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| author | Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> | 2013-07-04 19:04:01 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-04 11:22:46 -0700 |
| commit | 275f495dbe34300d793466a7d96c70f83fbae1bc (patch) | |
| tree | 75785e0623188c52360f845419354b3b7cd67051 /fs/hpfs/hpfs_fn.h | |
| parent | a0c1b7596323a2323d5f5c7d2404af7b58a1ef4e (diff) | |
| download | linux-275f495dbe34300d793466a7d96c70f83fbae1bc.tar.bz2 | |
hpfs: implement prefetch to improve performance
This patch implements prefetch to improve performance. It helps mostly
when scanning the bitmaps to calculate free space.
Signed-off-by: Mikulas Patocka <mpatocka@artax.karlin.mff.cuni.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hpfs/hpfs_fn.h')
| -rw-r--r-- | fs/hpfs/hpfs_fn.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h index b7ae286646b5..1b398636e990 100644 --- a/fs/hpfs/hpfs_fn.h +++ b/fs/hpfs/hpfs_fn.h @@ -27,8 +27,9 @@ #define ALLOC_FWD_MAX 128 #define ALLOC_M 1 #define FNODE_RD_AHEAD 16 -#define ANODE_RD_AHEAD 16 -#define DNODE_RD_AHEAD 4 +#define ANODE_RD_AHEAD 0 +#define DNODE_RD_AHEAD 72 +#define COUNT_RD_AHEAD 62 #define FREE_DNODES_ADD 58 #define FREE_DNODES_DEL 29 @@ -207,6 +208,7 @@ void hpfs_remove_fnode(struct super_block *, fnode_secno fno); /* buffer.c */ +void hpfs_prefetch_sectors(struct super_block *, unsigned, int); void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int); void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **); void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int); @@ -271,6 +273,7 @@ void hpfs_evict_inode(struct inode *); __le32 *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *); __le32 *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *); +void hpfs_prefetch_bitmap(struct super_block *, unsigned); unsigned char *hpfs_load_code_page(struct super_block *, secno); __le32 *hpfs_load_bitmap_directory(struct super_block *, secno bmp); struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **); |