From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mathieu Desnoyers Subject: Re: [RELEASE] Userspace RCU 0.7.6 Date: Thu, 10 Jan 2013 11:42:41 -0500 Message-ID: <20130110164241.GA5051@Krystal> References: <20130109184616.GA14968@Krystal> <20130110083247.591ad0ba@nehalam.linuxnetplumber.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20130110083247.591ad0ba@nehalam.linuxnetplumber.net> Sender: linux-kernel-owner@vger.kernel.org To: Stephen Hemminger Cc: linux-kernel@vger.kernel.org, lttng-dev@lists.lttng.org, rp@svcs.cs.pdx.edu, "Paul E. McKenney" , Lai Jiangshan , Alan Stern List-Id: lttng-dev@lists.lttng.org * Stephen Hemminger (shemminger@vyatta.com) wrote: > On Wed, 9 Jan 2013 13:46:17 -0500 > Mathieu Desnoyers wrote: > > > 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 a bugfix release, mainly fixing handling of processes using > > call_rcu, then fork() without following exec(), and then continuing use > > of synchronize_rcu() or call_rcu() in the child process. A hang in > > synchronize_rcu() in the child could occur, which is fixed by this > > release. > > > > Changelog: > > 2013-01-09 Userspace RCU 0.7.6 > > * Discourage use of pthread_atfork() for call_rcu handlers > > * Fix call_rcu fork handling > > * test: fork handling > > * Fix TLS detection: test with linker, add --disable-compiler-tls > > * Cleanup: cast pthread_self() return value to unsigned long > > * Fallback mechanism not working on platform where TLS is unsupported > > > > Project website: http://lttng.org/urcu > > Download link: http://lttng.org/files/urcu/ > > > > Why is the git repository still at 0.7.4 and there is no tag for 0.7.6? > Am I looking at the right place? > $ git remote -v > origin git://git.lttng.org/userspace-rcu.git (fetch) I tried doing this to confirm: git clone git://git.lttng.org/userspace-rcu.git cd userspace-rcu git tag -l and v0.7.6 is there. Please note that this tag is in the stable-0.7 branch (not master). Please let me know if the problem persists for you after making sure you use the right branch. Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com