[RFC v4+ hot_track 18/19] ext4: add hot tracking support
From: <hidden>
Date: 2012-10-29 04:31:00
Also in:
linux-btrfs, linux-fsdevel, lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
From: Zheng Liu <redacted> Define a new mount option to add VFS hot tracking support in order to use it in ext4. CC: Zhi Yong Wu <redacted> Signed-off-by: Zheng Liu <redacted> --- fs/ext4/ext4.h | 3 +++ fs/ext4/super.c | 13 ++++++++++++- 2 files changed, 15 insertions(+), 1 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 3c20de1..f6cff1e 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h@@ -1298,6 +1298,9 @@ struct ext4_sb_info { /* Precomputed FS UUID checksum for seeding other checksums */ __u32 s_csum_seed; + + /* Enable hot tracking or not */ + int s_hottrack_enable; }; static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 80928f7..ba9f376 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c@@ -864,6 +864,8 @@ static void ext4_put_super(struct super_block *sb) ext4_ext_release(sb); ext4_xattr_put_super(sb); + if (sbi->s_hottrack_enable) + hot_track_exit(sb); if (!(sb->s_flags & MS_RDONLY)) { EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); es->s_state = cpu_to_le16(sbi->s_mount_state);
@@ -1222,7 +1224,7 @@ enum { Opt_inode_readahead_blks, Opt_journal_ioprio, Opt_dioread_nolock, Opt_dioread_lock, Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, - Opt_max_dir_size_kb, + Opt_max_dir_size_kb, Opt_hottrack, }; static const match_table_t tokens = {
@@ -1297,6 +1299,7 @@ static const match_table_t tokens = { {Opt_init_itable, "init_itable"}, {Opt_noinit_itable, "noinit_itable"}, {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, + {Opt_hottrack, "hot_track"}, {Opt_removed, "check=none"}, /* mount option from ext2/3 */ {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ {Opt_removed, "reservation"}, /* mount option from ext2/3 */
@@ -1595,6 +1598,14 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, sbi->s_li_wait_mult = arg; } else if (token == Opt_max_dir_size_kb) { sbi->s_max_dir_size_kb = arg; + } else if (token == Opt_hottrack) { + if (hot_track_init(sb)) { + ext4_msg(sb, KERN_ERR, + "EXT4-fs: hot tracking initialization" + " failed"); + return -1; + } + sbi->s_hottrack_enable = 1; } else if (token == Opt_stripe) { sbi->s_stripe = arg; } else if (m->flags & MOPT_DATAJ) {
--
1.7.6.5