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f2fs: add proc entry to show discard_plist info 

This patch adds a new proc entry to show discard_plist
information in more detail, which is very helpful to
know the discard pend list count clearly.

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 <frank.li@vivo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yangtao Li 2022-10-25 21:26:38 +08:00 committed by Jaegeuk Kim
parent e6ecb14242
commit 225d6795ab
1 changed files with 41 additions and 0 deletions
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41
fs/f2fs/sysfs.c
View File

@ -1252,6 +1252,44 @@ 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;
@ -1322,6 +1360,8 @@ 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:
@ -1345,6 +1385,7 @@ 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);
}