f2fs: fix out-of free segments
This patch also reverts d0db7703ac
("f2fs: do SSR in higher priority").
This patch fixes out of free segments caused by many small file creation by
1) mkfs -s 1 2G
2) mount
3) untar
- preoduce 60000 small files burstly
4) sync
- flush node pages
- flush imeta
Here, when we do f2fs_balance_fs, we missed # of imeta blocks, resulting in
skipping to check has_not_enough_free_secs.
Another test is done by
1) mkfs -s 12 2G
2) mount
3) untar
- preoduce 60000 small files burstly
4) sync
- flush node pages
- flush imeta
In this case, this patch also fixes wrong block allocation under large section
size.
Reported-by: William Brana <wbrana@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
parent
29fa6c5678
commit
a788189305
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@ -1472,7 +1472,8 @@ out:
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}
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unlock_page(page);
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f2fs_balance_fs(sbi, need_balance_fs);
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if (!S_ISDIR(inode->i_mode))
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f2fs_balance_fs(sbi, need_balance_fs);
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if (unlikely(f2fs_cp_error(sbi))) {
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f2fs_submit_merged_bio(sbi, DATA, WRITE);
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@ -338,7 +338,8 @@ int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
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* We need to balance fs here to prevent from producing dirty node pages
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* during the urgent cleaning time when runing out of free sections.
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*/
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if (update_inode_page(inode) && wbc && wbc->nr_to_write)
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update_inode_page(inode);
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if (wbc && wbc->nr_to_write)
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f2fs_balance_fs(sbi, true);
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return 0;
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}
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@ -388,11 +388,8 @@ void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
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}
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#endif
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if (!need)
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return;
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/* balance_fs_bg is able to be pending */
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if (excess_cached_nats(sbi))
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if (need && excess_cached_nats(sbi))
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f2fs_balance_fs_bg(sbi);
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/*
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@ -1639,6 +1636,17 @@ static void write_current_sum_page(struct f2fs_sb_info *sbi,
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f2fs_put_page(page, 1);
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}
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static int is_next_segment_free(struct f2fs_sb_info *sbi, int type)
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{
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struct curseg_info *curseg = CURSEG_I(sbi, type);
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unsigned int segno = curseg->segno + 1;
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struct free_segmap_info *free_i = FREE_I(sbi);
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if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec)
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return !test_bit(segno, free_i->free_segmap);
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return 0;
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}
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/*
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* Find a new segment from the free segments bitmap to right order
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* This function should be returned with success, otherwise BUG
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@ -1752,6 +1760,10 @@ static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
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static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
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{
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/* if segs_per_sec is large than 1, we need to keep original policy. */
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if (sbi->segs_per_sec != 1)
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return CURSEG_I(sbi, type)->segno;
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if (type == CURSEG_HOT_DATA || IS_NODESEG(type))
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return 0;
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@ -1901,17 +1913,21 @@ static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
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static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
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int type, bool force)
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{
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struct curseg_info *curseg = CURSEG_I(sbi, type);
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if (force)
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new_curseg(sbi, type, true);
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else if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
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type == CURSEG_WARM_NODE)
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new_curseg(sbi, type, false);
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else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
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new_curseg(sbi, type, false);
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else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
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change_curseg(sbi, type, true);
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else
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new_curseg(sbi, type, false);
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stat_inc_seg_type(sbi, CURSEG_I(sbi, type));
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stat_inc_seg_type(sbi, curseg);
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}
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void allocate_new_segments(struct f2fs_sb_info *sbi)
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