diff options
Diffstat (limited to 'mm/readahead.c')
| -rw-r--r-- | mm/readahead.c | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/mm/readahead.c b/mm/readahead.c index 60cd846a9a44..ba22d7fe0afb 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -89,8 +89,8 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages, while (!list_empty(pages)) { page = list_to_page(pages); list_del(&page->lru); - if (add_to_page_cache_lru(page, mapping, - page->index, GFP_KERNEL)) { + if (add_to_page_cache_lru(page, mapping, page->index, + mapping_gfp_constraint(mapping, GFP_KERNEL))) { read_cache_pages_invalidate_page(mapping, page); continue; } @@ -127,8 +127,8 @@ static int read_pages(struct address_space *mapping, struct file *filp, for (page_idx = 0; page_idx < nr_pages; page_idx++) { struct page *page = list_to_page(pages); list_del(&page->lru); - if (!add_to_page_cache_lru(page, mapping, - page->index, GFP_KERNEL)) { + if (!add_to_page_cache_lru(page, mapping, page->index, + mapping_gfp_constraint(mapping, GFP_KERNEL))) { mapping->a_ops->readpage(filp, page); } page_cache_release(page); @@ -213,7 +213,7 @@ int force_page_cache_readahead(struct address_space *mapping, struct file *filp, if (unlikely(!mapping->a_ops->readpage && !mapping->a_ops->readpages)) return -EINVAL; - nr_to_read = max_sane_readahead(nr_to_read); + nr_to_read = min(nr_to_read, inode_to_bdi(mapping->host)->ra_pages); while (nr_to_read) { int err; @@ -232,16 +232,6 @@ int force_page_cache_readahead(struct address_space *mapping, struct file *filp, return 0; } -#define MAX_READAHEAD ((512*4096)/PAGE_CACHE_SIZE) -/* - * Given a desired number of PAGE_CACHE_SIZE readahead pages, return a - * sensible upper limit. - */ -unsigned long max_sane_readahead(unsigned long nr) -{ - return min(nr, MAX_READAHEAD); -} - /* * Set the initial window size, round to next power of 2 and square * for small size, x 4 for medium, and x 2 for large @@ -380,7 +370,7 @@ ondemand_readahead(struct address_space *mapping, bool hit_readahead_marker, pgoff_t offset, unsigned long req_size) { - unsigned long max = max_sane_readahead(ra->ra_pages); + unsigned long max = ra->ra_pages; pgoff_t prev_offset; /* |