From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mathieu Desnoyers Subject: [RELEASE] Userspace RCU 0.8.11, 0.9.5, 0.10.1 Date: Tue, 23 Jan 2018 20:34:10 +0000 (UTC) Message-ID: <2066090908.8090.1516739650023.JavaMail.zimbra@efficios.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, lttng-dev@lists.lttng.org, rp@svcs.cs.pdx.edu Cc: "Paul E. McKenney" , Stephen Hemminger , Alan Stern , Lai Jiangshan List-Id: lttng-dev@lists.lttng.org Hi, This is a set of releases for the stable branches of the Userspace RCU library. liburcu is a LGPLv2.1 userspace RCU (read-copy-update) library. This data synchronization library provides read-side access which scales linearly with the number of cores. It does so by allowing multiple copies of a given data structure to live at the same time, and by monitoring the data structure accesses to detect grace periods after which memory reclamation is possible. liburcu-cds provides efficient data structures based on RCU and lock-free algorithms. Those structures include hash tables, queues, stacks, and doubly-linked lists. On versions 0.8 and 0.9, the fixes introduced target pretty much only the Cygwin port. On 0.10, the use of SHARED membarrier by liburcu-bp is removed, because this kernel system call sometimes takes between 10-100ms to execute, which is not acceptable for some workloads. Note: a new PRIVATE_EXPEDITED membarrier is introduced in kernel 4.14, and the next version of liburcu will use it when available [1]. Changelog: 2018-01-23 Userspace RCU 0.8.11 * Fix: don't use overlapping mmap mappings on Cygwin * Tests fix: add missing Cygwin thread id * Fix: assignment from incompatible pointer type warnings * Tests fix: unused variable warnings 2018-01-23 Userspace RCU 0.9.5 * Fix: don't use overlapping mmap mappings on Cygwin * Fix: don't use membarrier SHARED syscall command in liburcu-bp * Tests fix: add missing Cygwin thread id * Fix: assignment from incompatible pointer type warnings * Tests fix: unused variable warnings 2018-01-23 Userspace RCU 0.10.1 * Fix: don't use overlapping mmap mappings on Cygwin * Fix: don't use membarrier SHARED syscall command in liburcu-bp * Tests fix: add missing Cygwin thread id * Fix: assignment from incompatible pointer type warnings * Tests fix: unused variable warnings * Fix: add missing m68k headers to dist [1] http://lttng.org/blog/2018/01/15/membarrier-system-call-performance-and-userspace-rcu/ Project website: http://liburcu.org Git repository: git://git.liburcu.org/urcu.git -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com