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| author | Fengguang Wu <wfg@mail.ustc.edu.cn> | 2007-10-16 01:24:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:52 -0700 |
| commit | 535443f51543df61111bbd234300ae549d220448 (patch) | |
| tree | e9b022969776132b9fd3bde351673edc006a1bac | |
| parent | 7ff81078d8b9f3d05a27b7bd3786ffb1ef1b0d1f (diff) | |
| download | linux-535443f51543df61111bbd234300ae549d220448.tar.gz linux-535443f51543df61111bbd234300ae549d220448.tar.bz2 linux-535443f51543df61111bbd234300ae549d220448.zip | |
readahead: remove several readahead macros
Remove VM_MAX_CACHE_HIT, MAX_RA_PAGES and MIN_RA_PAGES.
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/mm.h | 2 | ||||
| -rw-r--r-- | mm/readahead.c | 10 |
2 files changed, 1 insertions, 11 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index fbff8e481cc4..291c4cc06ea7 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1106,8 +1106,6 @@ int write_one_page(struct page *page, int wait); /* readahead.c */ #define VM_MAX_READAHEAD 128 /* kbytes */ #define VM_MIN_READAHEAD 16 /* kbytes (includes current page) */ -#define VM_MAX_CACHE_HIT 256 /* max pages in a row in cache before - * turning readahead off */ int do_page_cache_readahead(struct address_space *mapping, struct file *filp, pgoff_t offset, unsigned long nr_to_read); diff --git a/mm/readahead.c b/mm/readahead.c index fd588ffc5086..fc52f9f1b80c 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -22,16 +22,8 @@ void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) } EXPORT_SYMBOL(default_unplug_io_fn); -/* - * Convienent macros for min/max read-ahead pages. - * Note that MAX_RA_PAGES is rounded down, while MIN_RA_PAGES is rounded up. - * The latter is necessary for systems with large page size(i.e. 64k). - */ -#define MAX_RA_PAGES (VM_MAX_READAHEAD*1024 / PAGE_CACHE_SIZE) -#define MIN_RA_PAGES DIV_ROUND_UP(VM_MIN_READAHEAD*1024, PAGE_CACHE_SIZE) - struct backing_dev_info default_backing_dev_info = { - .ra_pages = MAX_RA_PAGES, + .ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE, .state = 0, .capabilities = BDI_CAP_MAP_COPY, .unplug_io_fn = default_unplug_io_fn, |