| From: |
| Peter Zijlstra <peterz-AT-infradead.org> |
| To: |
| oleg-AT-redhat.com, paulmck-AT-linux.vnet.ibm.com, tj-AT-kernel.org, mingo-AT-redhat.com, linux-kernel-AT-vger.kernel.org, der.herr-AT-hofr.at, peterz-AT-infradead.org, dave-AT-stgolabs.net, riel-AT-redhat.com, viro-AT-ZenIV.linux.org.uk, torvalds-AT-linux-foundation.org, wagi-AT-monom.org |
| Subject: |
| [PATCH 0/7] perpcu rwsem, fs/locks and killing lglocks |
| Date: |
| Mon, 05 Sep 2016 21:40:54 +0200 |
| Message-ID: |
| <20160905194054.369038779@infradead.org> |
Hi all,
Here are some patches that I've been sitting on for far too long now.
They're a respin of earlier work [1], and have been verified by Daniel Wagner
to not suffer the regression he measured with the previous set (part of which
was operator error).
Patches 4 and 5 were needed to solve a (smallish) performance regression on
CONFIG_PREEMPT=y. They avoid a number of preemption points (and code).
I was going to gather pretty numbers from Daniels data, but I keep putting that
off and figured I ought to send the patches already.
[1] https://lkml.kernel.org/r/20150622121623.291363374@infrad...
---
Documentation/locking/lglock.txt | 166 ---------------------------------------
fs/Kconfig | 1 +
fs/locks.c | 68 +++++++++++-----
include/linux/lglock.h | 81 -------------------
include/linux/percpu-rwsem.h | 36 +++++++--
kernel/locking/Makefile | 1 -
kernel/locking/lglock.c | 111 --------------------------
kernel/stop_machine.c | 42 ++++++----
8 files changed, 107 insertions(+), 399 deletions(-)
