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Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9f5468fb06da..6583aee5177f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -515,8 +515,10 @@ static void ext4_put_super(struct super_block *sb)
mark_buffer_dirty(sbi->s_sbh);
ext4_commit_super(sb, es, 1);
}
- if (sbi->s_proc)
+ if (sbi->s_proc) {
+ remove_proc_entry("inode_readahead_blks", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
+ }
for (i = 0; i < sbi->s_gdb_count; i++)
brelse(sbi->s_group_desc[i]);
@@ -779,6 +781,10 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)
seq_puts(seq, ",data=writeback");
+ if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS)
+ seq_printf(seq, ",inode_readahead_blks=%u",
+ sbi->s_inode_readahead_blks);
+
ext4_show_quota_options(seq, sb);
return 0;
}
@@ -913,6 +919,7 @@ enum {
Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version,
Opt_mballoc, Opt_nomballoc, Opt_stripe, Opt_delalloc, Opt_nodelalloc,
+ Opt_inode_readahead_blks
};
static match_table_t tokens = {
@@ -973,6 +980,7 @@ static match_table_t tokens = {
{Opt_resize, "resize"},
{Opt_delalloc, "delalloc"},
{Opt_nodelalloc, "nodelalloc"},
+ {Opt_inode_readahead_blks, "inode_readahead_blks=%u"},
{Opt_err, NULL},
};
@@ -1381,6 +1389,13 @@ set_qf_format:
case Opt_delalloc:
set_opt(sbi->s_mount_opt, DELALLOC);
break;
+ case Opt_inode_readahead_blks:
+ if (match_int(&args[0], &option))
+ return 0;
+ if (option < 0 || option > (1 << 30))
+ return 0;
+ sbi->s_inode_readahead_blks = option;
+ break;
default:
printk(KERN_ERR
"EXT4-fs: Unrecognized mount option \"%s\" "
@@ -1938,6 +1953,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_mount_opt = 0;
sbi->s_resuid = EXT4_DEF_RESUID;
sbi->s_resgid = EXT4_DEF_RESGID;
+ sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
sbi->s_sb_block = sb_block;
unlock_kernel();
@@ -2234,6 +2250,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
if (ext4_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);
+ if (sbi->s_proc)
+ proc_create_data("inode_readahead_blks", 0644, sbi->s_proc,
+ &ext4_ui_proc_fops,
+ &sbi->s_inode_readahead_blks);
+
bgl_lock_init(&sbi->s_blockgroup_lock);
for (i = 0; i < db_count; i++) {
@@ -2513,8 +2534,10 @@ failed_mount2:
brelse(sbi->s_group_desc[i]);
kfree(sbi->s_group_desc);
failed_mount:
- if (sbi->s_proc)
+ if (sbi->s_proc) {
+ remove_proc_entry("inode_readahead_blks", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
+ }
#ifdef CONFIG_QUOTA
for (i = 0; i < MAXQUOTAS; i++)
kfree(sbi->s_qf_names[i]);