* Mark Lord <lkml@xxxxxx> wrote: >> Can you try nohz=off highres=off? Strange stuff is happening with >> nohz. > > (added Ingo to CC: list: maybe this is some weird interaction with CFS > and jiffies being reset to 0 on resume ??) hm, CFS should have no impact here. To see what's happening you could try to use the latency tracer of the -rt patch and do a cross-resume trace. pick up the latest latency tracer patch from: http://redhat.com/~mingo/private/latency-tracer-v2.6.24-rc2-git5-combo.patch apply it and enable CONFIG_FUNCTION_TRACING, then pick up trace-cmd.c: http://redhat.com/~mingo/private/trace-cmd.c and do something like: ./trace-cmd pm-suspend > trace.txt or: ./trace-cmd /bin/bash -c "echo ram > /sys/power/state" > trace.txt this should trigger suspend - then you should do the resume. If everything goes well then trace.txt should contain a pretty large trace of all the stuff we do during a suspend+resume. and wait for such a pause and send us the resulting trace.txt. if it's an SMP box then first do: echo 1 > /proc/sys/kernel/trace_all_cpus to get a global trace. Let me know if something doesnt work with this scheme. Ingo _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
