From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: linux-kernel@vger.kernel.org, lttng-dev@lists.lttng.org,
rp@svcs.cs.pdx.edu
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Stephen Hemminger <stephen@networkplumber.org>,
Alan Stern <stern@rowland.harvard.edu>,
Lai Jiangshan <jiangshanlai@gmail.com>
Subject: [RELEASE] Userspace RCU 0.8.11, 0.9.5, 0.10.1
Date: Tue, 23 Jan 2018 20:34:10 +0000 (UTC) [thread overview]
Message-ID: <2066090908.8090.1516739650023.JavaMail.zimbra@efficios.com> (raw)
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
reply other threads:[~2018-01-23 20:33 UTC|newest]
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