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Message-ID: <20100223215819.GE15854@ghostprotocols.net> Date: Tue, 23 Feb 2010 18:58:19 -0300 From: Arnaldo Carvalho de Melo <acme@...stprotocols.net> To: Thomas Gleixner <tglx@...utronix.de> Cc: LKML <linux-kernel@...r.kernel.org>, rt-users <linux-rt-users@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>, Peter Zijlstra <peterz@...radead.org>, Carsten Emde <ce@...g.ch>, Clark Williams <williams@...hat.com>, Frank Rowand <frank.rowand@...sony.com>, Robin Gareus <robin@...eus.org>, Gregory Haskins <ghaskins@...ell.com>, Philippe Reynes <philippe.reynes@...smpp.fr>, Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>, Will Schmidt <will_schmidt@...t.ibm.com>, Darren Hart <dvhltc@...ibm.com>, Jan Blunck <jblunck@...e.de>, Sven-Thorsten Dietrich <sdietrich@...ell.com>, Jon Masters <jcm@...hat.com>, Mark Knecht <markknecht@...il.com>, John Kacur <jkacur@...hat.com>, Nick Piggin <nickpiggin@...oo.com.au> Subject: Re: [ANNOUNCE] 2.6.33-rc8-rt1 Em Mon, Feb 22, 2010 at 12:24:07AM +0100, Thomas Gleixner escreveu: > We are pleased to announce the next update to our new preempt-rt > series. > > - Forward to 2.6.33-rc8 > > Finally I managed to get that beast tamed. mica.ghostprotocols.net login: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<(null)>] (null) PGD 37ea1067 PUD bae52067 PMD 0 Oops: 0010 [#1] PREEMPT SMP last sysfs file: /sys/class/misc/autofs/dev CPU 0 Pid: 7341, comm: perf Not tainted 2.6.33-rc8-rt #1 0KN122/PowerEdge 1900 RIP: 0010:[<0000000000000000>] [<(null)>] (null) RSP: 0018:ffff8800bae01990 EFLAGS: 00010046 RAX: ffffffff8140a060 RBX: ffff88012f0206c0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffff88012f0206c0 RDI: ffff8800282d0300 RBP: ffff8800bae019b8 R08: ffff8800282c3e68 R09: ffff8800bac16238 R10: ffffffff81600000 R11: ffff8800bae01b38 R12: 0000000000000001 R13: ffff8800282d0300 R14: ffff8800282d0300 R15: 0000000000000001 FS: 00007f862804b6e0(0000) GS:ffff880028200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000000 CR3: 00000000baf13000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process perf (pid: 7341, threadinfo ffff8800bae00000, task ffff880037f580c0) Stack: ffffffff8102caee ffff8800282d0300 ffff88012f0206c0 ffff8800282d0300 <0> ffff8800282d0300 ffff8800bae019d8 ffffffff8102cb29 ffff8800bac16238 <0> 0000000000000003 ffff8800bae01a38 ffffffff8103aeb3 ffff8800bae019f8 Call Trace: [<ffffffff8102caee>] ? enqueue_task+0x45/0x55 [<ffffffff8102cb29>] activate_task+0x2b/0x33 [<ffffffff8103aeb3>] try_to_wake_up+0x1cc/0x33c [<ffffffff81330d37>] ? preempt_schedule_irq+0x6a/0x76 [<ffffffff8103b072>] wake_up_process_mutex+0x15/0x17 [<ffffffff8106ac2e>] wakeup_next_waiter+0x85/0x15e [<ffffffff813319e5>] rt_spin_lock_slowunlock+0x3e/0x5c [<ffffffff8106a302>] rt_spin_lock_fastunlock+0x35/0x37 [<ffffffff81331f67>] rt_spin_unlock+0x10/0x12 [<ffffffff8105a5a7>] remove_wait_queue+0x49/0x4e [<ffffffff810f0927>] free_poll_entry+0x19/0x25 [<ffffffff810f095d>] poll_freewait+0x2a/0x6b [<ffffffff810f0c81>] do_sys_poll+0x2e3/0x3a3 [<ffffffff810f1678>] ? __pollwait+0x0/0xd7 [<ffffffff810f174f>] ? pollwake+0x0/0x5b [<ffffffff810f174f>] ? pollwake+0x0/0x5b [<ffffffff810f174f>] ? pollwake+0x0/0x5b [<ffffffff810f174f>] ? pollwake+0x0/0x5b [<ffffffff810308c7>] ? rcu_read_unlock+0x9/0xb [<ffffffff8103091f>] ? cpuacct_charge+0x56/0x5f [<ffffffff81001d1e>] ? __switch_to+0xc2/0x1ca [<ffffffff81332239>] ? _raw_spin_unlock+0x23/0x2e [<ffffffff810351c3>] ? finish_task_switch+0x53/0xb8 [<ffffffff81330caa>] ? __schedule+0x7bb/0x7de [<ffffffff810308c7>] ? rcu_read_unlock+0x9/0xb [<ffffffff810308c7>] ? rcu_read_unlock+0x9/0xb [<ffffffff8103091f>] ? cpuacct_charge+0x56/0x5f [<ffffffff81001d1e>] ? __switch_to+0xc2/0x1ca [<ffffffff81031201>] ? __dequeue_entity+0x2c/0x35 [<ffffffff810445bd>] ? timespec_add_safe+0x37/0x64 [<ffffffff810f0888>] ? poll_select_set_timeout+0x5c/0x7f [<ffffffff810f0d93>] sys_poll+0x52/0xb1 [<ffffffff81002b2b>] system_call_fastpath+0x16/0x1b Code: Bad RIP value. RIP [<(null)>] (null) RSP <ffff8800bae01990> CR2: 0000000000000000 ---[ end trace 55781d66e9d64e79 ]--- Workload (screens were frozen at that time): make -j128 allyesconfig [root@...a rt-tests]# perf record -a -f ./cyclictest -a -t -n -p99 -i100 -d50 policy: fifo: loadavg: 0.58 0.19 0.09 1/238 7343 T: 0 ( 5502) P:99 I:100 C:1305514 Min: 2 Act: 4 Avg: 3 Max: 27 T: 1 ( 5503) P:98 I:150 C: 870343 Min: 3 Act: 3 Avg: 4 Max: 25 T: 2 ( 5504) P:97 I:200 C: 652757 Min: 3 Act: 4 Avg: 3 Max: 27 T: 3 ( 5505) P:96 I:250 C: 522206 Min: 3 Act: 5 Avg: 4 Max: 25 [root@...a rt-tests]# perf top -------------------------------------------------------------------------- PerfTop: 2799 irqs/sec kernel:99.4% [1000Hz cycles], (all, 4 CPUs) -------------------------------------------------------------------------- samples pcnt function DSO _______ _____ ___________________________ ________________________________________ 9924.00 50.6% need_resched /lib/modules/2.6.33-rc8-rt/build/vmlinux 8276.00 42.2% test_ti_thread_flag /lib/modules/2.6.33-rc8-rt/build/vmlinux 116.00 0.6% _raw_spin_lock_irqsave /lib/modules/2.6.33-rc8-rt/build/vmlinux 102.00 0.5% cpupri_set /lib/modules/2.6.33-rc8-rt/build/vmlinux 90.00 0.5% sha1_block_data_order /lib64/libcrypto.so.0.9.8b 77.00 0.4% __schedule /lib/modules/2.6.33-rc8-rt/build/vmlinux 63.00 0.3% read_tsc /lib/modules/2.6.33-rc8-rt/build/vmlinux 58.00 0.3% get_next_timer_interrupt /lib/modules/2.6.33-rc8-rt/build/vmlinux 57.00 0.3% apic_timer_interrupt /lib/modules/2.6.33-rc8-rt/build/vmlinux 45.00 0.2% native_sched_clock /lib/modules/2.6.33-rc8-rt/build/vmlinux 44.00 0.2% _raw_spin_lock /lib/modules/2.6.33-rc8-rt/build/vmlinux 42.00 0.2% __unlazy_fpu /lib/modules/2.6.33-rc8-rt/build/vmlinux 40.00 0.2% system_call /lib/modules/2.6.33-rc8-rt/build/vmlinux 37.00 0.2% sched_clock_local /lib/modules/2.6.33-rc8-rt/build/vmlinux 30.00 0.2% __switch_to /lib/modules/2.6.33-rc8-rt/build/vmlinux 27.00 0.1% rt_spin_lock_fastlock /lib/modules/2.6.33-rc8-rt/build/vmlinux 26.00 0.1% rt_spin_lock_fastunlock /lib/modules/2.6.33-rc8-rt/build/vmlinux 24.00 0.1% _raw_spin_unlock_irqrestore /lib/modules/2.6.33-rc8-rt/build/vmlinux 22.00 0.1% dequeue_rt_stack /lib/modules/2.6.33-rc8-rt/build/vmlinux 22.00 0.1% timekeeping_get_ns /lib/modules/2.6.33-rc8-rt/build/vmlinux 20.00 0.1% rcu_sched_qs /lib/modules/2.6.33-rc8-rt/build/vmlinux 20.00 0.1% switch_mm /lib/modules/2.6.33-rc8-rt/build/vmlinux 19.00 0.1% mmdrop_delayed /lib/modules/2.6.33-rc8-rt/build/vmlinux 19.00 0.1% sched_clock_cpu /lib/modules/2.6.33-rc8-rt/build/vmlinux 17.00 0.1% __cycles_2_ns /lib/modules/2.6.33-rc8-rt/build/vmlinux 16.00 0.1% tick_nohz_stop_sched_tick /lib/modules/2.6.33-rc8-rt/build/vmlinux 13.00 0.1% try_to_wake_up /lib/modules/2.6.33-rc8-rt/build/vmlinux 13.00 0.1% __math_state_restore /lib/modules/2.6.33-rc8-rt/build/vmlinux 13.00 0.1% __GI_clock_gettime /lib64/librt-2.5.so 11.00 0.1% _raw_spin_lock_irq /lib/modules/2.6.33-rc8-rt/build/vmlinux 10.00 0.1% timerthread /home/acme/git/rt-tests/cyclictest 9.00 0.0% cpumask_clear_cpu /lib/modules/2.6.33-rc8-rt/build/vmlinux 9.00 0.0% __GI_vfprintf /lib64/libc-2.5.so 8.00 0.0% finish_task_switch /lib/modules/2.6.33-rc8-rt/build/vmlinux 8.00 0.0% hrtimer_interrupt /lib/modules/2.6.33-rc8-rt/build/vmlinux 8.00 0.0% ktime_get /lib/modules/2.6.33-rc8-rt/build/vmlinux 8.00 0.0% rb_erase /lib/modules/2.6.33-rc8-rt/build/vmlinux 8.00 0.0% test_ti_thread_flag /lib/modules/2.6.33-rc8-rt/build/vmlinux 7.00 0.0% pick_next_task /lib/modules/2.6.33-rc8-rt/build/vmlinux 7.00 0.0% clock_nanosleep /lib64/librt-2.5.so 6.00 0.0% __remove_hrtimer /lib/modules/2.6.33-rc8-rt/build/vmlinux 6.00 0.0% cpumask_set_cpu /lib/modules/2.6.33-rc8-rt/build/vmlinux 6.00 0.0% __rcu_read_unlock /lib/modules/2.6.33-rc8-rt/build/vmlinux 5.00 0.0% megasas_clear_intr_xscale /lib/modules/2.6.33-rc8-rt/kernel/drivers/scsi/megaraid/megaraid_sas.ko 5.00 0.0% native_apic_mem_write /lib/modules/2.6.33-rc8-rt/build/vmlinux 5.00 0.0% __hrtimer_start_range_ns /lib/modules/2.6.33-rc8-rt/build/vmlinux 5.00 0.0% rb_insert_color /lib/modules/2.6.33-rc8-rt/build/vmlinux 5.00 0.0% update_curr_rt /lib/modules/2.6.33-rc8-rt/build/vmlinux 5.00 0.0% hrtimer_nanosleep /lib/modules/2.6.33-rc8-rt/build/vmlinux - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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