From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mathieu Desnoyers Subject: [RELEASE] Userspace RCU 0.7.5 Date: Fri, 12 Oct 2012 07:18:35 -0400 Message-ID: <20121012111835.GA15280@Krystal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, lttng-dev@lists.lttng.org, rp@svcs.cs.pdx.edu Cc: Stephen Hemminger , Lai Jiangshan , "Paul E. McKenney" List-Id: lttng-dev@lists.lttng.org 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 multiples 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. This is the start of a stable-0.7 branch to push important fixes. The master branch development will continue and eventually result in a 0.8.0 release. Please note that the bug "call_rcu list corruption on teardown" occurs very rarely, only when invoking call_rcu_data_free() for per-cpu or per-thread callback-invocation threads (typically before application exit). The fix for this corruption bug is the same as the fix used in the stable-0.6 branch. This fix is not needed in the master branch, because the issue had been already fixed by moving call_rcu to the new wfcqueue API. Changelog: 2012-10-12 Userspace RCU 0.7.5 * Fix: call_rcu list corruption on teardown * Ensure that read-side functions meet 10-line LGPL criterion * tls-compat.h: document sigaltstack(2) limitation * urcu: add notice to URCU_TLS() for it is not strictly async-signal-safe * Document sigaltstack(2) limitation * Documentation: update LICENSE file Project website: http://lttng.org/urcu Download link: http://lttng.org/files/urcu/ -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com