bio size can grow up to 4GB after muli-page bvec has been enabled. But sometimes large size of bio would lead to inefficient behaviors. Control of bio max size will be helpful to improve inefficiency. blk_queue_max_bio_bytes() is added to enable be set the max_bio_bytes in each driver layer. And max_bio_bytes sysfs is added to show current max_bio_bytes for each request queue. bio size can be controlled via max_bio_bytes. Changheun Lee (3): bio: control bio max size blk-sysfs: add max_bio_bytes scsi: set max_bio_bytes with queue max sectors Documentation/ABI/testing/sysfs-block | 10 ++++++++++ Documentation/block/queue-sysfs.rst | 7 +++++++ block/bio.c | 17 ++++++++++++++--- block/blk-settings.c | 19 +++++++++++++++++++ block/blk-sysfs.c | 7 +++++++ drivers/scsi/scsi_lib.c | 2 ++ include/linux/bio.h | 4 +++- include/linux/blkdev.h | 3 +++ 8 files changed, 65 insertions(+), 4 deletions(-) -- 2.29.0
