For extreme case: 10 section, op = 10%, no_fggc_threshold = 90% All section usage: 85% 85% 85% 85% 90% 90% 95% 95% 95% 95%
During foreground GC, if we skip select dirty section whose usage is larger than no_fggc_threshold, we can only recycle 80% invalid space from four 85% usage sections and two 90% usage sections, result in encountering out-of-space issue. This reverts commit e93b9865251a0503d83fd570e7d5a7c8bc351715 to fix this issue, besides, we keep the logic that we scan all dirty section when searching a victim, so that GC can select victim with least valid blocks. Signed-off-by: Chao Yu <[email protected]> --- fs/f2fs/f2fs.h | 3 --- fs/f2fs/gc.c | 16 ---------------- fs/f2fs/segment.h | 9 --------- 3 files changed, 28 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 64e3677998d8..9f8b327272df 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1192,9 +1192,6 @@ struct f2fs_sb_info { struct f2fs_gc_kthread *gc_thread; /* GC thread */ unsigned int cur_victim_sec; /* current victim section num */ - /* threshold for converting bg victims for fg */ - u64 fggc_threshold; - /* threshold for gc trials on pinned files */ u64 gc_pin_file_threshold; diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 3134dd781252..62eba4a71123 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -263,10 +263,6 @@ static unsigned int check_bg_victims(struct f2fs_sb_info *sbi) for_each_set_bit(secno, dirty_i->victim_secmap, MAIN_SECS(sbi)) { if (sec_usage_check(sbi, secno)) continue; - - if (no_fggc_candidate(sbi, secno)) - continue; - clear_bit(secno, dirty_i->victim_secmap); return GET_SEG_FROM_SEC(sbi, secno); } @@ -406,9 +402,6 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi, goto next; if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap)) goto next; - if (gc_type == FG_GC && p.alloc_mode == LFS && - no_fggc_candidate(sbi, secno)) - goto next; cost = get_gc_cost(sbi, segno, &p); @@ -1152,17 +1145,8 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, void build_gc_manager(struct f2fs_sb_info *sbi) { - u64 main_count, resv_count, ovp_count; - DIRTY_I(sbi)->v_ops = &default_v_ops; - /* threshold of # of valid blocks in a section for victims of FG_GC */ - main_count = SM_I(sbi)->main_segments << sbi->log_blocks_per_seg; - resv_count = SM_I(sbi)->reserved_segments << sbi->log_blocks_per_seg; - ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; - - sbi->fggc_threshold = div64_u64((main_count - ovp_count) * - BLKS_PER_SEC(sbi), (main_count - resv_count)); sbi->gc_pin_file_threshold = DEF_GC_FAILED_PINNED_FILES; /* give warm/cold data area from slower device */ diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 7702b054689c..c385daabcb67 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -774,15 +774,6 @@ static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type) - (base + 1) + type; } -static inline bool no_fggc_candidate(struct f2fs_sb_info *sbi, - unsigned int secno) -{ - if (get_valid_blocks(sbi, GET_SEG_FROM_SEC(sbi, secno), true) > - sbi->fggc_threshold) - return true; - return false; -} - static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno) { if (IS_CURSEC(sbi, secno) || (sbi->cur_victim_sec == secno)) -- 2.15.0.55.gc2ece9dc4de6 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
