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Date:      Wed, 30 Sep 2009 11:02:19 -0700
From:      Justin Teller <justin.teller@gmail.com>
To:        freebsd-current@freebsd.org
Subject:   Signals and an exiting thread
Message-ID:  <c47019cc0909301102y189a0b8aq47d23efae549f4ab@mail.gmail.com>

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We're trying to control one process from another process through
signals (I know, revolutionary ;-), and we've found that a signal
occasionally gets lost. =A0The process we're signaling is
multi-threaded. =A0It looks like the signal is lost when the kernel
decides to post the signal to a thread that is in the process of dying
(calling pthread_exit, etc).

Is this expected behavior that we should just handle, or is it a race
in the kernel that should be/will be/already is fixed?

It may be that a fix is already in current, and I just haven't found
it in my searches through the source code (I'm working off of source
code for an older 8.0 image).  If it is fixed, I'd appreciate a
pointer to the code that fixes it.

Thanks in advance for the help
- Justin



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