linux-kernel - [RFC PATCH 0/2] vfs: Use per-cpu list for SB's s

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Message-Id: <1455672680-7153-1-git-send-email-Waiman.Long@hpe.com>
Date:	Tue, 16 Feb 2016 20:31:18 -0500
From:	Waiman Long <Waiman.Long@....com>
To:	Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.com>,
	Jeff Layton <jlayton@...chiereds.net>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Tejun Heo <tj@...nel.org>,
	Christoph Lameter <cl@...ux-foundation.org>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	Dave Chinner <dchinner@...hat.com>,
	Scott J Norton <scott.norton@...com>,
	Douglas Hatch <doug.hatch@...com>,
	Waiman Long <Waiman.Long@....com>
Subject: [RFC PATCH 0/2] vfs: Use per-cpu list for SB's s_inodes list

This patch is a replacement of my previous list batching patch -
https://lwn.net/Articles/674105/. Compared with the previous patch,
this one provides better performance and fairness. However, it also
requires a bit more changes in the VFS layer.

This patchset is a derivative of Andi Kleen's patch on "Initial per
cpu list for the per sb inode list"

https://git.kernel.org/cgit/linux/kernel/git/ak/linux-misc.git/commit/?h=hle315/combined&id=f1cf9e715a40f44086662ae3b29f123cf059cbf4

Patch 1 introduces the per-cpu list.

Patch 2 modifies the superblock and inode structures to use the per-cpu
list. The corresponding functions that reference those structures are
modified.

Waiman Long (2):
  lib/percpu-list: Per-cpu list with associated per-cpu locks
  vfs: Use per-cpu list for superblock's inode list

 fs/block_dev.c              |   16 +++---
 fs/drop_caches.c            |   11 ++--
 fs/fs-writeback.c           |   16 +++---
 fs/inode.c                  |   43 ++++++----------
 fs/notify/inode_mark.c      |   22 ++++----
 fs/quota/dquot.c            |   23 ++++-----
 fs/super.c                  |    7 ++-
 include/linux/fs.h          |    8 ++--
 include/linux/percpu-list.h |  117 +++++++++++++++++++++++++++++++++++++++++++
 lib/Makefile                |    2 +-
 lib/percpu-list.c           |   80 +++++++++++++++++++++++++++++
 11 files changed, 263 insertions(+), 82 deletions(-)
 create mode 100644 include/linux/percpu-list.h
 create mode 100644 lib/percpu-list.c