Messages in this thread Patch in this message | | | Date | Fri, 14 Mar 2008 18:49:06 +0800 | From | Dave Young <> | Subject | [PATCH][BUG 10227] readahead ret value fix |
| |
If the page_offset > end_index, the return value should be updated to 0, avoiding the redundant read_pages
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
--- mm/readahead.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff -upr linux/mm/readahead.c linux.new/mm/readahead.c --- linux/mm/readahead.c 2008-03-14 18:38:12.000000000 +0800 +++ linux.new/mm/readahead.c 2008-03-14 18:38:58.000000000 +0800 @@ -144,8 +144,10 @@ __do_page_cache_readahead(struct address for (page_idx = 0; page_idx < nr_to_read; page_idx++) { pgoff_t page_offset = offset + page_idx; - if (page_offset > end_index) + if (page_offset > end_index) { + ret = 0; break; + } rcu_read_lock(); page = radix_tree_lookup(&mapping->page_tree, page_offset);
| |