Subject: [patch 0/3] introduce sys_membarrier(): process-wide memory barrier (v8)
Newsgroups: gmane.linux.kernel
Date: 2010-01-31 20:52:54 GMT (2 years, 15 weeks, 5 days, 1 hour and 34 minutes ago)
Hi, Here is an updated version of the sys_membarrier system call. It implements a system call that allows userspace to distribute the overhead of memory barriers asymmetrically. It is particularly useful for Userspace RCU (liburcu), to allow the RCU read-side to only issue compiler barriers, matched by calls to sys_membarrier() in the userspace synchronize_rcu(). Even though sys_membarrier should be portable to other architecture as-is without arch-specific modifications, I propose to incrementally reserve the system call IDs as we test it on each architecture. Here is a version that I think should be ready for merging. It is based on the 2.6.33-rc6 kernel. I would appreciate if people who gave their Acked-by in the RFC rounds could confirm their Acked-by following the patch set updates. Thanks, Mathieu -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68