Re: multi thread app and often variable accessing

[David Nečas (Yeti) <yeti physics muni cz>]

On Fri, Jun 08, 2007 at 08:51:08PM +0200, Jonathan Winterflood wrote:
> > If you don't know what memory ordering, barriers, etc. [...]
> Indeed I don't know what these are either. Any chance that someone does?

See

  Documentation/memory-barriers.txt

in Linux source code, on-line available for instance at

  http://www.mjmwired.net/kernel/Documentation/memory-barriers.txt

for a good overview of the concepts and issues.  The later
parts of the document are kernel specific, but you may get
more information than you want even before you get to these
parts.

Attempts to use atomic operations without considering memory
access ordering guarantee subtle bugs...

Yeti

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