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Definition of RCU neededDefinition of RCU neededPosted Oct 14, 2006 14:45 UTC (Sat) by kevinbsmith (guest, #4778)In reply to: Definition of RCU needed by giraffedata Parent article: Sleepable RCU
"Does 'Read Copy Update' mean something to you?"
Yes. I have heard the term before, but didn't immediately think of it when I saw RCU. I had the same reaction as the parent poster ("What the #$#$ is RCU?". If the article had started "Classic RCU (Read-Copy-Update) requires that..." I would not have had that reaction.
LWN is usually excellent about this. It's one of the few places where release announcements for software packages regularly include a brief summary of what the FooBar package actually does. That's one reason this RCU case really jumped out.
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Definition of RCU Posted Oct 14, 2006 22:03 UTC (Sat) by PaulMcKenney (subscriber, #9624) [Link] My apologies for leaving out this definition!!!RCU does indeed stand for read-copy update. The name comes from the fact that readers continue to freely access the data structures even while another thread is making and substituting a copy in order to update. More information may be found at:
Definition of RCU Posted Oct 16, 2006 4:19 UTC (Mon) by xoddam (subscriber, #2322) [Link] > http://en.wikipedia.org/wiki/RCU> (I update this, so please let me know if you find bugs.)
Presumably you update a copy whilst we read the previous version :-)
Updating wikipedia Posted Oct 16, 2006 13:12 UTC (Mon) by PaulMcKenney (subscriber, #9624) [Link] ;-) ;-) ;-)
But as near as I can tell, that is exactly what happens. Although I have no idea what algorithm wikis use to accomplish this.
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