[Chicken-janitors] Re: #340: Spiffy hangs occasionally (again!)

[Chicken Trac]

#340: Spiffy hangs occasionally (again!)
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  Reporter:  sjamaan  |       Owner:  felix                                     
     
      Type:  defect   |      Status:  assigned                                  
     
  Priority:  major    |   Milestone:                                            
     
 Component:  wiki     |     Version:  4.5.x                                     
     
Resolution:           |    Keywords:  spiffy, wiki, hang, call-cc.org, 
infrastructure
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Comment(by felix):

 I have finally started to take a look at the scheduler. I haven't a clue
 why this situation crops up. Apparently there are entries in the "fd-list"
 (the list that holds FDs and the threads waiting for them) for which no
 bits where set in the fdsets - these are set just once, when the threads
 is blocked for I/O, and then retained. The operations to keep an fdset and
 later restore it may be broken (I just use assignment, but this may be
 invalid for certain implementations of fdsets), or the fdset and the
 fdlist are getting out of sync by some other reason.

 I'm trying to provide a patch that simplifies the fdset handling. The
 fdset is here always initialized from scratch from the fdlist before doing
 the `select(2)` call. Isn't working yet.

-- 
Ticket URL: <http://bugs.call-cc.org/ticket/340#comment:14>
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