diff options
Diffstat (limited to 'mm/readahead.c')
| -rw-r--r-- | mm/readahead.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c index 7f9bf588c93..072ce8f8357 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -592,3 +592,22 @@ unsigned long max_sane_readahead(unsigned long nr) return min(nr, (node_page_state(numa_node_id(), NR_INACTIVE) + node_page_state(numa_node_id(), NR_FREE_PAGES)) / 2); } + +/* + * Submit IO for the read-ahead request in file_ra_state. + */ +unsigned long ra_submit(struct file_ra_state *ra, + struct address_space *mapping, struct file *filp) +{ + unsigned long ra_size; + unsigned long la_size; + int actual; + + ra_size = ra_readahead_size(ra); + la_size = ra_lookahead_size(ra); + actual = __do_page_cache_readahead(mapping, filp, + ra->ra_index, ra_size, la_size); + + return actual; +} +EXPORT_SYMBOL_GPL(ra_submit); |