Dear Linux rt users On two different desktop PC (both Core 2 Duo) and on a notebook (Core Duo) the kernel (2.6.24.7-rt26, CONFIG_X86_32) locks up hard under a certain rt load. The failure can be reproduced reliably with the following command: sudo ./cyclictest -p99 -t10 -n -i250 During the test I made some additional observations: - The lockup is really hard: there is no output on a netconsole and even the magic sysrequest keys to reboot the system (Alt+SysRQ+b) do not work anymore. - with a lower realtime priority the system seems to run at least more stable (e.g. sudo ./cyclictest -p95 -t10 -n -i250) - with the vanilla 2.6.26.6-rt11 kernel I observed probably the same crash - the problem also appears on Ubuntu Hardy Heron with the latest official kernel (2.6.24.23.25 with rt21 patch) - the problem did not appear on Ubuntu Hardy Heron with older rt-kernel versions (also 2.6.24 but based on rt3 patch) So at the moment I am really clueless and I would be happy for any hint on how I can further debug this crash. Best regards Matthias -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
