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Date: Sun, 11 May 2008 21:32:56 +0200 From: "Rafael J. Wysocki" <rjw@...k.pl> To: "Alexander Beregalov" <a.beregalov@...il.com> Cc: jason.wessel@...driver.com, kgdb-bugreport@...ts.sourceforge.net, linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: kgdb test suite failure [Added some CCs.] On Friday, 9 of May 2008, Alexander Beregalov wrote: > Hi > I tried to run the latest git kernel and got the following error. > > See an attachment for full dmesg. > > kgdbts: ERROR PUT: end of test buffer on 'do_fork_test' line 5 > expected OK got $E02#a7 > ------------[ cut here ]------------ > WARNING: at drivers/misc/kgdbts.c:721 run_simple_test+0x1de/0x20e() > Modules linked in: > Pid: 6, comm: khelper Not tainted 2.6.26-rc1-00279-g28a4acb #12 > [<c011a00a>] warn_on_slowpath+0x41/0x6c > [<c011aa77>] ? vprintk+0x3e7/0x407 > [<c0254cf4>] ? number+0x10d/0x1cf > [<c012d3da>] ? sched_clock_cpu+0x70/0x88 > [<c011aaac>] ? printk+0x15/0x17 > [<c02ae228>] run_simple_test+0x1de/0x20e > [<c02adc15>] kgdbts_put_char+0x14/0x16 > [<c013d7ba>] put_packet+0x6b/0xbb > [<c013e8bc>] kgdb_handle_exception+0xa19/0xb21 > [<c0119400>] ? do_fork+0x0/0x19e > [<c010e9e3>] kgdb_notify+0x103/0x140 > [<c035ac89>] notifier_call_chain+0x2b/0x4a > [<c035accd>] __atomic_notifier_call_chain+0x25/0x36 > [<c035acea>] atomic_notifier_call_chain+0xc/0xe > [<c012cd15>] notify_die+0x2d/0x2f > [<c03597fd>] do_int3+0x32/0x6c > [<c0359293>] int3+0x27/0x2c > [<c0119400>] ? do_fork+0x0/0x19e > [<c010176c>] ? kernel_thread+0x73/0x7b > [<c01263d1>] ? ____call_usermodehelper+0x0/0xe7 > [<c01263d1>] ? ____call_usermodehelper+0x0/0xe7 > [<c0103740>] ? kernel_thread_helper+0x0/0x10 > [<c0126236>] __call_usermodehelper+0x33/0x4d > [<c0126686>] run_workqueue+0xba/0x187 > [<c012664c>] ? run_workqueue+0x80/0x187 > [<c0126203>] ? __call_usermodehelper+0x0/0x4d > [<c0126ea6>] worker_thread+0x80/0x8c > [<c01291bd>] ? autoremove_wake_function+0x0/0x30 > [<c0126e26>] ? worker_thread+0x0/0x8c > [<c01290fc>] kthread+0x39/0x61 > [<c01290c3>] ? kthread+0x0/0x61 > [<c0103747>] kernel_thread_helper+0x7/0x10 > ======================= > ---[ end trace b9faa95810ce9135 ]--- > e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang > Tx Queue <0> > TDH <2a> > TDT <2a> > next_to_use <2a> > next_to_clean <14> > buffer_info[next_to_clean] > time_stamp <fffeb89e> > next_to_watch <14> > jiffies <fffebb63> > next_to_watch.status <1> > khelper used greatest stack depth: 2516 bytes left > BUG: unable to handle kernel NULL pointer dereference at 00000000 > IP: [<00000000>] > *pde = 00000000 > Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC > kgdbts: BP mismatch 0 expected c0119400 > ------------[ cut here ]------------ > WARNING: at drivers/misc/kgdbts.c:302 check_and_rewind_pc+0x9a/0xb4() > Modules linked in: > Pid: 6, comm: khelper Tainted: G W 2.6.26-rc1-00279-g28a4acb #12 > [<c011a00a>] warn_on_slowpath+0x41/0x6c > [<c011aa77>] ? vprintk+0x3e7/0x407 > [<c0119400>] ? do_fork+0x0/0x19e > [<c012d3da>] ? sched_clock_cpu+0x70/0x88 > [<c0116d4e>] ? cpu_clock+0x115/0x12c > [<c0119400>] ? do_fork+0x0/0x19e > [<c011aaac>] ? printk+0x15/0x17 > [<c0119400>] ? do_fork+0x0/0x19e > [<c02ae96d>] check_and_rewind_pc+0x9a/0xb4 > [<c0119400>] ? do_fork+0x0/0x19e > [<c02adb7a>] validate_simple_test+0x22/0x69 > [<c02ae1eb>] run_simple_test+0x1a1/0x20e > [<c02adc15>] kgdbts_put_char+0x14/0x16 > [<c013d7ba>] put_packet+0x6b/0xbb > [<c013e8bc>] kgdb_handle_exception+0xa19/0xb21 > [<c010e9e3>] kgdb_notify+0x103/0x140 > [<c035ac89>] notifier_call_chain+0x2b/0x4a > [<c035accd>] __atomic_notifier_call_chain+0x25/0x36 > [<c035acea>] atomic_notifier_call_chain+0xc/0xe > [<c012cd15>] notify_die+0x2d/0x2f > [<c0359303>] __die+0x61/0xc6 > [<c0103dec>] die+0x87/0x106 > [<c035aae1>] do_page_fault+0x4e3/0x59d > [<c035a5fe>] ? do_page_fault+0x0/0x59d > [<c010176c>] ? kernel_thread+0x73/0x7b > [<c0359102>] error_code+0x6a/0x70 > [<c010176c>] ? kernel_thread+0x73/0x7b > [<c01263d1>] ? ____call_usermodehelper+0x0/0xe7 > [<c01263d1>] ? ____call_usermodehelper+0x0/0xe7 > [<c0103740>] ? kernel_thread_helper+0x0/0x10 > [<c0126236>] ? __call_usermodehelper+0x33/0x4d > [<c0126686>] ? run_workqueue+0xba/0x187 > [<c012664c>] ? run_workqueue+0x80/0x187 > [<c0126203>] ? __call_usermodehelper+0x0/0x4d > [<c0126ea6>] ? worker_thread+0x80/0x8c > [<c01291bd>] ? autoremove_wake_function+0x0/0x30 > [<c0126e26>] ? worker_thread+0x0/0x8c > [<c01290fc>] ? kthread+0x39/0x61 > [<c01290c3>] ? kthread+0x0/0x61 > [<c0103747>] ? kernel_thread_helper+0x7/0x10 > ======================= > ---[ end trace b9faa95810ce9135 ]--- > kgdbts: ERROR PUT: end of test buffer on 'do_fork_test' line 3 > expected do_fork got > $e201000000b0c6f70000000000000000000000006c1710c01141800054bfc6f7Б^A > ------------[ cut here ]------------ > WARNING: at drivers/misc/kgdbts.c:721 run_simple_test+0x1de/0x20e() > Modules linked in: > Pid: 6, comm: khelper Tainted: G W 2.6.26-rc1-00279-g28a4acb #12 > [<c011a00a>] warn_on_slowpath+0x41/0x6c > [<c011aa77>] ? vprintk+0x3e7/0x407 > [<c0119400>] ? do_fork+0x0/0x19e > [<c012d3da>] ? sched_clock_cpu+0x70/0x88 > [<c0116d4e>] ? cpu_clock+0x115/0x12c > [<c0119400>] ? do_fork+0x0/0x19e > [<c011aaac>] ? printk+0x15/0x17 > [<c011aaac>] ? printk+0x15/0x17 > [<c02ae228>] run_simple_test+0x1de/0x20e > [<c02adc15>] kgdbts_put_char+0x14/0x16 > [<c013d7ba>] put_packet+0x6b/0xbb > [<c013e8bc>] kgdb_handle_exception+0xa19/0xb21 > [<c010e9e3>] kgdb_notify+0x103/0x140 > [<c035ac89>] notifier_call_chain+0x2b/0x4a > [<c035accd>] __atomic_notifier_call_chain+0x25/0x36 > [<c035acea>] atomic_notifier_call_chain+0xc/0xe > [<c012cd15>] notify_die+0x2d/0x2f > [<c0359303>] __die+0x61/0xc6 > [<c0103dec>] die+0x87/0x106 > [<c035aae1>] do_page_fault+0x4e3/0x59d > [<c035a5fe>] ? do_page_fault+0x0/0x59d > [<c010176c>] ? kernel_thread+0x73/0x7b > [<c0359102>] error_code+0x6a/0x70 > [<c010176c>] ? kernel_thread+0x73/0x7b > [<c01263d1>] ? ____call_usermodehelper+0x0/0xe7 > [<c01263d1>] ? ____call_usermodehelper+0x0/0xe7 > [<c0103740>] ? kernel_thread_helper+0x0/0x10 > [<c0126236>] ? __call_usermodehelper+0x33/0x4d > [<c0126686>] ? run_workqueue+0xba/0x187 > [<c012664c>] ? run_workqueue+0x80/0x187 > [<c0126203>] ? __call_usermodehelper+0x0/0x4d > [<c0126ea6>] ? worker_thread+0x80/0x8c > [<c01291bd>] ? autoremove_wake_function+0x0/0x30 > [<c0126e26>] ? worker_thread+0x0/0x8c > [<c01290fc>] ? kthread+0x39/0x61 > [<c01290c3>] ? kthread+0x0/0x61 > [<c0103747>] ? kernel_thread_helper+0x7/0x10 > ======================= > ---[ end trace b9faa95810ce9135 ]--- > -- "Premature optimization is the root of all evil." - Donald Knuth -- 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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