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f2fs: allocate node and hot data in the beginning of partition

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In order to give more spatial locality, this patch changes the block allocation
policy which assigns beginning of partition for small and hot data/node blocks.
In order to do this, we set noheap allocation by default and introduce another
mount option, heap, to reset it back.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2017-03-24 20:41:45 -04:00
parent c541a51b8c
commit 7a20b8a61e
3 changed files with 23 additions and 2 deletions
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10
fs/f2fs/super.c
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@@ -83,6 +83,7 @@ enum {
Opt_discard,
Opt_nodiscard,
Opt_noheap,
Opt_heap,
Opt_user_xattr,
Opt_nouser_xattr,
Opt_acl,
@@ -117,6 +118,7 @@ static match_table_t f2fs_tokens = {
{Opt_discard, "discard"},
{Opt_nodiscard, "nodiscard"},
{Opt_noheap, "no_heap"},
{Opt_heap, "heap"},
{Opt_user_xattr, "user_xattr"},
{Opt_nouser_xattr, "nouser_xattr"},
{Opt_acl, "acl"},
@@ -437,6 +439,9 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_noheap:
set_opt(sbi, NOHEAP);
break;
case Opt_heap:
clear_opt(sbi, NOHEAP);
break;
#ifdef CONFIG_F2FS_FS_XATTR
case Opt_user_xattr:
set_opt(sbi, XATTR_USER);
@@ -914,7 +919,9 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
if (test_opt(sbi, DISCARD))
seq_puts(seq, ",discard");
if (test_opt(sbi, NOHEAP))
seq_puts(seq, ",no_heap_alloc");
seq_puts(seq, ",no_heap");
else
seq_puts(seq, ",heap");
#ifdef CONFIG_F2FS_FS_XATTR
if (test_opt(sbi, XATTR_USER))
seq_puts(seq, ",user_xattr");
@@ -1047,6 +1054,7 @@ static void default_options(struct f2fs_sb_info *sbi)
set_opt(sbi, INLINE_DATA);
set_opt(sbi, INLINE_DENTRY);
set_opt(sbi, EXTENT_CACHE);
set_opt(sbi, NOHEAP);
sbi->sb->s_flags |= MS_LAZYTIME;
set_opt(sbi, FLUSH_MERGE);
if (f2fs_sb_mounted_blkzoned(sbi->sb)) {