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From:   wuqiang <wuqiang.matt@bytedance.com>
To:     mhiramat@kernel.org, davem@davemloft.net,
        anil.s.keshavamurthy@intel.com, naveen.n.rao@linux.ibm.com,
        rostedt@goodmis.org, peterz@infradead.org,
        akpm@linux-foundation.org, sander@svanheule.net,
        ebiggers@google.com, dan.j.williams@intel.com, jpoimboe@kernel.org
Cc:     linux-kernel@vger.kernel.org, lkp@intel.com, mattwu@163.com,
        wuqiang <wuqiang.matt@bytedance.com>
Subject: [PATCH v7 0/5] lib,kprobes: kretprobe scalability improvement
Date:   Mon, 12 Dec 2022 20:31:48 +0800
Message-Id: <20221212123153.190888-1-wuqiang.matt@bytedance.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

This patch series introduces a scalable and lockless ring-array based
object pool and replaces the original freelist (a LIFO queue based on
singly linked list) to improve scalability of kretprobed routines.

Changes from v6 (https://lore.kernel.org/lkml/20221108071443.258794-1-wuqiang.matt@bytedance.com/):
  1) objpool: implementation simplified as Masami advised
  2) rethook_alloc: error codes returning supported (ERR_PTR)
  3) MAINTAINERS: support added for objpool files
  4) synced to latest 6.1 with x86_64/x86/aarch64 verified

wuqiang (5):
  lib: objpool added: ring-array based lockless MPMC queue
  lib: objpool test module added
  kprobes: kretprobe scalability improvement with objpool
  kprobes: freelist.h removed
  MAINTAINERS: objpool added

 MAINTAINERS              |   7 +
 include/linux/freelist.h | 129 --------
 include/linux/kprobes.h  |   9 +-
 include/linux/objpool.h  | 109 ++++++
 include/linux/rethook.h  |  14 +-
 kernel/kprobes.c         | 101 +++---
 kernel/trace/fprobe.c    |  37 +--
 kernel/trace/rethook.c   |  99 +++---
 lib/Kconfig.debug        |  11 +
 lib/Makefile             |   4 +-
 lib/objpool.c            | 320 ++++++++++++++++++
 lib/test_objpool.c       | 696 +++++++++++++++++++++++++++++++++++++++
 12 files changed, 1264 insertions(+), 272 deletions(-)
 delete mode 100644 include/linux/freelist.h
 create mode 100644 include/linux/objpool.h
 create mode 100644 lib/objpool.c
 create mode 100644 lib/test_objpool.c

-- 
2.34.1