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Such as: Discard pend list(Show diacrd_cmd count on each entry, .:not exist): 0 390 156 85 67 46 37 26 14 8 17 12 9 9 6 12 11 10 16 5 9 2 4 8 3 4 1 24 3 2 2 5 2 4 5 4 32 3 3 2 3 . 3 3 1 40 . 4 1 3 2 1 2 1 48 1 . 1 1 . 1 1 . 56 . 1 1 1 . 2 . 1 64 1 2 . . . . . . 72 . 1 . . . . . . 80 3 1 . . 1 1 . . 88 1 . . . 1 . . 1 ...... Signed-off-by: Yangtao Li --- v2: -move to procfs entry fs/f2fs/sysfs.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index df27afd71ef4..0fc17375e042 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -1243,6 +1243,44 @@ static int __maybe_unused victim_bits_seq_show(struct seq_file *seq, return 0; } +static int __maybe_unused discard_plist_seq_show(struct seq_file *seq, + void *offset) +{ + struct super_block *sb = seq->private; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + int i, count; + + seq_puts(seq, "Discard pend list(Show diacrd_cmd count on each entry, .:not exist):\n"); + if (!f2fs_realtime_discard_enable(sbi)) + return 0; + + if (dcc) { + mutex_lock(&dcc->cmd_lock); + for (i = 0; i < MAX_PLIST_NUM; i++) { + struct list_head *pend_list; + struct discard_cmd *dc, *tmp; + + if (i % 8 == 0) + seq_printf(seq, " %-3d", i); + count = 0; + pend_list = &dcc->pend_list[i]; + list_for_each_entry_safe(dc, tmp, pend_list, list) + count++; + if (count) + seq_printf(seq, " %7d", count); + else + seq_puts(seq, " ."); + if (i % 8 == 7) + seq_putc(seq, '\n'); + } + seq_putc(seq, '\n'); + mutex_unlock(&dcc->cmd_lock); + } + + return 0; +} + int __init f2fs_init_sysfs(void) { int ret; @@ -1313,6 +1351,8 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi) #endif proc_create_single_data("victim_bits", 0444, sbi->s_proc, victim_bits_seq_show, sb); + proc_create_single_data("discard_plist_info", 0444, sbi->s_proc, + discard_plist_seq_show, sb); } return 0; put_feature_list_kobj: @@ -1336,6 +1376,7 @@ void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi) 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("discard_plist_info", sbi->s_proc); remove_proc_entry(sbi->sb->s_id, f2fs_proc_root); }