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authorFengguang Wu <wfg@mail.ustc.edu.cn>2007-07-19 01:48:04 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 10:04:44 -0700
commitc743d96b6d2ff55a94df7b5ac7c74987bb9c343b (patch)
tree391e5dad21e62590e343c63e5ba05322d0fc76ad /include
parentdc7868fcb9a73990e6f30371c1be465c436a7a7f (diff)
readahead: remove the old algorithm
Remove the old readahead algorithm. Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn> Cc: Steven Pratt <slpratt@austin.ibm.com> Cc: Ram Pai <linuxram@us.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/fs.h11
-rw-r--r--include/linux/mm.h7
2 files changed, 1 insertions, 17 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9a5f562abc7..29cb32d3a84 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -701,14 +701,6 @@ struct fown_struct {
* file_ra_state.la_index .ra_index .lookahead_index .readahead_index
*/
struct file_ra_state {
- unsigned long start; /* Current window */
- unsigned long size;
- unsigned long flags; /* ra flags RA_FLAG_xxx*/
- unsigned long cache_hit; /* cache hit count*/
- unsigned long prev_index; /* Cache last read() position */
- unsigned long ahead_start; /* Ahead window */
- unsigned long ahead_size;
-
pgoff_t la_index; /* enqueue time */
pgoff_t ra_index; /* begin offset */
pgoff_t lookahead_index; /* time to do next readahead */
@@ -717,10 +709,9 @@ struct file_ra_state {
unsigned long ra_pages; /* Maximum readahead window */
unsigned long mmap_hit; /* Cache hit stat for mmap accesses */
unsigned long mmap_miss; /* Cache miss stat for mmap accesses */
+ unsigned long prev_index; /* Cache last read() position */
unsigned int prev_offset; /* Offset where last read() ended in a page */
};
-#define RA_FLAG_MISS 0x01 /* a cache miss occured against this file */
-#define RA_FLAG_INCACHE 0x02 /* file is already in cache */
/*
* Measuring read-ahead sizes.
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 619c0e80cf0..3d0d7d28523 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1144,13 +1144,6 @@ unsigned long page_cache_readahead_ondemand(struct address_space *mapping,
struct page *page,
pgoff_t offset,
unsigned long size);
-unsigned long page_cache_readahead(struct address_space *mapping,
- struct file_ra_state *ra,
- struct file *filp,
- pgoff_t offset,
- unsigned long size);
-void handle_ra_miss(struct address_space *mapping,
- struct file_ra_state *ra, pgoff_t offset);
unsigned long max_sane_readahead(unsigned long nr);
/* Do stack extension */