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Diffstat (limited to 'mm/readahead.c')
-rw-r--r--mm/readahead.c18
1 files changed, 4 insertions, 14 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index 24682f6f4..ba22d7fe0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -90,7 +90,7 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
page = list_to_page(pages);
list_del(&page->lru);
if (add_to_page_cache_lru(page, mapping, page->index,
- GFP_KERNEL & mapping_gfp_mask(mapping))) {
+ mapping_gfp_constraint(mapping, GFP_KERNEL))) {
read_cache_pages_invalidate_page(mapping, page);
continue;
}
@@ -128,7 +128,7 @@ static int read_pages(struct address_space *mapping, struct file *filp,
struct page *page = list_to_page(pages);
list_del(&page->lru);
if (!add_to_page_cache_lru(page, mapping, page->index,
- GFP_KERNEL & mapping_gfp_mask(mapping))) {
+ 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;
/*