[PATCH V1 0/8] reduce the size of rnbd_clt_dev

[Guoqing Jiang <guoqing.jiang@linux.dev>]

From: Guoqing Jiang <guoqing.jiang@suse.com>

Changes since RFC:

1. Fix one mistake in the last patch of RFC version, and split it to
   three patches.

2. Collect Acked-by tags from Jinpu.

Hi,

The struct rnbd_clt_dev added some members (wc, fua and max_hw_sectors
etc) which are used to set up gendisk and request_queue, but seems only
map scenario need to setup them since rnbd_client_setup_device is not
called from remap path.

Previously, pahole reports.

	/* size: 272, cachelines: 5, members: 29 */
	/* sum members: 259, holes: 4, sum holes: 13 */
	/* last cacheline: 16 bytes */

After the series, it changes to

	/* size: 224, cachelines: 4, members: 17 */
	/* last cacheline: 32 bytes */

Please review.

Thanks,
Guoqing

Guoqing Jiang (8):
  rnbd-clt: open code send_msg_open in rnbd_clt_map_device
  rnbd-clt: don't free rsp in msg_open_conf for map scenario
  rnbd-clt: kill read_only from struct rnbd_clt_dev
  rnbd-clt: reduce the size of struct rnbd_clt_dev
  rnbd-clt: adjust the layout of struct rnbd_clt_dev
  rnbd-clt: check capacity inside rnbd_clt_change_capacity
  rnbd-clt: pass sector_t type for resize capacity
  rnbd-clt: make rnbd_clt_change_capacity return void

 drivers/block/rnbd/rnbd-clt-sysfs.c |   2 +-
 drivers/block/rnbd/rnbd-clt.c       | 201 ++++++++++++++++------------
 drivers/block/rnbd/rnbd-clt.h       |  18 +--
 3 files changed, 123 insertions(+), 98 deletions(-)

-- 
2.34.1