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Thu, 29 Aug 2024 14:52:48 -0700 (PDT) Received: from daehojeong-desktop.mtv.corp.google.com ([2a00:79e0:2e14:7:a1e7:73eb:e77e:3e2b]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7d22e9d512asm1705653a12.78.2024.08.29.14.52.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Aug 2024 14:52:47 -0700 (PDT) From: Daeho Jeong To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, kernel-team@android.com Date: Thu, 29 Aug 2024 14:52:36 -0700 Message-ID: <20240829215242.3641502-1-daeho43@gmail.com> X-Mailer: git-send-email 2.46.0.469.g59c65b2a67-goog MIME-Version: 1.0 X-Headers-End: 1sjn4Y-0007bF-4Z Subject: [f2fs-dev] [PATCH 1/7] f2fs: make BG GC more aggressive for zoned devices 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: , Cc: Daeho Jeong Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Daeho Jeong Since we don't have any GC on device side for zoned devices, need more aggressive BG GC. So, tune the parameters for that. Signed-off-by: Daeho Jeong Reviewed-by: Chao Yu --- fs/f2fs/f2fs.h | 20 ++++++++++++++++++-- fs/f2fs/gc.c | 25 +++++++++++++++++++++---- fs/f2fs/gc.h | 22 ++++++++++++++++++++++ fs/f2fs/super.c | 8 +++++++- 4 files changed, 68 insertions(+), 7 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index ac19c61f0c3e..5e4db3ba534a 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2854,13 +2854,26 @@ static inline bool is_inflight_io(struct f2fs_sb_info *sbi, int type) return false; } +static inline bool is_inflight_read_io(struct f2fs_sb_info *sbi) +{ + return get_pages(sbi, F2FS_RD_DATA) || get_pages(sbi, F2FS_DIO_READ); +} + static inline bool is_idle(struct f2fs_sb_info *sbi, int type) { + bool zoned_gc = (type == GC_TIME && + F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_BLKZONED)); + if (sbi->gc_mode == GC_URGENT_HIGH) return true; - if (is_inflight_io(sbi, type)) - return false; + if (zoned_gc) { + if (is_inflight_read_io(sbi)) + return false; + } else { + if (is_inflight_io(sbi, type)) + return false; + } if (sbi->gc_mode == GC_URGENT_MID) return true; @@ -2869,6 +2882,9 @@ static inline bool is_idle(struct f2fs_sb_info *sbi, int type) (type == DISCARD_TIME || type == GC_TIME)) return true; + if (zoned_gc) + return true; + return f2fs_time_over(sbi, type); } diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 724bbcb447d3..46e3bc26b78a 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -116,7 +116,17 @@ static int gc_thread_func(void *data) goto next; } - if (has_enough_invalid_blocks(sbi)) + if (f2fs_sb_has_blkzoned(sbi)) { + if (has_enough_free_blocks(sbi, LIMIT_NO_ZONED_GC)) { + wait_ms = gc_th->no_gc_sleep_time; + f2fs_up_write(&sbi->gc_lock); + goto next; + } + if (wait_ms == gc_th->no_gc_sleep_time) + wait_ms = gc_th->max_sleep_time; + } + + if (need_to_boost_gc(sbi)) decrease_sleep_time(gc_th, &wait_ms); else increase_sleep_time(gc_th, &wait_ms); @@ -179,9 +189,16 @@ int f2fs_start_gc_thread(struct f2fs_sb_info *sbi) return -ENOMEM; gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME; - gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME; - gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME; - gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME; + + if (f2fs_sb_has_blkzoned(sbi)) { + gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED; + gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME_ZONED; + gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME_ZONED; + } else { + gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME; + gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME; + gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME; + } gc_th->gc_wake = false; diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h index a8ea3301b815..14ae85f33235 100644 --- a/fs/f2fs/gc.h +++ b/fs/f2fs/gc.h @@ -15,6 +15,11 @@ #define DEF_GC_THREAD_MAX_SLEEP_TIME 60000 #define DEF_GC_THREAD_NOGC_SLEEP_TIME 300000 /* wait 5 min */ +/* GC sleep parameters for zoned deivces */ +#define DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED 10 +#define DEF_GC_THREAD_MAX_SLEEP_TIME_ZONED 20 +#define DEF_GC_THREAD_NOGC_SLEEP_TIME_ZONED 60000 + /* choose candidates from sections which has age of more than 7 days */ #define DEF_GC_THREAD_AGE_THRESHOLD (60 * 60 * 24 * 7) #define DEF_GC_THREAD_CANDIDATE_RATIO 20 /* select 20% oldest sections as candidates */ @@ -25,6 +30,10 @@ #define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */ #define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */ +#define LIMIT_NO_ZONED_GC 60 /* percentage over total user space of no gc for zoned devices */ +#define LIMIT_BOOST_ZONED_GC 25 /* percentage over total user space of boosted gc for zoned devices */ +#define DEF_MIGRATION_GRANULARITY_ZONED 3 + #define DEF_GC_FAILED_PINNED_FILES 2048 #define MAX_GC_FAILED_PINNED_FILES USHRT_MAX @@ -152,6 +161,12 @@ static inline void decrease_sleep_time(struct f2fs_gc_kthread *gc_th, *wait -= min_time; } +static inline bool has_enough_free_blocks(struct f2fs_sb_info *sbi, + unsigned int limit_perc) +{ + return free_sections(sbi) > ((sbi->total_sections * limit_perc) / 100); +} + static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi) { block_t user_block_count = sbi->user_block_count; @@ -167,3 +182,10 @@ static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi) free_user_blocks(sbi) < limit_free_user_blocks(invalid_user_blocks)); } + +static inline bool need_to_boost_gc(struct f2fs_sb_info *sbi) +{ + if (f2fs_sb_has_blkzoned(sbi)) + return !has_enough_free_blocks(sbi, LIMIT_BOOST_ZONED_GC); + return has_enough_invalid_blocks(sbi); +} diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 3959fd137cc9..790ec9d030c9 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -707,6 +707,11 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) if (!strcmp(name, "on")) { F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; } else if (!strcmp(name, "off")) { + if (f2fs_sb_has_blkzoned(sbi)) { + f2fs_warn(sbi, "zoned devices need bggc"); + kfree(name); + return -EINVAL; + } F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF; } else if (!strcmp(name, "sync")) { F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC; @@ -3785,7 +3790,8 @@ static void init_sb_info(struct f2fs_sb_info *sbi) sbi->next_victim_seg[BG_GC] = NULL_SEGNO; sbi->next_victim_seg[FG_GC] = NULL_SEGNO; sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; - sbi->migration_granularity = SEGS_PER_SEC(sbi); + sbi->migration_granularity = f2fs_sb_has_blkzoned(sbi) ? + DEF_MIGRATION_GRANULARITY_ZONED : SEGS_PER_SEC(sbi); sbi->seq_file_ra_mul = MIN_RA_MUL; sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE; sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;