hi all, using the 2.6.26.6-rt11 patchset on a 2.6.26.8 kernel, i get the following stack traces: [ 4262.931832] BUG: using smp_processor_id() in preemptible [00000000] code: bash/361 [ 4262.931846] caller is mem_cgroup_charge_statistics+0x6d/0xa0 [ 4262.931852] Pid: 361, comm: bash Not tainted 2.6.26.8-rt11 #3 [ 4262.931855] [ 4262.931856] Call Trace: [ 4262.931886] [<ffffffff80396e8c>] debug_smp_processor_id+0xcc/0xd0 [ 4262.931895] [<ffffffff802daead>] mem_cgroup_charge_statistics+0x6d/0xa0 [ 4262.931905] [<ffffffff802daf19>] __mem_cgroup_add_list+0x39/0x60 [ 4262.931911] [<ffffffff802db744>] mem_cgroup_charge_common+0x314/0x330 [ 4262.931925] [<ffffffff802db78e>] mem_cgroup_charge+0xe/0x10 [ 4262.931933] [<ffffffff802b8773>] do_wp_page+0x133/0x5a0 [ 4262.931944] [<ffffffff804d7461>] ? __rt_spin_lock+0x81/0x90 [ 4262.931956] [<ffffffff802ba805>] handle_mm_fault+0x605/0x900 [ 4262.931975] [<ffffffff804dacfc>] do_page_fault+0x45c/0xd50 [ 4262.931998] [<ffffffff8021d6ee>] ? native_smp_send_reschedule+0x2e/0x50 [ 4262.932006] [<ffffffff8023a041>] ? __resched_task+0x91/0x120 [ 4262.932015] [<ffffffff8023b5f4>] ? task_new_fair+0xb4/0x100 [ 4262.932027] [<ffffffff8023e09b>] ? wake_up_new_task+0xdb/0x190 [ 4262.932038] [<ffffffff80241190>] ? do_fork+0xf0/0x330 [ 4262.932048] [<ffffffff804d748e>] ? rt_spin_lock+0x1e/0x50 [ 4262.932056] [<ffffffff802dbad2>] ? fd_install+0x52/0x60 [ 4262.932072] [<ffffffff804d81c9>] error_exit+0x0/0x60 hth, tim -- tim@xxxxxxxxxx http://tim.klingt.org There's no such entity as "most people". These are generalities. All generalities are meaningless. You've got to pin it down to a specific person doing a specific thing at a specific time and space. William S. Burroughs -- 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