9VAOfUFlo/VWF3Rbl65ldnv6+G7xUs++ j3G/7ujFKJ5RCHtfMW3r8Zki2oZzfxqLhZuX8CqLtN89osRSnJFoqMVcVJwIALZ1V+M8BAAA DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230414025921epcms2p5736ebf6a215201e0c2a2c1a3f73ee06a References: X-Headers-End: 1pn9ft-0005W6-AQ Subject: [f2fs-dev] [PATCH] f2fs: add async reset zone command support X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: daejun7.park@samsung.com Cc: "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , beomsu kim , Seokhwan Kim , "linux-f2fs-devel@lists.sourceforge.net" , "linux-trace-kernel@vger.kernel.org" Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net This patch enables submit reset zone command asynchornously. It helps decrease average latency of write IOs in high utilization scenario by faster checkpointing. Signed-off-by: Daejun Park --- Documentation/filesystems/f2fs.rst | 4 ++ fs/f2fs/f2fs.h | 1 + fs/f2fs/segment.c | 92 +++++++++++++++++++++++++++++- fs/f2fs/super.c | 8 +++ include/trace/events/f2fs.h | 18 +++++- 5 files changed, 119 insertions(+), 4 deletions(-) diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index 2055e72871fe..4cfabf831a79 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -342,6 +342,10 @@ discard_unit=%s Control discard unit, the argument can be "block", "segment" default, it is helpful for large sized SMR or ZNS devices to reduce memory cost by getting rid of fs metadata supports small discard. +async_reset_zone Enable the RESET WRITE POINTER command to be submitted asynchronously. + With this option, the RESET WRITE POINTER command can be processed by + the discard thread like a discard command. It can reduce checkpoint + latency by asynchronously checking for completion of the RESET WRITE POINTER command. memory=%s Control memory mode. This supports "normal" and "low" modes. "low" mode is introduced to support low memory devices. Because of the nature of low memory devices, in this mode, f2fs diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 4e2596dacbf1..021e55c5d1a8 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -167,6 +167,7 @@ struct f2fs_mount_info { * be aligned to this unit: block, * segment or section */ + bool async_zone_reset; /* async zone reset */ struct fscrypt_dummy_policy dummy_enc_policy; /* test dummy encryption */ block_t unusable_cap_perc; /* percentage for cap */ block_t unusable_cap; /* Amount of space allowed to be diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 45128694eefa..60cfe97c9dbd 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1189,6 +1189,46 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi, static void __update_discard_tree_range(struct f2fs_sb_info *sbi, struct block_device *bdev, block_t lstart, block_t start, block_t len); + +#ifdef CONFIG_BLK_DEV_ZONED +static int __submit_zone_reset_cmd(struct f2fs_sb_info *sbi, + struct discard_cmd *dc, blk_opf_t flag, + struct list_head *wait_list, + unsigned int *issued) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + struct block_device *bdev = dc->bdev; + struct bio *bio = bio_alloc(bdev, 0, REQ_OP_ZONE_RESET | flag, GFP_NOFS); + unsigned long flags; + + trace_f2fs_issue_reset_zone(bdev, SECTOR_FROM_BLOCK(dc->di.start)); + + spin_lock_irqsave(&dc->lock, flags); + dc->state = D_SUBMIT; + dc->bio_ref++; + spin_unlock_irqrestore(&dc->lock, flags); + + if (issued) + (*issued)++; + + atomic_inc(&dcc->queued_discard); + dc->queued++; + list_move_tail(&dc->list, wait_list); + + /* sanity check on discard range */ + __check_sit_bitmap(sbi, dc->di.lstart, dc->di.lstart + dc->di.len); + + bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(dc->di.start); + bio->bi_private = dc; + bio->bi_end_io = f2fs_submit_discard_endio; + submit_bio(bio); + + atomic_inc(&dcc->issued_discard); + + return 0; +} +#endif + /* this function is copied from blkdev_issue_discard from block/blk-lib.c */ static int __submit_discard_cmd(struct f2fs_sb_info *sbi, struct discard_policy *dpolicy, @@ -1210,6 +1250,11 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi, if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) return 0; +#ifdef CONFIG_BLK_DEV_ZONED + if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev)) + return __submit_zone_reset_cmd(sbi, dc, flag, wait_list, issued); +#endif + trace_f2fs_issue_discard(bdev, dc->di.start, dc->di.len); lstart = dc->di.lstart; @@ -1454,21 +1499,42 @@ static void __update_discard_tree_range(struct f2fs_sb_info *sbi, } } +#ifdef CONFIG_BLK_DEV_ZONED +static void __queue_zone_reset_cmd(struct f2fs_sb_info *sbi, + struct block_device *bdev, block_t blkstart, block_t blklen) +{ + block_t lblkstart = blkstart; + + if (f2fs_is_multi_device(sbi)) { + int devi = f2fs_target_device_index(sbi, blkstart); + + blkstart -= FDEV(devi).start_blk; + } + + trace_f2fs_queue_reset_zone(bdev, blkstart); + + mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock); + __insert_discard_cmd(sbi, bdev, lblkstart, blkstart, blklen); + mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock); +} +#endif + static void __queue_discard_cmd(struct f2fs_sb_info *sbi, struct block_device *bdev, block_t blkstart, block_t blklen) { block_t lblkstart = blkstart; + trace_f2fs_queue_discard(bdev, blkstart, blklen); + if (!f2fs_bdev_support_discard(bdev)) return; - trace_f2fs_queue_discard(bdev, blkstart, blklen); - if (f2fs_is_multi_device(sbi)) { int devi = f2fs_target_device_index(sbi, blkstart); blkstart -= FDEV(devi).start_blk; } + mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock); __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen); mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock); @@ -1719,7 +1785,22 @@ static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr) dc = __lookup_discard_cmd(sbi, blkaddr); if (dc) { if (dc->state == D_PREP) { +#ifdef CONFIG_BLK_DEV_ZONED + if (f2fs_sb_has_blkzoned(sbi) && + bdev_is_zoned(dc->bdev)) { + struct discard_policy dpolicy; + /* force submit zone reset */ + __init_discard_policy(sbi, &dpolicy, + DPOLICY_FORCE, 1); + __submit_discard_cmd(sbi, &dpolicy, dc, NULL); + dc->ref++; + need_wait = true; + } else { + __punch_discard_cmd(sbi, dc, blkaddr); + } +#else __punch_discard_cmd(sbi, dc, blkaddr); +#endif } else { dc->ref++; need_wait = true; @@ -1869,6 +1950,13 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi, blkstart, blklen); return -EIO; } + + if (likely(!is_sbi_flag_set(sbi, SBI_POR_DOING)) && + F2FS_OPTION(sbi).async_zone_reset) { + __queue_zone_reset_cmd(sbi, bdev, lblkstart, blklen); + return 0; + } + trace_f2fs_issue_reset_zone(bdev, blkstart); return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, sector, nr_sects, GFP_NOFS); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 7d0202f7b317..48198112cbbc 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -162,6 +162,7 @@ enum { Opt_gc_merge, Opt_nogc_merge, Opt_discard_unit, + Opt_async_zone_reset, Opt_memory_mode, Opt_age_extent_cache, Opt_err, @@ -241,6 +242,7 @@ static match_table_t f2fs_tokens = { {Opt_gc_merge, "gc_merge"}, {Opt_nogc_merge, "nogc_merge"}, {Opt_discard_unit, "discard_unit=%s"}, + {Opt_async_zone_reset, "async_zone_reset"}, {Opt_memory_mode, "memory=%s"}, {Opt_age_extent_cache, "age_extent_cache"}, {Opt_err, NULL}, @@ -1249,6 +1251,9 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) } kfree(name); break; + case Opt_async_zone_reset: + F2FS_OPTION(sbi).async_zone_reset = true; + break; case Opt_memory_mode: name = match_strdup(&args[0]); if (!name) @@ -2047,6 +2052,9 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) if (test_opt(sbi, ATGC)) seq_puts(seq, ",atgc"); + if (F2FS_OPTION(sbi).async_zone_reset) + seq_puts(seq, ",async_zone_reset"); + if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL) seq_printf(seq, ",memory=%s", "normal"); else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW) diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index 99cbc5949e3c..ee1477de8324 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -1512,7 +1512,7 @@ DEFINE_EVENT(f2fs_discard, f2fs_remove_discard, TP_ARGS(dev, blkstart, blklen) ); -TRACE_EVENT(f2fs_issue_reset_zone, +DECLARE_EVENT_CLASS(f2fs_reset_zone, TP_PROTO(struct block_device *dev, block_t blkstart), @@ -1528,11 +1528,25 @@ TRACE_EVENT(f2fs_issue_reset_zone, __entry->blkstart = blkstart; ), - TP_printk("dev = (%d,%d), reset zone at block = 0x%llx", + TP_printk("dev = (%d,%d), zone at block = 0x%llx", show_dev(__entry->dev), (unsigned long long)__entry->blkstart) ); +DEFINE_EVENT(f2fs_reset_zone, f2fs_queue_reset_zone, + + TP_PROTO(struct block_device *dev, block_t blkstart), + + TP_ARGS(dev, blkstart) +); + +DEFINE_EVENT(f2fs_reset_zone, f2fs_issue_reset_zone, + + TP_PROTO(struct block_device *dev, block_t blkstart), + + TP_ARGS(dev, blkstart) +); + TRACE_EVENT(f2fs_issue_flush, TP_PROTO(struct block_device *dev, unsigned int nobarrier,