The attached patch documents the Linux kernel's memory barriers.
References:
AMD64 Architecture Programmer's Manual Volume 2: System Programming
Chapter 7.1: Memory-Access Ordering
Chapter 7.4: Buffering and Combining Memory Writes
IA-32 Intel Architecture Software Developer’s Manual, Volume 3:
System Programming Guide
Chapter 7.1: Locked Atomic Operations
Chapter 7.2: Memory Ordering
Chapter 7.4: Serializing Instructions
Do you guys reckon it might be worthwhile adding Sparc's sequential
consistency, TSO, RMO and PSO models, although I think only RMO is used
in the Linux kernel? References can be found for example in:
Solaris Internals, Core Kernel Architecture, p63-68:
Chapter 3.3: Hardware Considerations for Locks and
Synchronization
Unix Systems for Modern Architectures, Symmetric Multiprocessing
and Caching for Kernel Programmers:
Chapter 13 : Other Memory Models
Or is DaveM the only one fiddling with Sparc memory barriers implementation?
Regards,
Roberto Nibali, ratz
--
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