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Question about peropens in the term server


From: Richard Braun
Subject: Question about peropens in the term server
Date: Fri, 10 Aug 2012 00:49:05 +0200
User-agent: Mutt/1.5.20 (2009-06-14)

Hello,

While investigating an issue in the term server, I think I came across
a weird problem. The issue is that, after logging in and out through
ssh, a pty master will still consider itself open and refuse new
sessions, leading to the exhaustion of all the precreated pairs after
some time.

The GDB traced I've obtained [1] shows a couple of matching
create/destroy hooks, but the first (create) call, which trivfs control
matches ptyctl (po->cntl == ptyctl), is never destroyed. At the same
time, the last call shows a peropen address never seen before. How is
it possible to see a peropen at release time never seen at creation
time ?

-- 
Richard Braun



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