[lttng-dev] [RELEASE] Userspace RCU 0.8.9

Mathieu Desnoyers mathieu.desnoyers at efficios.com
Tue Apr 26 21:15:07 UTC 2016


This is a bugfix release (0.8.9) for 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.

2016-04-26 Userspace RCU 0.8.9
        * Fix: handle reference count overflow
        * Fix: compat_futex should work-around futex signal-restart kernel bug
        * Fix: urcu-signal: smp_mb_master() needs registry lock
        * Fix: rculfhash only needs to include urcu-pointers.h
        * Fix: format string signedness
        * Use gcc atomics on aarch64/powerpc64le
        * Fix: compat_futex: uninitialized ret variable
        * Fix: compat_futex_noasync: don't override return value
        * Fix: stable-0.8 branch does not have syscall-compat.h
        * Fix: dynamic fallback to compat futex on sys_futex ENOSYS

Project website: http://liburcu.org
Git repository: git://git.liburcu.org/urcu.git

Mathieu Desnoyers
EfficiOS Inc.

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