Use 'unsigned int' instead of 'unsigned long' for readahead sizes.
This helps reduce memory consumption on 64bit CPU when
a lot of files are opened.
CC: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Fengguang Wu <[EMAIL PROTECTED]>
---
include/linux/fs.h | 8 ++++----
mm/readahead.c | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
--- linux-2.6.22-git15.orig/include/linux/fs.h
+++ linux-2.6.22-git15/include/linux/fs.h
@@ -697,12 +697,12 @@ struct fown_struct {
* Track a single file's readahead state
*/
struct file_ra_state {
- pgoff_t start; /* where readahead started */
- unsigned long size; /* # of readahead pages */
- unsigned long async_size; /* do asynchronous readahead when
+ pgoff_t start; /* where readahead started */
+ unsigned int size; /* # of readahead pages */
+ unsigned int async_size; /* do asynchronous readahead when
there are only # of pages ahead */
- unsigned long ra_pages; /* Maximum readahead window */
+ unsigned int 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 */
--- linux-2.6.22-git15.orig/mm/readahead.c
+++ linux-2.6.22-git15/mm/readahead.c
@@ -350,7 +350,7 @@ ondemand_readahead(struct address_space
bool hit_readahead_marker, pgoff_t offset,
unsigned long req_size)
{
- unsigned long max; /* max readahead pages */
+ int max; /* max readahead pages */
int sequential;
max = ra->ra_pages;
--
-
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