Messages in this thread | | | Date | Thu, 15 Jul 2004 02:00:01 +0200 (MEST) | From | Mikael Pettersson <> | Subject | 2.6.8-rc1-mm1 "Badness in schedule" on ppc32 |
| |
On 2004-07-14 22:01:50, Tom Rini wrote: >On Fri, Jul 09, 2004 at 02:11:03PM -0700, Andrew Morton wrote: > >> >> jhf@rivenstone.net (Joseph Fannin) wrote: >> > >> > On Thu, Jul 08, 2004 at 11:50:25PM -0700, Andrew Morton wrote: >> > > >> > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.7/2.6.7-mm7/ >> > >> > > +detect-too-early-schedule-attempts.patch >> > > >> > > Catch attempts to call the scheduler before it is ready to go. >> > >> > With this patch, my Powermac (ppc32) spews 711 (I think) >> > warning messages during bootup. >> >> hm, OK. It could be that the debug patch is a bit too aggressive, or that >> ppc got lucky and happens to always be in state TASK_RUNNING when these >> calls to schedule() occur. >> >> Maybe this task incorrectly has _TIF_NEED_RESCHED set? >> >> Anyway, ppc guys: please take a look at the results from >> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.7/2.6.7-mm7/broken \ >> -out/detect-too-early-schedule-attempts.patch and check that the kernel really \ >> should be calling schedule() at this time and place, let us know? > >Now that kallsyms data is OK, I took a quick look.. and all of this >comes from generic code, at least on the machine I tried. So if the >code shouldn't be calling schedule() then, it's a more generic problem.. > >... or I'm not following.
On my ppc32 (G3 PowerMac) 2.6.8-rc1-mm1 throws a large number of "Badness in schedule" during boot. Below are the ones I managed to capture: they contain both generic traces, and traces involving Mac-only drivers.
Some of the traces involve the PDC202XX_NEW driver; I'll move that card into an x86 PC tomorrow to see if the traces reappear or not; if they don't then it does look like a PPC32-specific problem.
The kernel .config is SMP=n, PREEMPT=n, no debugging nonsense :-)
/Mikael
[c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e0bc] wait_for_completion+0x7c/0x118 [c00e10b0] adb_request+0x170/0x238 [c00e1334] do_adb_reset_bus+0x1bc/0x530 [c00e1778] adb_probe_task+0x54/0xb8 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebbc8] do_probe+0x68/0x2c8 [c00ec214] probe_hwif+0x3a0/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebbb8] do_probe+0x58/0x2c8 [c00ec4a0] probe_hwif+0x62c/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebbc8] do_probe+0x68/0x2c8 [c00ec4a0] probe_hwif+0x62c/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c0038ef8] pdflush+0xc4/0x1f4 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e0bc] wait_for_completion+0x7c/0x118 [c00e10b0] adb_request+0x170/0x238 [c00e1334] do_adb_reset_bus+0x1bc/0x530 [c00e1778] adb_probe_task+0x54/0xb8 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebbb8] do_probe+0x58/0x2c8 [c00ec214] probe_hwif+0x3a0/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebbc8] do_probe+0x68/0x2c8 [c00ec214] probe_hwif+0x3a0/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebe20] do_probe+0x2c0/0x2c8 [c00ec214] probe_hwif+0x3a0/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebbb8] do_probe+0x58/0x2c8 [c00ec4a0] probe_hwif+0x62c/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e0bc] wait_for_completion+0x7c/0x118 [c00e10b0] adb_request+0x170/0x238 [c00e1334] do_adb_reset_bus+0x1bc/0x530 [c00e1778] adb_probe_task+0x54/0xb8 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebbc8] do_probe+0x68/0x2c8 [c00ec4a0] probe_hwif+0x62c/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c0021400] msleep+0x38/0x54 [c00ebe20] do_probe+0x2c0/0x2c8 [c00ec4a0] probe_hwif+0x62c/0x6b8 [c00ed030] probe_hwif_init+0x18/0x88 [c00efd30] ide_setup_pci_device+0x70/0x88 [c0206bd0] init_setup_pdcnew+0x10/0x20 [c0206d40] pdc202new_init_one+0x30/0x44 [c0207788] ide_scan_pcidev+0x80/0xc4 [c02077f8] ide_scan_pcibus+0x2c/0x11c [c02076e0] ide_init+0x68/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c00f32b0] pmac_ide_setup_device+0x11c/0x664 [c0207ac0] pmac_ide_macio_attach+0x11c/0x27c [c00ddd04] macio_device_probe+0x78/0xa4 [c00cbd74] bus_match+0x50/0x9c [c00cbef4] driver_attach+0x74/0xdc [c00cc30c] bus_add_driver+0xac/0x160 [c00cc928] driver_register+0x30/0x40 [c00de730] macio_register_driver+0x4c/0x68 [c0207e74] pmac_ide_probe+0x38/0x54 [c02076e4] ide_init+0x6c/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e638] schedule_timeout+0x80/0xe0 [c00f32e0] pmac_ide_setup_device+0x14c/0x664 [c0207ac0] pmac_ide_macio_attach+0x11c/0x27c [c00ddd04] macio_device_probe+0x78/0xa4 [c00cbd74] bus_match+0x50/0x9c [c00cbef4] driver_attach+0x74/0xdc [c00cc30c] bus_add_driver+0xac/0x160 [c00cc928] driver_register+0x30/0x40 [c00de730] macio_register_driver+0x4c/0x68 [c0207e74] pmac_ide_probe+0x38/0x54 [c02076e4] ide_init+0x6c/0x90 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c017e0bc] wait_for_completion+0x7c/0x118 [c00e10b0] adb_request+0x170/0x238 [c00e1334] do_adb_reset_bus+0x1bc/0x530 [c00e1778] adb_probe_task+0x54/0xb8 [c0008268] kernel_thread+0x44/0x60 Badness in schedule at kernel/sched.c:2153 Call trace: [c0005d74] check_bug_trap+0x98/0xdc [c0005f0c] ProgramCheckException+0x154/0x220 [c00055a0] ret_from_except_full+0x0/0x4c [c017da40] schedule+0x24/0x5fc [c00283a4] worker_thread+0x214/0x218 [c002ca7c] kthread+0xec/0x128 [c0008268] kernel_thread+0x44/0x60 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |