[asterisk-bugs] [DAHDI-linux 0013205]: [patch] bad master selection

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13205 
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Reported By:                biohumanoid
Assigned To:                kpfleming
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Project:                    DAHDI-linux
Issue ID:                   13205
Category:                   dahdi (the module)
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
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Date Submitted:             2008-07-31 00:11 CDT
Last Modified:              2009-03-06 13:48 CST
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Summary:                    [patch] bad master selection
Description: 
Current dahdi master handling work in the following way:
The first SPAN become a master
If a new registered !!! SPAN is preferred , it is the new master
If a span is unregistered - the new master is the first available span
If master SPAN is in alarm state - the new master is the first non in
alarm state SPAN

So
1. dahdi-dummy once loaded will be the master forever.
2. even not-running SPAN can be a master
3. master implementation is ugly...
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 (0101315) sruffell (administrator) - 2009-03-06 13:48
 http://bugs.digium.com/view.php?id=13205#c101315 
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I'm also wondering out loud, with the cards that do not have such stringent
requirements for interrupt to isr latency, whether the sync_tick method
could be used to allow a board to mask off it's interrupt and be polled
along with the other hardware.  I know there have been some discussion
about this subject that predates my involvement with the project.

But, for example, if a wcte12xp or wctdm24xxp supported card is not the
master span, it could implement the sync_tick function and then disable
interrupts on it's interface and then poll in the sync_tick function. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-03-06 13:48 sruffell       Note Added: 0101315                          
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