From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.lttng.org (lists.lttng.org [167.114.26.123]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 48AF9C32772 for ; Thu, 18 Aug 2022 20:07:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lists.lttng.org; s=default; t=1660853257; bh=6GcNEWkPdITcallTTeHTIduAv9vKhqHY8QnYo/xvsS0=; h=Date:To:Cc:Subject:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From:Reply-To:From; b=vPDerdMfl+f8bIkSeEksorsDuPrkj3qJISL2ikGBXP7FZi7RP2/6l9FV6ImI71suq Rvk/+zboB0k0GheESo3821rI1gKFb7kyhrAtfIHRfqwTmJVe3FclKkIAe+EhjlDi3s 0j/A62edIrF3UYo2iFY5h5mXxQB2ej2Uc358diPv5iHOhRXduFuQejARdNK25BXHWR LSFN2xlUiQHcm9DM65d76jnWvAnAJx9ogMAovo9HTxlVMcGOPzQOJSoBaaZ2iUbGrS 8zp4KR36uCe7FH6IYRvIa/1WTpaau5FRCGT2VIxdUDpy9eVi2ld6RHImjLVz8CBFBa 1k6SV5ohiLKuQ== Received: from lists-lttng01.efficios.com (localhost [IPv6:::1]) by lists.lttng.org (Postfix) with ESMTP id 4M7wsj1XG8z1J6C; Thu, 18 Aug 2022 16:07:37 -0400 (EDT) Received: from mail.efficios.com (mail.efficios.com [167.114.26.124]) by lists.lttng.org (Postfix) with ESMTPS id 4M7wsg1L0sz1Jc0 for ; Thu, 18 Aug 2022 16:07:35 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id CCEB7397077 for ; Thu, 18 Aug 2022 16:07:34 -0400 (EDT) Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id gsVIAdTyPiF4; Thu, 18 Aug 2022 16:07:34 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mail.efficios.com (Postfix) with ESMTP id 3C466397074; Thu, 18 Aug 2022 16:07:34 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.efficios.com 3C466397074 X-Virus-Scanned: amavisd-new at efficios.com Received: from mail.efficios.com ([127.0.0.1]) by localhost (mail03.efficios.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id fyzT_UDvwwWd; Thu, 18 Aug 2022 16:07:34 -0400 (EDT) Received: from mail03.efficios.com (mail03.efficios.com [167.114.26.124]) by mail.efficios.com (Postfix) with ESMTP id 2EEC3397694; Thu, 18 Aug 2022 16:07:34 -0400 (EDT) Date: Thu, 18 Aug 2022 16:07:34 -0400 (EDT) To: linux-kernel , lttng-dev , rp Cc: paulmck , Stephen Hemminger , Alan Stern , Lai Jiangshan , lwn Message-ID: <1089391319.15796.1660853254177.JavaMail.zimbra@efficios.com> MIME-Version: 1.0 X-Originating-IP: [167.114.26.124] X-Mailer: Zimbra 8.8.15_GA_4372 (ZimbraWebClient - FF103 (Linux)/8.8.15_GA_4372) Thread-Index: bwIKiKBCPmydWVq5CpBZdRA1UQ0RxA== Thread-Topic: Userspace RCU 0.12.4 and 0.13.2 Subject: [lttng-dev] [RELEASE] Userspace RCU 0.12.4 and 0.13.2 X-BeenThere: lttng-dev@lists.lttng.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: LTTng development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Mathieu Desnoyers via lttng-dev Reply-To: Mathieu Desnoyers Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" [ re-sending without html headers. My email client managed to add those without me realizing it. ] Hi, This is stable release announcement for the Userspace RCU project. It covers the two currently maintained stable branches: 0.12 and 0.13, respectively with releases v0.12.4 and v0.13.2. Especially for the spurious futex wakeup fix, users of the 0.12 and 0.13 (or older) liburcu branches are recommended to upgrade. * Noteworthy in these releases: - Handle spurious futex wakeups in urcu-qsbr, urcu, urcu-wait, defer_rcu, call_rcu, and workqueue code. This has been known to cause issues where the workqueue worker thread spuriously takes nearly 100% of CPU time. - Change method used by _rcu_dereference ot strip type constness. Rather than using pointer arithmetic (which does not work with opaque types), rely on a statement expression trick. - Fix support for Linux systems where sysconf(_SC_NPROCESSORS_CONF) can return a value less than max cpu id. Project website: https://liburcu.org Feedback is welcome! Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev