diff options
| author | Yunlong Song <yunlong.song@huawei.com> | 2018-07-23 22:10:22 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-08-01 11:52:36 -0700 |
| commit | 970e348d9829e9fc3091da2fe189ab34a07201e6 (patch) | |
| tree | 799222833d1de4f7f0170eb4011ef4865c677008 /fs/f2fs | |
| parent | fd8c8caf7e7c8261a92ce0f7f2cd0adb8afd9e0d (diff) | |
| download | linux-0-day-970e348d9829e9fc3091da2fe189ab34a07201e6.tar.gz linux-0-day-970e348d9829e9fc3091da2fe189ab34a07201e6.tar.xz | |
f2fs: add proc entry to show victim_secmap bitmap
This patch adds a new proc entry to show victim_secmap information in
more detail, which is very helpful to know the get_victim candidate
status clearly, and helpful to debug problems (e.g., some sections can
not gc all of its blocks, since some blocks belong to atomic file,
leaving victim_secmap with section bit setting, in extrem case, this
will lead all bytes of victim_secmap setting with 0xff).
Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/sysfs.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index bca1236fd6fa9..f22782a0defe6 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -615,6 +615,28 @@ static int __maybe_unused iostat_info_seq_show(struct seq_file *seq, return 0; } +static int __maybe_unused victim_bits_seq_show(struct seq_file *seq, + void *offset) +{ + struct super_block *sb = seq->private; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + int i; + + seq_puts(seq, "format: victim_secmap bitmaps\n"); + + for (i = 0; i < MAIN_SECS(sbi); i++) { + if ((i % 10) == 0) + seq_printf(seq, "%-10d", i); + seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0); + if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1)) + seq_putc(seq, '\n'); + else + seq_putc(seq, ' '); + } + return 0; +} + int __init f2fs_init_sysfs(void) { int ret; @@ -664,6 +686,8 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi) segment_bits_seq_show, sb); proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc, iostat_info_seq_show, sb); + proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc, + victim_bits_seq_show, sb); } return 0; } @@ -674,6 +698,7 @@ void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) remove_proc_entry("iostat_info", sbi->s_proc); remove_proc_entry("segment_info", sbi->s_proc); remove_proc_entry("segment_bits", sbi->s_proc); + remove_proc_entry("victim_bits", sbi->s_proc); remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); } kobject_del(&sbi->s_kobj); |