From: Guoqing Jiang <guoqing.jiang@linux.dev>
To: axboe@kernel.dk
Cc: haris.iqbal@ionos.com, jinpu.wang@ionos.com, linux-block@vger.kernel.org
Subject: [PATCH V2 5/8] rnbd-clt: adjust the layout of struct rnbd_clt_dev
Date: Wed, 6 Jul 2022 21:31:49 +0800 [thread overview]
Message-ID: <20220706133152.12058-6-guoqing.jiang@linux.dev> (raw)
In-Reply-To: <20220706133152.12058-1-guoqing.jiang@linux.dev>
While at it, let re-arrange the struct to remove holes.
Before, pahole reports
/* size: 232, cachelines: 4, members: 17 */
/* sum members: 224, holes: 2, sum holes: 8 */
/* last cacheline: 40 bytes */
After the change, the report changes to
/* size: 224, cachelines: 4, members: 17 */
/* last cacheline: 32 bytes */
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
---
drivers/block/rnbd/rnbd-clt.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/rnbd/rnbd-clt.h b/drivers/block/rnbd/rnbd-clt.h
index 7520272541b1..df237d2ea0d9 100644
--- a/drivers/block/rnbd/rnbd-clt.h
+++ b/drivers/block/rnbd/rnbd-clt.h
@@ -106,6 +106,7 @@ struct rnbd_queue {
};
struct rnbd_clt_dev {
+ struct kobject kobj;
struct rnbd_clt_session *sess;
struct request_queue *queue;
struct rnbd_queue *hw_queues;
@@ -114,15 +115,14 @@ struct rnbd_clt_dev {
u32 clt_device_id;
struct mutex lock;
enum rnbd_clt_dev_state dev_state;
+ refcount_t refcount;
char *pathname;
enum rnbd_access_mode access_mode;
u32 nr_poll_queues;
u64 size; /* device size in bytes */
struct list_head list;
struct gendisk *gd;
- struct kobject kobj;
char *blk_symlink_name;
- refcount_t refcount;
struct work_struct unmap_on_rmmod_work;
};
--
2.31.1
next prev parent reply other threads:[~2022-07-06 13:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-06 13:31 [PATCH V2 0/8] reduce the size of rnbd_clt_dev Guoqing Jiang
2022-07-06 13:31 ` [PATCH V2 1/8] rnbd-clt: open code send_msg_open in rnbd_clt_map_device Guoqing Jiang
2022-07-06 13:31 ` [PATCH V2 2/8] rnbd-clt: don't free rsp in msg_open_conf for map scenario Guoqing Jiang
2022-07-06 13:31 ` [PATCH V2 3/8] rnbd-clt: kill read_only from struct rnbd_clt_dev Guoqing Jiang
2022-07-06 13:31 ` [PATCH V2 4/8] rnbd-clt: reduce the size of " Guoqing Jiang
2022-07-06 13:31 ` Guoqing Jiang [this message]
2022-07-06 13:31 ` [PATCH V2 6/8] rnbd-clt: check capacity inside rnbd_clt_change_capacity Guoqing Jiang
2022-07-06 13:31 ` [PATCH V2 7/8] rnbd-clt: pass sector_t type for resize capacity Guoqing Jiang
2022-07-06 13:31 ` [PATCH V2 8/8] rnbd-clt: make rnbd_clt_change_capacity return void Guoqing Jiang
2022-07-06 14:52 ` [PATCH V2 0/8] reduce the size of rnbd_clt_dev Jens Axboe
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