Re: kern/24829 (panic: postsig action on SMP system)

[Jarle Greipsland <jarle%uninett.no@localhost>]

The following reply was made to PR kern/24829; it has been noted by GNATS.

From: Jarle Greipsland <jarle%uninett.no@localhost>
To: gnats-bugs%NetBSD.org@localhost, dsl%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
        gnats-admin%netbsd.org@localhost
Subject: Re: kern/24829 (panic: postsig action on SMP system)
Date: Tue, 01 Dec 2009 16:48:52 +0100 (CET)

 dsl%NetBSD.org@localhost writes:
 > Synopsis: panic: postsig action on SMP system
 > 
 > State-Changed-From-To: open->feedback
 > State-Changed-By: dsl%NetBSD.org@localhost
 > State-Changed-When: Sat, 28 Nov 2009 15:36:13 +0000
 > State-Changed-Why:
 > Does the problem happen with the 1:1 thread library?
 > I think there were unfixable issues with PTHREAD_CONCURRENCY and
 > the old SA threads.
 It seems like the panic has gone away.  I tried various
 combination of http_load and start/stop-sequences of the web
 server, and the kernel did not panic.  I think we should consider
 the kernel problem fixed.
 
 Apache still does not behave well, though.  Some threads seems to
 end up in a state where they continuously consume CPU time.
 Typically for each run of http_load, a handful of threads ended
 up in this state.  Alas, my attempt at debugging the stuff with
 gdb did not succeed.  I could not get gdb to print out
 thread-specific information (info threads).  So, whether the bug
 lies within the Apache software or NetBSD's run time libraries is
 still unknown.
 
                                        -jarle