diff options
| -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, |