Hi Philippe, booting forge with a restricted CPU set cause a panic:
[ 1.540121] Kernel panic - not syncing: bug at /data/linux-ipipe/kernel/xenomai/timer.c:484 (!cpu_isset(xnsched_cpu(sched), xnsched_realtime_cpus)) [ 1.541935] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.28+ #101 [ 1.542907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 1.544150] ffff88003dea1280 ffff88003fa5bc58 ffffffff8164deaf ffff88003fa5bcd8 [ 1.545361] ffffffff8164da69 0000000000000020 ffff88003fa5bce8 ffff88003fa5bc88 [ 1.546566] ffffffff810d93ec ffff88003dea88c8 ffffffff81850b88 00000000000001e4 [ 1.547779] Call Trace: [ 1.548420] [<ffffffff8164deaf>] dump_stack+0x19/0x22 [ 1.549220] [<ffffffff8164da69>] panic+0xd9/0x1f0 [ 1.549966] [<ffffffff810d93ec>] ? __ipipe_restore_head+0x7c/0x100 [ 1.550059] [<ffffffff8112f748>] __xntimer_migrate+0x118/0x120 [ 1.550059] [<ffffffff81130c19>] xnsched_quota_init+0xc9/0x150 [ 1.550059] [<ffffffff81118dae>] xnsched_init+0x8e/0x280 [ 1.550059] [<ffffffff8111018b>] ? xnheap_set_label+0x15b/0x270 [ 1.550059] [<ffffffff81caf963>] xenomai_init+0x31b/0x6e4 [ 1.550059] [<ffffffff81caf648>] ? xnheap_mount+0x95/0x95 [ 1.550059] [<ffffffff81000272>] do_one_initcall+0x42/0x1a0 [ 1.550059] [<ffffffff81c8ef84>] kernel_init_freeable+0x142/0x1d7 [ 1.550059] [<ffffffff81c8e780>] ? loglevel+0x31/0x31 [ 1.550059] [<ffffffff8163bc10>] ? rest_init+0xa0/0xa0 [ 1.550059] [<ffffffff8163bc1e>] kernel_init+0xe/0xf0 [ 1.550059] [<ffffffff8165afad>] ret_from_fork+0x7d/0xb0 [ 1.550059] [<ffffffff8163bc10>] ? rest_init+0xa0/0xa0 When I look at the (presumed) causing commit 89c3ce894e, I see that you changed sys_init (and sys_shutdown) to work against all CPUs, not only the supported ones. However, creating a sched over an unsupported CPU triggers that BUG_ON in __xntimer_migrate. Why do we need scheds for all CPUs? Or was that conversion from for_each_realtime_cpu to for_each_online_cpu done accidentally? Then the bug is simple to fix, otherwise I need some hint. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux _______________________________________________ Xenomai mailing list Xenomai@xenomai.org http://www.xenomai.org/mailman/listinfo/xenomai
