Re: [iwlwifi] BUG: unable to handle kernel
On Thu, 2014-12-18 at 09:13 -0800, Fengguang Wu wrote: Hi All, I don't see any relationship between the BUG and this bisected commit. Anyway, it's better to report it to the lists than to ignore. Right - but I have to say that I have no clue how this comment can cause the bug you are seeing... Do you even have an Intel Wireless device the VM could access? git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes.git master commit 03d6c3b0fa4f5f0379cede079ec828a6c999fe43 Author: Emmanuel Grumbach emmanuel.grumb...@intel.com AuthorDate: Wed Dec 3 10:39:07 2014 +0200 Commit: Emmanuel Grumbach emmanuel.grumb...@intel.com CommitDate: Sun Dec 14 10:20:29 2014 +0200 iwlwifi: pcie: re-ACK all interrupts after device reset When we reset the device, the CSR_INT gets cleared as well as CSR_INT_MASK. Meaning that we shouldn't get any interrupt but, due to a hardware bug, recent devices will keep sending interrupts. This leads to an interrupt storm while stopping the device. The way to fix this is to ACK all the interrupts after the device is reset so that the value of CSR_INT will stay 0x. Fixes: 522713c81e4e (iwlwifi: pcie: properly reset the device) Signed-off-by: Emmanuel Grumbach emmanuel.grumb...@intel.com +--++++ | | 0a79a0c011 | 03d6c3b0fa | iwlwifi-fi | +--++++ | boot_successes | 60 | 19 | 3 | | boot_failures| 0 | 1 | 9 | | BUG:unable_to_handle_kernel | 0 | 1 | 9 | | Oops | 0 | 1 | 9 | | RIP:strcmp | 0 | 1 | 9 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 1 | 9 | | backtrace:led_trigger_register_simple| 0 | 1 | 9 | | backtrace:ledtrig_usb_init | 0 | 1 | 9 | | backtrace:kernel_init_freeable | 0 | 1 | 9 | +--++++ [5.345018] g_serial gadget: Gadget Serial v2.4 [5.345927] g_serial gadget: g_serial ready [5.345927] g_serial gadget: g_serial ready [5.346777] BUG: unable to handle kernel [5.346777] BUG: unable to handle kernel paging requestpaging request at 8804e5f0 at 8804e5f0 [5.348183] IP: [5.348183] IP: [81446a68] strcmp+0x6/0x20 [81446a68] strcmp+0x6/0x20 [5.349183] PGD 37f1067 [5.349183] PGD 37f1067 PUD 37f2067 PUD 37f2067 PMD 37f3067 PMD 37f3067 PTE 8004e060PTE 8004e060 [5.350498] Oops: [#1] [5.350498] Oops: [#1] DEBUG_PAGEALLOCDEBUG_PAGEALLOC [5.351360] CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-g03d6c3b #1 [5.351360] CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-g03d6c3b #1 [5.352660] task: 88001206 ti: 88001204c000 task.ti: 88001204c000 [5.352660] task: 88001206 ti: 88001204c000 task.ti: 88001204c000 [5.354143] RIP: 0010:[81446a68] [5.354143] RIP: 0010:[81446a68] [81446a68] strcmp+0x6/0x20 [81446a68] strcmp+0x6/0x20 [5.354451] RSP: :88001204fe28 EFLAGS: 00010246 [5.354451] RSP: :88001204fe28 EFLAGS: 00010246 [5.354451] RAX: RBX: 88000c08fe00 RCX: 81d35310 [5.354451] RAX: RBX: 88000c08fe00 RCX: 81d35310 [5.354451] RDX: 88000c08fe68 RSI: 826d05be RDI: 8804e5f0 [5.354451] RDX: 88000c08fe68 RSI: 826d05be RDI: 8804e5f0 [5.354451] RBP: 88001204fe28 R08: 0001 R09: 033a [5.354451] RBP: 88001204fe28 R08: 0001 R09: 033a [5.354451] R10: R11: 82531cd1 R12: 88000c19fa00 [5.354451] R10: R11: 82531cd1 R12: 88000c19fa00 [5.354451] R13: R14: 837958b8 R15: [5.354451] R13: R14: 837958b8 R15: [5.354451] FS: () GS:82789000() knlGS: [5.354451] FS: () GS:82789000() knlGS: [5.354451] CS: 0010 DS: ES: CR0: 8005003b [5.354451] CS: 0010 DS: ES: CR0: 8005003b [5.354451] CR2: 8804e5f0 CR3: 02776000 CR4: 06b0 [
Re: [iwlwifi] BUG: unable to handle kernel
On Fri, Dec 19, 2014 at 03:42:17AM +0800, Grumbach, Emmanuel wrote: On Thu, 2014-12-18 at 09:13 -0800, Fengguang Wu wrote: Hi All, I don't see any relationship between the BUG and this bisected commit. Anyway, it's better to report it to the lists than to ignore. Right - but I have to say that I have no clue how this comment can cause the bug you are seeing... s?comment?commit? Do you even have an Intel Wireless device the VM could access? Nope. It's simple QEMU virtual machine boot test. Thanks, Fengguang git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes.git master commit 03d6c3b0fa4f5f0379cede079ec828a6c999fe43 Author: Emmanuel Grumbach emmanuel.grumb...@intel.com AuthorDate: Wed Dec 3 10:39:07 2014 +0200 Commit: Emmanuel Grumbach emmanuel.grumb...@intel.com CommitDate: Sun Dec 14 10:20:29 2014 +0200 iwlwifi: pcie: re-ACK all interrupts after device reset When we reset the device, the CSR_INT gets cleared as well as CSR_INT_MASK. Meaning that we shouldn't get any interrupt but, due to a hardware bug, recent devices will keep sending interrupts. This leads to an interrupt storm while stopping the device. The way to fix this is to ACK all the interrupts after the device is reset so that the value of CSR_INT will stay 0x. Fixes: 522713c81e4e (iwlwifi: pcie: properly reset the device) Signed-off-by: Emmanuel Grumbach emmanuel.grumb...@intel.com +--++++ | | 0a79a0c011 | 03d6c3b0fa | iwlwifi-fi | +--++++ | boot_successes | 60 | 19 | 3 | | boot_failures| 0 | 1 | 9 | | BUG:unable_to_handle_kernel | 0 | 1 | 9 | | Oops | 0 | 1 | 9 | | RIP:strcmp | 0 | 1 | 9 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 1 | 9 | | backtrace:led_trigger_register_simple| 0 | 1 | 9 | | backtrace:ledtrig_usb_init | 0 | 1 | 9 | | backtrace:kernel_init_freeable | 0 | 1 | 9 | +--++++ [5.345018] g_serial gadget: Gadget Serial v2.4 [5.345927] g_serial gadget: g_serial ready [5.345927] g_serial gadget: g_serial ready [5.346777] BUG: unable to handle kernel [5.346777] BUG: unable to handle kernel paging requestpaging request at 8804e5f0 at 8804e5f0 [5.348183] IP: [5.348183] IP: [81446a68] strcmp+0x6/0x20 [81446a68] strcmp+0x6/0x20 [5.349183] PGD 37f1067 [5.349183] PGD 37f1067 PUD 37f2067 PUD 37f2067 PMD 37f3067 PMD 37f3067 PTE 8004e060PTE 8004e060 [5.350498] Oops: [#1] [5.350498] Oops: [#1] DEBUG_PAGEALLOCDEBUG_PAGEALLOC [5.351360] CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-g03d6c3b #1 [5.351360] CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-g03d6c3b #1 [5.352660] task: 88001206 ti: 88001204c000 task.ti: 88001204c000 [5.352660] task: 88001206 ti: 88001204c000 task.ti: 88001204c000 [5.354143] RIP: 0010:[81446a68] [5.354143] RIP: 0010:[81446a68] [81446a68] strcmp+0x6/0x20 [81446a68] strcmp+0x6/0x20 [5.354451] RSP: :88001204fe28 EFLAGS: 00010246 [5.354451] RSP: :88001204fe28 EFLAGS: 00010246 [5.354451] RAX: RBX: 88000c08fe00 RCX: 81d35310 [5.354451] RAX: RBX: 88000c08fe00 RCX: 81d35310 [5.354451] RDX: 88000c08fe68 RSI: 826d05be RDI: 8804e5f0 [5.354451] RDX: 88000c08fe68 RSI: 826d05be RDI: 8804e5f0 [5.354451] RBP: 88001204fe28 R08: 0001 R09: 033a [5.354451] RBP: 88001204fe28 R08: 0001 R09: 033a [5.354451] R10: R11: 82531cd1 R12: 88000c19fa00 [5.354451] R10: R11: 82531cd1 R12: 88000c19fa00 [5.354451] R13: R14: 837958b8 R15: [5.354451] R13: R14: 837958b8 R15: [5.354451] FS: () GS:82789000() knlGS: [5.354451] FS: ()
Re: [iwlwifi] BUG: unable to handle kernel
On Thu, 2014-12-18 at 13:07 -0800, Fengguang Wu wrote: On Fri, Dec 19, 2014 at 03:42:17AM +0800, Grumbach, Emmanuel wrote: On Thu, 2014-12-18 at 09:13 -0800, Fengguang Wu wrote: Hi All, I don't see any relationship between the BUG and this bisected commit. Anyway, it's better to report it to the lists than to ignore. Right - but I have to say that I have no clue how this comment can cause the bug you are seeing... s?comment?commit? Yes :) Do you even have an Intel Wireless device the VM could access? Nope. It's simple QEMU virtual machine boot test. In that case - this just can't be right... Don't know what to say... Thanks, Fengguang git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes.git master commit 03d6c3b0fa4f5f0379cede079ec828a6c999fe43 Author: Emmanuel Grumbach emmanuel.grumb...@intel.com AuthorDate: Wed Dec 3 10:39:07 2014 +0200 Commit: Emmanuel Grumbach emmanuel.grumb...@intel.com CommitDate: Sun Dec 14 10:20:29 2014 +0200 iwlwifi: pcie: re-ACK all interrupts after device reset When we reset the device, the CSR_INT gets cleared as well as CSR_INT_MASK. Meaning that we shouldn't get any interrupt but, due to a hardware bug, recent devices will keep sending interrupts. This leads to an interrupt storm while stopping the device. The way to fix this is to ACK all the interrupts after the device is reset so that the value of CSR_INT will stay 0x. Fixes: 522713c81e4e (iwlwifi: pcie: properly reset the device) Signed-off-by: Emmanuel Grumbach emmanuel.grumb...@intel.com +--++++ | | 0a79a0c011 | 03d6c3b0fa | iwlwifi-fi | +--++++ | boot_successes | 60 | 19 | 3 | | boot_failures| 0 | 1 | 9 | | BUG:unable_to_handle_kernel | 0 | 1 | 9 | | Oops | 0 | 1 | 9 | | RIP:strcmp | 0 | 1 | 9 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 1 | 9 | | backtrace:led_trigger_register_simple| 0 | 1 | 9 | | backtrace:ledtrig_usb_init | 0 | 1 | 9 | | backtrace:kernel_init_freeable | 0 | 1 | 9 | +--++++ [5.345018] g_serial gadget: Gadget Serial v2.4 [5.345927] g_serial gadget: g_serial ready [5.345927] g_serial gadget: g_serial ready [5.346777] BUG: unable to handle kernel [5.346777] BUG: unable to handle kernel paging requestpaging request at 8804e5f0 at 8804e5f0 [5.348183] IP: [5.348183] IP: [81446a68] strcmp+0x6/0x20 [81446a68] strcmp+0x6/0x20 [5.349183] PGD 37f1067 [5.349183] PGD 37f1067 PUD 37f2067 PUD 37f2067 PMD 37f3067 PMD 37f3067 PTE 8004e060PTE 8004e060 [5.350498] Oops: [#1] [5.350498] Oops: [#1] DEBUG_PAGEALLOCDEBUG_PAGEALLOC [5.351360] CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-g03d6c3b #1 [5.351360] CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.0-g03d6c3b #1 [5.352660] task: 88001206 ti: 88001204c000 task.ti: 88001204c000 [5.352660] task: 88001206 ti: 88001204c000 task.ti: 88001204c000 [5.354143] RIP: 0010:[81446a68] [5.354143] RIP: 0010:[81446a68] [81446a68] strcmp+0x6/0x20 [81446a68] strcmp+0x6/0x20 [5.354451] RSP: :88001204fe28 EFLAGS: 00010246 [5.354451] RSP: :88001204fe28 EFLAGS: 00010246 [5.354451] RAX: RBX: 88000c08fe00 RCX: 81d35310 [5.354451] RAX: RBX: 88000c08fe00 RCX: 81d35310 [5.354451] RDX: 88000c08fe68 RSI: 826d05be RDI: 8804e5f0 [5.354451] RDX: 88000c08fe68 RSI: 826d05be RDI: 8804e5f0 [5.354451] RBP: 88001204fe28 R08: 0001 R09: 033a [5.354451] RBP: 88001204fe28 R08: 0001 R09: 033a [5.354451] R10: R11: 82531cd1 R12: 88000c19fa00 [5.354451] R10: R11: 82531cd1 R12: 88000c19fa00 [5.354451] R13: R14: 837958b8 R15:
