linux-kernel - [PATCH 0/3] net/ceph/messenger: micro-optimizations for out

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Message-ID: <20250806094855.268799-1-max.kellermann@ionos.com>
Date: Wed,  6 Aug 2025 11:48:52 +0200
From: Max Kellermann <max.kellermann@...os.com>
To: xiubli@...hat.com,
	idryomov@...il.com,
	amarkuze@...hat.com,
	ceph-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Max Kellermann <max.kellermann@...os.com>
Subject: [PATCH 0/3] net/ceph/messenger: micro-optimizations for out_msg

These patches reduce reloads of con->out_msg by passing pointers that
we already have in local variables (i.e. registers) as parameters.

Access to con->out_queue is now gone completely from v1/v2 and only
few references to con->out_msg remain.  In the long run, I'd like to
get rid of con->out_msg completely and instead send the whole
con->out_queue in one kernel_sendmsg() call.  This patch series helps
with preparing that.

Max Kellermann (3):
  net/ceph/messenger: ceph_con_get_out_msg() returns the message pointer
  net/ceph/messenger_v[12]: pass ceph_msg* instead of loading
    con->out_msg
  net/ceph/messenger: add empty check to ceph_con_get_out_msg()

 include/linux/ceph/messenger.h |   6 +-
 net/ceph/messenger.c           |  12 +--
 net/ceph/messenger_v1.c        |  59 ++++++------
 net/ceph/messenger_v2.c        | 160 ++++++++++++++++-----------------
 4 files changed, 119 insertions(+), 118 deletions(-)

-- 
2.47.2