Re: kern/44402: page fault in supervisor mode in netbsd:filt_piperead

[Krister Walfridsson <kristerw%netbsd.org@localhost>]

The following reply was made to PR kern/44402; it has been noted by GNATS.

From: Krister Walfridsson <kristerw%netbsd.org@localhost>
To: David Holland <dholland-bugs%netbsd.org@localhost>
Cc: gnats-bugs%netbsd.org@localhost, kern-bug-people%netbsd.org@localhost, 
gnats-admin%netbsd.org@localhost, 
        netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/44402: page fault in supervisor mode in netbsd:filt_piperead
Date: Mon, 18 Jul 2011 16:55:46 +0200

 I can still reproduce this with current NetBSD.
 
 I have also reproduced this on another machine (i386 current running
 in VMWare fusion configured as using two CPUs), although it takes much
 longer time for that one to panic ("a few hours" compared to "a few
 minutes" on my development machine).
 
 I tried to reproduce this on a single-CPU machine without success.
 But I only let the script run for ~1 hour, so I do not know if I were
 just unlucky, or if you need a multiprocessor machine in order to
 trigger this bug.
 
 I have not managed to create a small, simple, test program that
 triggers this bug.  But I have placed a tar-ball (PR44402.tgz) in
 ~kristerw at ftp.netbsd.org that contains everything needed to
 reproduce this.
 
   /Krister