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[Qemu-devel] [PATCH 0/2] atomics: fix small RCU perf. regression + updat

From: Emilio G. Cota
Subject: [Qemu-devel] [PATCH 0/2] atomics: fix small RCU perf. regression + update documentation
Date: Sat, 21 May 2016 16:42:14 -0400

Patch 1 fixes a small performance regression introduced when moving
our atomics to __atomic primitives. The regression can be measured
on RMO architectures (I used aarch64); the effect is very small
but consistently measurable: for instance, rcutorture performance
degraded by about 0.3%.

Patch 2 originates from a recent discussion[1] that led me to
look into what guarantees can be assumed from our atomic_read/set



[1] https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg03088.html

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