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;
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
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;
/*