DT WARNING during boot

[Paolo Pisati]

ubuntu@c13:~$ dmesg

[ 0.000000] Booting Linux on physical CPU 0x900
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 3.8.0-19-generic (buildd@alnasl) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #29-Ubuntu SMP Wed Apr 17 18:22:15 UTC 2013 (Ubuntu 3.8.0-19.29-generic 3.8.8)
[ 0.000000] CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: Highbank, model: Calxeda Highbank
[ 0.000000] cma: CMA: reserved 16 MiB at 2e800000
[ 0.000000] Memory policy: ECC disabled, Data cache writealloc
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at /build/buildd/linux-3.8.0/arch/arm/kernel/devtree.c:144 arm_dt_init_cpu_maps+0xfc/0x1ac()
[ 0.000000] DT /cpu 5 nodes greater than max cores 4, capping them
[ 0.000000] Modules linked in:
[ 0.000000] [<c001df98>] (unwind_backtrace+0x0/0x104) from [<c064acb4>] (dump_stack+0x20/0x24)
[ 0.000000] [<c064acb4>] (dump_stack+0x20/0x24) from [<c004b470>] (warn_slowpath_common+0x5c/0x74)
[ 0.000000] [<c004b470>] (warn_slowpath_common+0x5c/0x74) from [<c004b544>] (warn_slowpath_fmt+0x40/0x48)
[ 0.000000] [<c004b544>] (warn_slowpath_fmt+0x40/0x48) from [<c093be78>] (arm_dt_init_cpu_maps+0xfc/0x1ac)
[ 0.000000] [<c093be78>] (arm_dt_init_cpu_maps+0xfc/0x1ac) from [<c093ac40>] (setup_arch+0x578/0x754)
[ 0.000000] [<c093ac40>] (setup_arch+0x578/0x754) from [<c093661c>] (start_kernel+0xc0/0x360)
[ 0.000000] [<c093661c>] (start_kernel+0xc0/0x360) from [<0000807c>] (0x807c)
[ 0.000000] ---[ end trace da227214a82491b7 ]---
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at /build/buildd/linux-3.8.0/arch/arm/kernel/devtree.c:153 arm_dt_init_cpu_maps+0x12c/0x1ac()
[ 0.000000] DT missing boot CPU MPIDR[23:0], fall back to default cpu_logical_map
[ 0.000000] Modules linked in:
[ 0.000000] [<c001df98>] (unwind_backtrace+0x0/0x104) from [<c064acb4>] (dump_stack+0x20/0x24)
[ 0.000000] [<c064acb4>] (dump_stack+0x20/0x24) from [<c004b470>] (warn_slowpath_common+0x5c/0x74)
[ 0.000000] [<c004b470>] (warn_slowpath_common+0x5c/0x74) from [<c004b544>] (warn_slowpath_fmt+0x40/0x48)
[ 0.000000] [<c004b544>] (warn_slowpath_fmt+0x40/0x48) from [<c093bea8>] (arm_dt_init_cpu_maps+0x12c/0x1ac)
[ 0.000000] [<c093bea8>] (arm_dt_init_cpu_maps+0x12c/0x1ac) from [<c093ac40>] (setup_arch+0x578/0x754)
[ 0.000000] [<c093ac40>] (setup_arch+0x578/0x754) from [<c093661c>] (start_kernel+0xc0/0x360)
[ 0.000000] [<c093661c>] (start_kernel+0xc0/0x360) from [<0000807c>] (0x807c)
[ 0.000000] ---[ end trace da227214a82491b8 ]---
...

[Paolo Pisati (p-pisati)]

fixes were already available, but are said to break cpufreq:

http://lists.infradead.org/pipermail/linux-arm-kernel/2013-January/139767.html

i'll further investigate, this lp is just a reminder for myself.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1170631

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.