[3/6] direct-io: do not merge logically non-contiguous requests

Commit Message

Josef Bacik May 19, 2010, 8:24 p.m. UTC

None

Patch

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 21ec032..03a3ed4 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -623,10 +623,15 @@  static int dio_send_cur_page(struct dio *dio)
 	int ret = 0;
 
 	if (dio->bio) {
+		loff_t cur_offset = dio->block_in_file << dio->blkbits;
+		loff_t bio_next_offset = dio->logical_offset_in_bio +
+			dio->bio->bi_size;
+
 		/*
 		 * See whether this new request is contiguous with the old
 		 */
-		if (dio->final_block_in_bio != dio->cur_page_block)
+		if (dio->final_block_in_bio != dio->cur_page_block ||
+		    cur_offset != bio_next_offset)
 			dio_bio_submit(dio);
 		/*
 		 * Submit now if the underlying fs is about to perform a