diff options
| author |   Alexey Dobriyan <adobriyan@gmail.com> | 2007-05-08 00:24:55 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:00 -0700 |
| commit | fe08a9d4982d9618ec25760ea715c46fe051e508 (patch) | |
| tree | 6535cfaf206d19cb0a5e09192f49b37e91ba6232 | |
| parent | Apple SMC driver (hardware monitoring and control) (diff) | |
| download | linux-dev-fe08a9d4982d9618ec25760ea715c46fe051e508.tar.xz linux-dev-fe08a9d4982d9618ec25760ea715c46fe051e508.zip | |
reiserfs: shrink superblock if no xattrs
This makes in-core superblock fit into one cacheline here.
Before:
struct dentry * xattr_root; /* 124 4 */
/* --- cacheline 1 boundary (128 bytes) --- */
struct rw_semaphore xattr_dir_sem; /* 128 12 */
int j_errno; /* 140 4 */
}; /* size: 144, cachelines: 2 */
/* sum members: 142, holes: 1, sum holes: 2 */
/* last cacheline: 16 bytes */
After:
int j_errno; /* 124 4 */
/* --- cacheline 1 boundary (128 bytes) --- */
}; /* size: 128, cachelines: 1 */
/* sum members: 126, holes: 1, sum holes: 2 */
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: <reiserfs-dev@namesys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/reiserfs/super.c | 6 | ||||
| -rw-r--r-- | include/linux/reiserfs_fs_sb.h | 3 |
2 files changed, 6 insertions, 3 deletions
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 7054aaef0493..5c58b419f4ee 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -433,12 +433,13 @@ int remove_save_link(struct inode *inode, int truncate) static void reiserfs_kill_sb(struct super_block *s) { if (REISERFS_SB(s)) { +#ifdef CONFIG_REISERFS_FS_XATTR if (REISERFS_SB(s)->xattr_root) { d_invalidate(REISERFS_SB(s)->xattr_root); dput(REISERFS_SB(s)->xattr_root); REISERFS_SB(s)->xattr_root = NULL; } - +#endif if (REISERFS_SB(s)->priv_root) { d_invalidate(REISERFS_SB(s)->priv_root); dput(REISERFS_SB(s)->priv_root); @@ -1562,9 +1563,10 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) REISERFS_SB(s)->s_alloc_options.preallocmin = 0; /* Preallocate by 16 blocks (17-1) at once */ REISERFS_SB(s)->s_alloc_options.preallocsize = 17; +#ifdef CONFIG_REISERFS_FS_XATTR /* Initialize the rwsem for xattr dir */ init_rwsem(&REISERFS_SB(s)->xattr_dir_sem); - +#endif /* setup default block allocator options */ reiserfs_init_alloc_options(s); diff --git a/include/linux/reiserfs_fs_sb.h b/include/linux/reiserfs_fs_sb.h index 3a28742d86f9..1e5488ede037 100644 --- a/include/linux/reiserfs_fs_sb.h +++ b/include/linux/reiserfs_fs_sb.h @@ -401,9 +401,10 @@ struct reiserfs_sb_info { int reserved_blocks; /* amount of blocks reserved for further allocations */ spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */ struct dentry *priv_root; /* root of /.reiserfs_priv */ +#ifdef CONFIG_REISERFS_FS_XATTR struct dentry *xattr_root; /* root of /.reiserfs_priv/.xa */ struct rw_semaphore xattr_dir_sem; - +#endif int j_errno; #ifdef CONFIG_QUOTA char *s_qf_names[MAXQUOTAS]; |