From: Mathieu Desnoyers via lttng-dev <lttng-dev@lists.lttng.org>
To: linux-kernel <linux-kernel@vger.kernel.org>,
lttng-dev <lttng-dev@lists.lttng.org>, rp <rp@svcs.cs.pdx.edu>
Cc: paulmck <paulmck@kernel.org>,
Stephen Hemminger <stephen@networkplumber.org>,
Alan Stern <stern@rowland.harvard.edu>,
Lai Jiangshan <jiangshanlai@gmail.com>, lwn <lwn@lwn.net>
Subject: [lttng-dev] [RELEASE] Userspace RCU 0.12.4 and 0.13.2
Date: Thu, 18 Aug 2022 15:56:32 -0400 (EDT) [thread overview]
Message-ID: <927024516.15730.1660852592448.JavaMail.zimbra@efficios.com> (raw)
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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
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next reply other threads:[~2022-08-18 19:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-18 19:56 Mathieu Desnoyers via lttng-dev [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-08-18 20:07 [lttng-dev] [RELEASE] Userspace RCU 0.12.4 and 0.13.2 Mathieu Desnoyers via lttng-dev
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