* Re: [Bug 56781] New: BUG: scheduling while atomic: modprobe/256/0x00000100 [not found] ` <87zjww2w3x.fsf@rustcorp.com.au> @ 2013-04-18 18:32 ` Tejun Heo 2013-04-19 8:58 ` Aaron Lu 0 siblings, 1 reply; 2+ messages in thread From: Tejun Heo @ 2013-04-18 18:32 UTC (permalink / raw) To: Rusty Russell; +Cc: bugzilla-daemon, Jeff Garzik, linux-ide Hello, (cc'ing Jeff, linux-ide and copying the whole message) So, the problem seems to be inside pata_acpi driver. It's calling pacpi_set_piomode() from qc_issue path while holding the queue lock. pacpi_set_piomode() calls into acpi which may sleep. It gets blocked on a semaphore and triggers the bug. Maybe some changes between 3.8.6 and 3.8.8 made it more likely to trigger but fundamentally it's a bug in the pata_acpi driver. It can't directly call into acpi while holding queue lock. Thanks. On Thu, Apr 18, 2013 at 03:55:54PM +0930, Rusty Russell wrote: > Tejun, you touched it last? > > Cheers, > Rusty. > > bugzilla-daemon@bugzilla.kernel.org writes: > > https://bugzilla.kernel.org/show_bug.cgi?id=56781 > > > > Summary: BUG: scheduling while atomic: modprobe/256/0x00000100 > > Product: Other > > Version: 2.5 > > Kernel Version: 3.8.6, 3.8.7, 3.8.8 > > Platform: All > > OS/Version: Linux > > Tree: Mainline > > Status: NEW > > Severity: high > > Priority: P1 > > Component: Modules > > AssignedTo: other_modules@kernel-bugs.osdl.org > > ReportedBy: kenzopl@o2.pl > > CC: airlied@linux.ie > > Regression: No > > > > > > Created an attachment (id=99151) > > --> (https://bugzilla.kernel.org/attachment.cgi?id=99151) > > kern.log > > > > Please be gently as this is my first bug report here. > > > > This issue is repeating since kernel version 3.8.6 up to 3.8.8 (current stable) > > and since I haven't found any solution I decided to post it here because it > > became really annoying. It maybe related to my Radeon card or my DVB USB > > adapter. It happens randomly while booting (kernel panic), sometimes I need to > > reboot my system for several times until it boots up properly, unfortunatelly I > > do not have any other log files, only pictures taken by camera. Please let me > > know if you need more information. > > > > > > kernel: [ 4.633786] BUG: scheduling while atomic: modprobe/256/0x00000100 > > kernel: [ 4.633852] Modules linked in: wmi(+) ttm drm_kms_helper drm > > forcedeth(+) i2c_algo_bit > > kernel: [ 4.633861] Pid: 256, comm: modprobe Not tainted 3.8.6 #1 > > kernel: [ 4.633863] Call Trace: > > kernel: [ 4.633865] <IRQ> [<ffffffff81752bc9>] __schedule_bug+0x4d/0x59 > > kernel: [ 4.633881] [<ffffffff8175e0f6>] __schedule+0x726/0x7b0 > > kernel: [ 4.633884] [<ffffffff8175e4c9>] schedule+0x29/0x70 > > kernel: [ 4.633886] [<ffffffff8175c96c>] schedule_timeout+0x1fc/0x2c0 > > kernel: [ 4.633892] [<ffffffff8108d6f5>] ? check_preempt_curr+0x85/0xa0 > > kernel: [ 4.633894] [<ffffffff8108d73c>] ? ttwu_do_wakeup+0x2c/0xf0 > > kernel: [ 4.633897] [<ffffffff8175d75b>] __down_common+0xa0/0xf7 > > kernel: [ 4.633899] [<ffffffff8175d7c8>] __down_timeout+0x16/0x18 > > kernel: [ 4.633904] [<ffffffff810844fe>] down_timeout+0x5e/0x70 > > kernel: [ 4.633908] [<ffffffff813d2181>] acpi_os_wait_semaphore+0x49/0x5f > > kernel: [ 4.633913] [<ffffffff813f880e>] acpi_ut_acquire_mutex+0x51/0x93 > > kernel: [ 4.633917] [<ffffffff813eae40>] > > acpi_ex_enter_interpreter+0x10/0x30 > > kernel: [ 4.633922] [<ffffffff813f0037>] acpi_evaluate_object+0x1f5/0x233 > > kernel: [ 4.633927] [<ffffffff814dd157>] ata_acpi_stm+0x97/0xe0 > > kernel: [ 4.633930] [<ffffffff814e07b1>] pacpi_set_piomode+0x51/0x70 > > kernel: [ 4.633932] [<ffffffff814e0816>] pacpi_qc_issue+0x46/0x80 > > kernel: [ 4.633936] [<ffffffff814c73b3>] ata_qc_issue+0x173/0x380 > > kernel: [ 4.633940] [<ffffffff814cd470>] ? > > ata_scsi_set_sense.constprop.24+0x30/0x30 > > kernel: [ 4.633942] [<ffffffff814cc097>] ata_scsi_translate+0xa7/0x180 > > kernel: [ 4.633945] [<ffffffff814d0259>] ata_scsi_queuecmd+0xa9/0x2b0 > > kernel: [ 4.633949] [<ffffffff814a342e>] scsi_dispatch_cmd+0xde/0x2c0 > > kernel: [ 4.633953] [<ffffffff814aae70>] scsi_request_fn+0x350/0x560 > > kernel: [ 4.633956] [<ffffffff81768b1d>] ? > > call_function_single_interrupt+0x6d/0x80 > > kernel: [ 4.633960] [<ffffffff8133e1c7>] __blk_run_queue+0x37/0x50 > > kernel: [ 4.633963] [<ffffffff814a9ef9>] scsi_run_queue+0x179/0x2b0 > > kernel: [ 4.633966] [<ffffffff81464ce7>] ? put_device+0x17/0x20 > > kernel: [ 4.633969] [<ffffffff814ab462>] scsi_next_command+0x42/0x60 > > kernel: [ 4.633971] [<ffffffff814ab6ce>] scsi_io_completion+0x1ee/0x6c0 > > kernel: [ 4.633974] [<ffffffff814a166d>] scsi_finish_command+0xbd/0x120 > > kernel: [ 4.633977] [<ffffffff814ab3ee>] scsi_softirq_done+0x13e/0x150 > > kernel: [ 4.633981] [<ffffffff81344ce3>] blk_done_softirq+0x83/0xa0 > > kernel: [ 4.633984] [<ffffffff81061aef>] __do_softirq+0xcf/0x210 > > kernel: [ 4.633989] [<ffffffff8103b948>] ? ack_apic_level+0x78/0x130 > > kernel: [ 4.633991] [<ffffffff8176905c>] call_softirq+0x1c/0x30 > > kernel: [ 4.633996] [<ffffffff810161b5>] do_softirq+0x75/0xb0 > > kernel: [ 4.633999] [<ffffffff81061da5>] irq_exit+0xa5/0xb0 > > kernel: [ 4.634002] [<ffffffff817698f3>] do_IRQ+0x63/0xe0 > > kernel: [ 4.634005] [<ffffffff8175f9ad>] common_interrupt+0x6d/0x6d > > kernel: [ 4.634006] <EOI> [<ffffffff817633f4>] ? > > __do_page_fault+0x264/0x4e0 > > kernel: [ 4.634011] [<ffffffff817633ec>] ? __do_page_fault+0x25c/0x4e0 > > kernel: [ 4.634014] [<ffffffff81086bda>] ? lg_local_unlock+0x1a/0x20 > > kernel: [ 4.634019] [<ffffffff811ab116>] ? mntput+0x26/0x40 > > kernel: [ 4.634023] [<ffffffff8118d9fe>] ? __fput+0x16e/0x240 > > kernel: [ 4.634026] [<ffffffff8118dade>] ? ____fput+0xe/0x10 > > kernel: [ 4.634031] [<ffffffff8107af71>] ? task_work_run+0xc1/0xe0 > > kernel: [ 4.634034] [<ffffffff8176367e>] do_page_fault+0xe/0x10 > > kernel: [ 4.634037] [<ffffffff8175fc98>] page_fault+0x28/0x30 > > kernel: [ 4.640098] BUG: scheduling while atomic: modprobe/256/0x00000100 > > kernel: [ 4.640167] Modules linked in: wmi(+) ttm drm_kms_helper drm > > forcedeth(+) i2c_algo_bit > > kernel: [ 4.640179] Pid: 256, comm: modprobe Tainted: G W 3.8.6 #1 > > kernel: [ 4.640181] Call Trace: > > kernel: [ 4.640183] <IRQ> [<ffffffff81752bc9>] __schedule_bug+0x4d/0x59 > > kernel: [ 4.640201] [<ffffffff8175e0f6>] __schedule+0x726/0x7b0 > > kernel: [ 4.640204] [<ffffffff8175e4c9>] schedule+0x29/0x70 > > kernel: [ 4.640206] [<ffffffff8175c96c>] schedule_timeout+0x1fc/0x2c0 > > kernel: [ 4.640212] [<ffffffff813ef0ee>] ? > > acpi_ns_search_one_scope+0x22/0x45 > > kernel: [ 4.640215] [<ffffffff813ef19c>] ? > > acpi_ns_search_and_enter+0x8b/0x147 > > kernel: [ 4.640217] [<ffffffff8175d75b>] __down_common+0xa0/0xf7 > > kernel: [ 4.640220] [<ffffffff8175d7c8>] __down_timeout+0x16/0x18 > > kernel: [ 4.640225] [<ffffffff810844fe>] down_timeout+0x5e/0x70 > > kernel: [ 4.640229] [<ffffffff813d2181>] acpi_os_wait_semaphore+0x49/0x5f > > kernel: [ 4.640233] [<ffffffff813f880e>] acpi_ut_acquire_mutex+0x51/0x93 > > kernel: [ 4.640236] [<ffffffff813eae40>] > > acpi_ex_enter_interpreter+0x10/0x30 > > kernel: [ 4.640239] [<ffffffff813ed28d>] acpi_ns_evaluate+0x13d/0x1ad > > kernel: [ 4.640242] [<ffffffff813eff69>] acpi_evaluate_object+0x127/0x233 > > kernel: [ 4.640245] [<ffffffff813d4d69>] ? acpi_get_child+0x4f/0x4f > > kernel: [ 4.640248] [<ffffffff813d25aa>] acpi_evaluate_integer+0x34/0x53 > > kernel: [ 4.640250] [<ffffffff813d4d96>] do_acpi_find_child+0x2d/0x52 > > kernel: [ 4.640253] [<ffffffff813ef970>] acpi_ns_walk_namespace+0xd5/0x179 > > kernel: [ 4.640256] [<ffffffff813d4d69>] ? acpi_get_child+0x4f/0x4f > > kernel: [ 4.640258] [<ffffffff813efe0f>] acpi_walk_namespace+0x98/0xcb > > kernel: [ 4.640261] [<ffffffff813d4d5f>] acpi_get_child+0x45/0x4f > > kernel: [ 4.640266] [<ffffffff814dceeb>] ata_ap_acpi_handle+0x2b/0x30 > > kernel: [ 4.640268] [<ffffffff814dd1cb>] ata_acpi_gtm+0x2b/0x100 > > kernel: [ 4.640271] [<ffffffff814e07bc>] pacpi_set_piomode+0x5c/0x70 > > kernel: [ 4.640274] [<ffffffff814e0816>] pacpi_qc_issue+0x46/0x80 > > kernel: [ 4.640278] [<ffffffff814c73b3>] ata_qc_issue+0x173/0x380 > > kernel: [ 4.640282] [<ffffffff814cd470>] ? > > ata_scsi_set_sense.constprop.24+0x30/0x30 > > kernel: [ 4.640285] [<ffffffff814cc097>] ata_scsi_translate+0xa7/0x180 > > kernel: [ 4.640287] [<ffffffff814d0259>] ata_scsi_queuecmd+0xa9/0x2b0 > > kernel: [ 4.640291] [<ffffffff814a342e>] scsi_dispatch_cmd+0xde/0x2c0 > > kernel: [ 4.640294] [<ffffffff814aae70>] scsi_request_fn+0x350/0x560 > > kernel: [ 4.640298] [<ffffffff81768b1d>] ? > > call_function_single_interrupt+0x6d/0x80 > > kernel: [ 4.640302] [<ffffffff8133e1c7>] __blk_run_queue+0x37/0x50 > > kernel: [ 4.640304] [<ffffffff814a9ef9>] scsi_run_queue+0x179/0x2b0 > > kernel: [ 4.640310] [<ffffffff81464ce7>] ? put_device+0x17/0x20 > > kernel: [ 4.640314] [<ffffffff814ab462>] scsi_next_command+0x42/0x60 > > kernel: [ 4.640316] [<ffffffff814ab6ce>] scsi_io_completion+0x1ee/0x6c0 > > kernel: [ 4.640319] [<ffffffff814a166d>] scsi_finish_command+0xbd/0x120 > > kernel: [ 4.640322] [<ffffffff814ab3ee>] scsi_softirq_done+0x13e/0x150 > > kernel: [ 4.640328] [<ffffffff81344ce3>] blk_done_softirq+0x83/0xa0 > > kernel: [ 4.640333] [<ffffffff81061aef>] __do_softirq+0xcf/0x210 > > kernel: [ 4.640338] [<ffffffff8103b948>] ? ack_apic_level+0x78/0x130 > > kernel: [ 4.640340] [<ffffffff8176905c>] call_softirq+0x1c/0x30 > > kernel: [ 4.640349] [<ffffffff810161b5>] do_softirq+0x75/0xb0 > > kernel: [ 4.640352] [<ffffffff81061da5>] irq_exit+0xa5/0xb0 > > kernel: [ 4.640355] [<ffffffff817698f3>] do_IRQ+0x63/0xe0 > > kernel: [ 4.640358] [<ffffffff8175f9ad>] common_interrupt+0x6d/0x6d > > kernel: [ 4.640360] <EOI> [<ffffffff817633f4>] ? > > __do_page_fault+0x264/0x4e0 > > kernel: [ 4.640366] [<ffffffff817633ec>] ? __do_page_fault+0x25c/0x4e0 > > kernel: [ 4.640369] [<ffffffff81086bda>] ? lg_local_unlock+0x1a/0x20 > > kernel: [ 4.640374] [<ffffffff811ab116>] ? mntput+0x26/0x40 > > kernel: [ 4.640378] [<ffffffff8118d9fe>] ? __fput+0x16e/0x240 > > kernel: [ 4.640381] [<ffffffff8118dade>] ? ____fput+0xe/0x10 > > kernel: [ 4.640385] [<ffffffff8107af71>] ? task_work_run+0xc1/0xe0 > > kernel: [ 4.640388] [<ffffffff8176367e>] do_page_fault+0xe/0x10 > > kernel: [ 4.640390] [<ffffffff8175fc98>] page_fault+0x28/0x30 > > > > -- > > Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email > > ------- You are receiving this mail because: ------- > > You are watching the assignee of the bug. -- tejun ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Bug 56781] New: BUG: scheduling while atomic: modprobe/256/0x00000100 2013-04-18 18:32 ` [Bug 56781] New: BUG: scheduling while atomic: modprobe/256/0x00000100 Tejun Heo @ 2013-04-19 8:58 ` Aaron Lu 0 siblings, 0 replies; 2+ messages in thread From: Aaron Lu @ 2013-04-19 8:58 UTC (permalink / raw) To: Tejun Heo; +Cc: Rusty Russell, bugzilla-daemon, Jeff Garzik, linux-ide On 04/19/2013 02:32 AM, Tejun Heo wrote: > Hello, > > (cc'ing Jeff, linux-ide and copying the whole message) > > So, the problem seems to be inside pata_acpi driver. It's calling > pacpi_set_piomode() from qc_issue path while holding the queue lock. > pacpi_set_piomode() calls into acpi which may sleep. It gets blocked > on a semaphore and triggers the bug. Maybe some changes between 3.8.6 > and 3.8.8 made it more likely to trigger but fundamentally it's a bug > in the pata_acpi driver. It can't directly call into acpi while > holding queue lock. The ata acpi code to get port's handle used to not block, but since the rework to bind ata handle to scsi device tree, it is now. I didn't check how much work is required to modify the pata acpi driver to solve the problem, but I have written a patch to make ata_ap_acpi_handle(which ata_acpi_gtm calls) does not block, and so should be able to fix this problem. I'll attach that patch to the bug page too for the reporter to test soon. Patch here, not tested: drivers/ata/libata-acpi.c | 44 ++++++++++++++++++++++++++------------------ 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 1c33f78..0e6cf89 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -60,7 +60,7 @@ acpi_handle ata_ap_acpi_handle(struct ata_port *ap) if (ap->flags & ATA_FLAG_ACPI_SATA) return NULL; - return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), ap->port_no); + return ACPI_HANDLE(ap->host->dev); } EXPORT_SYMBOL(ata_ap_acpi_handle); @@ -239,28 +239,15 @@ void ata_acpi_dissociate(struct ata_host *host) } } -/** - * ata_acpi_gtm - execute _GTM - * @ap: target ATA port - * @gtm: out parameter for _GTM result - * - * Evaluate _GTM and store the result in @gtm. - * - * LOCKING: - * EH context. - * - * RETURNS: - * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. - */ -int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) +static int __ata_acpi_gtm(struct ata_port *ap, acpi_handle handle, + struct ata_acpi_gtm *gtm) { struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; union acpi_object *out_obj; acpi_status status; int rc = 0; - status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_GTM", NULL, - &output); + status = acpi_evaluate_object(handle, "_GTM", NULL, &output); rc = -ENOENT; if (status == AE_NOT_FOUND) @@ -294,6 +281,27 @@ int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) return rc; } +/** + * ata_acpi_gtm - execute _GTM + * @ap: target ATA port + * @gtm: out parameter for _GTM result + * + * Evaluate _GTM and store the result in @gtm. + * + * LOCKING: + * EH context. + * + * RETURNS: + * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. + */ +int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) +{ + if (ata_ap_acpi_handle(ap)) + return __ata_acpi_gtm(ap, ata_ap_acpi_handle(ap), gtm); + else + return -EINVAL; +} + EXPORT_SYMBOL_GPL(ata_acpi_gtm); /** @@ -1047,7 +1055,7 @@ static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle) if (!*handle) return -ENODEV; - if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) + if (__ata_acpi_gtm(ap, *handle, &ap->__acpi_init_gtm) == 0) ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; return 0; -- 1.8.2.1 Thanks, Aaron ^ permalink raw reply related [flat|nested] 2+ messages in thread
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[not found] <bug-56781-12015@https.bugzilla.kernel.org/>
[not found] ` <87zjww2w3x.fsf@rustcorp.com.au>
2013-04-18 18:32 ` [Bug 56781] New: BUG: scheduling while atomic: modprobe/256/0x00000100 Tejun Heo
2013-04-19 8:58 ` Aaron Lu
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