From: Olivier Dion via lttng-dev <lttng-dev@lists.lttng.org>
To: lttng-dev@lists.lttng.org
Subject: [lttng-dev] RCU - Bugs in atomic operations for RISC-V with GCC
Date: Thu, 28 Sep 2023 13:09:31 -0400 [thread overview]
Message-ID: <87il7uxm0k.fsf@laura> (raw)
Hi all,
We recently have been informed that the implementation of atomic
operations in GCC for RISC-V have bugs in them [1]. However, the fixing
patches missed the 13.2 release and it does not seem that they have been
back-ported to other versions yet.
For this reasons, we concur that it was best to mark Userspace RCU as
broken for RISC-V when compiling with GCC. However, it is still
possible to compile Userspace RCU for RISC-V with other toolchains such
as Clang.
Cheers,
Olivier
[1] https://review.lttng.org/c/userspace-rcu/+/10942
--
Olivier Dion
EfficiOS Inc.
https://www.efficios.com
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