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| author | Fengguang Wu <wfg@mail.ustc.edu.cn> | 2007-10-16 01:24:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:52 -0700 |
| commit | 937085aa35cc873d427d250a1e304d641af24628 (patch) | |
| tree | 99b0d2d9e6721a72e65b4cb5ad0fc30ec04f4aa2 | |
| parent | 43fac94dd62667c83dd2daa5b7ac548512af780a (diff) | |
| download | kernel-common-937085aa35cc873d427d250a1e304d641af24628.tar.gz kernel-common-937085aa35cc873d427d250a1e304d641af24628.tar.bz2 kernel-common-937085aa35cc873d427d250a1e304d641af24628.zip | |
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>
| -rw-r--r-- | include/linux/fs.h | 8 | ||||
| -rw-r--r-- | mm/readahead.c | 2 |
2 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 4a6a21077bae..7a998c49a086 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 */ diff --git a/mm/readahead.c b/mm/readahead.c index be20c9d699d3..d2504877b269 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -351,7 +351,7 @@ ondemand_readahead(struct address_space *mapping, 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; |