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A comment on Let’s Talk Concurrency: Panel with Sir Tony Hoare, Joe Armstrong, Carl Hewitt. Parent comment

Re:Let’s Talk Concurrency: Panel with Sir Tony Hoare, Joe Ar... by carlehewitt on Wednesday February 20, 2019 @01:18PM (#19210379)
Erlang lacks holes in the region of mutual exclusion of an Actor making it very difficult to things like a readers/writer scheduler for a database.

See the following:

http://web.stanford.edu/class/ee380/Abstracts/190123.html

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Re:Let’s Talk Concurrency: Panel with Sir Tony Hoare, Joe Ar... by glockenspielen on Wednesday February 20, 2019 @02:41PM (#19211261)
Mutual exclusion: https://en.m.wikipedia.org/wiki/Mutual_exclusion

Are you saying that the Erlang VM enforces mutual exclusion within its Actors, and that mutual exclusion should not be enforced within Actors?

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Re:Let’s Talk Concurrency: Panel with Sir Tony Hoare, Joe Ar... by carlehewitt on Wednesday February 20, 2019 @04:37PM (#19212243)
Every Actor has a region of mutual exclusion.

However, the region of mutual exclusion can have holes so that

    * activities can be suspended and later resumed
    * other activities can use the region of mutual
      exclusion while a message is being processed by
      another Actor
For example, a readers/writer scheduler for a database must be processing multiple activities concurrently, which is very difficult to implement in Erlang.
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