[PATCH v6 10/11] VFS hot tracking, xfs: Add hot tracking support

Zhi Yong Wu
2013-11-06T13:49:46Z

From: Dave Chinner <dchinner@redhat.com>

Connect up the VFS hot tracking support so XFS filesystem
can make use of it.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
---
fs/xfs/xfs_mount.h | 1 +
fs/xfs/xfs_super.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 1fa0584..c6bbf31 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -184,6 +184,7 @@ typedef struct xfs_mount {
#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
must be synchronous except
for space allocations */
+#define XFS_MOUNT_HOTTRACK (1ULL << 1) /* hot tracking */
#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
operations, typically for
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 15188cc..a2667f9 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -62,6 +62,7 @@
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/parser.h>
+#include <linux/hot_tracking.h>

static const struct super_operations xfs_super_operations;
static kmem_zone_t *xfs_ioend_zone;
@@ -115,6 +116,7 @@ mempool_t *xfs_ioend_pool;
#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
#define MNTOPT_DISCARD "discard" /* Discard unused blocks */
#define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
+#define MNTOPT_HOTTRACK "hot_track" /* hot tracking */

/*
* Table driven mount option parser.
@@ -381,6 +383,8 @@ xfs_parseargs(
mp->m_flags |= XFS_MOUNT_DISCARD;
} else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
mp->m_flags &= ~XFS_MOUNT_DISCARD;
+ } else if (!strcmp(this_char, MNTOPT_HOTTRACK)) {
+ mp->m_flags |= XFS_MOUNT_HOTTRACK;
} else if (!strcmp(this_char, "ihashsize")) {
xfs_warn(mp,
"ihashsize no longer used, option is deprecated.");
@@ -504,6 +508,7 @@ xfs_showargs(
{ XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
{ XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
{ XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE },
+ { XFS_MOUNT_HOTTRACK, "," MNTOPT_HOTTRACK },
{ 0, NULL }
};
static struct proc_xfs_info xfs_info_unset[] = {
@@ -1046,6 +1051,9 @@ xfs_fs_put_super(
{
struct xfs_mount *mp = XFS_M(sb);

+ if (mp->m_flags & XFS_MOUNT_HOTTRACK)
+ hot_track_exit(sb);
+
xfs_filestream_unmount(mp);
xfs_unmountfs(mp);

@@ -1501,8 +1509,18 @@ xfs_fs_fill_super(
goto out_unmount;
}

+ if (mp->m_flags & XFS_MOUNT_HOTTRACK) {
+ error = hot_track_init(sb);
+ if (error)
+ goto out_free_root;
+ }
+
return 0;

+ out_free_root:
+ dput(sb->s_root);
+ sb->s_root = NULL;
+
out_filestream_unmount:
xfs_filestream_unmount(mp);
out_free_sb:
--
1.7.11.7