Hi, Hi I am checking if device-mapper breaks down the reads/writes which are sent by the file system. For example if an FS like Lustre sends a 1MB read/write whether the request goes to the disk as a single request or is it broken down into many small requests. I have put some printks in __map_bio, __split_bio, etc. It seems that even though 1 MB writes are sent to the device mapper the bios that are sent to generic_make_request in __map_bio are at max 8k in size. In function max_io_len(), ti->split_io is just 16 sectors at max, hich is why the requests get broken down. Why is this ->split_io variable set to 16 sectors? Can it be more (arnd 2048 sectors) without affecting the stability? Thanks, Kalpak. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
