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authorFengguang Wu <wfg@mail.ustc.edu.cn>2007-10-16 01:24:31 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:42:52 -0700
commit937085aa35cc873d427d250a1e304d641af24628 (patch)
tree99b0d2d9e6721a72e65b4cb5ad0fc30ec04f4aa2 /include
parent43fac94dd62667c83dd2daa5b7ac548512af780a (diff)
downloadop-kernel-dev-937085aa35cc873d427d250a1e304d641af24628.zip
op-kernel-dev-937085aa35cc873d427d250a1e304d641af24628.tar.gz
readahead: compacting file_ra_state
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 <andi@firstfloor.org> Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn> 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.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4a6a210..7a998c4 100644
--- a/include/linux/fs.h
+++ b/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 */
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