On Tue, Dec 22, 2009 at 11:51:31AM +0100, Michael Buesch wrote: > Here's an interesting crash. > It sometimes happens on EMC load. It's more or less reproducible by fireing up > and shutting down EMC in a row. Something like 20 or 30 tries are sometimes > required to reproduce. > > So, what is this? Well, I'm fairly certain that we have a race condition here. > This crash does only seem to happen on SMP (I have two CPUs) when isolcpus is > _not_ used. > I'm using classic RCUs. > > > [ 340.224299] Pid: 3359, comm: milltask Not tainted 2.6.29.6-rtai #2 > GeForce7050M-M > [ 340.254912] Pid: 3352, comm: hal_manualtoolc Tainted: G D > 2.6.29.6-rtai #2 > [ 340.255157] Pid: 2630, comm: Xorg Tainted: G D W 2.6.29.6-rtai #2 > [ 340.255200] Pid: 3376, comm: rsyslogd Tainted: G D W 2.6.29.6-rtai > #2 GeForce7050M-M > [ 340.255714] Pid: 2630, comm: Xorg Tainted: G D W 2.6.29.6-rtai #2 > GeForce7050M-M
I see five panics here - three in programs unrelated to EMC. I think you may just have a bogus kernel or rtai build. When I was working on SMP, I had to try different kernels and rtai versions for a while until I got a stable system. You don't say what rtai version you're using, so I can't ask google whether others have had success with it. I think several people are running EMC on SMP systems. I have quite a bit, but not lately. While it is certainly possible, I wouldn't be too quick to assume the problem is in EMC. Chris ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
