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Message-ID: <201008041016.09176.tvrtko.ursulin@sophos.com> Date: Wed, 4 Aug 2010 10:16:08 +0100 From: Tvrtko Ursulin <tvrtko.ursulin@...hos.com> To: Yinghai Lu <yinghai@...nel.org> CC: Avi Kivity <avi@...hat.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, KVM list <kvm@...r.kernel.org>, "Eric W. Biederman" <ebiederm@...ssion.com> Subject: Re: 2.6.35 hangs on early boot in KVM On Wednesday 04 Aug 2010 10:05:36 Yinghai Lu wrote: > On 08/04/2010 01:18 AM, Tvrtko Ursulin wrote: > > On Tuesday 03 Aug 2010 21:57:48 Yinghai Lu wrote: > >> On Tue, Aug 3, 2010 at 8:59 AM, Tvrtko Ursulin > >> > >> <tvrtko.ursulin@...hos.com> wrote: > >>> On Tuesday 03 Aug 2010 16:17:20 Tvrtko Ursulin wrote: > >>>> On Tuesday 03 Aug 2010 15:57:03 Tvrtko Ursulin wrote: > >>>>> On Tuesday 03 Aug 2010 15:51:08 Avi Kivity wrote: > >>>>>> On 08/03/2010 12:28 PM, Tvrtko Ursulin wrote: > >>>>>>> I have basically built 2.6.35 with make oldconfig from a working > >>>>>>> 2.6.34. Latter works fine in kvm while 2.6.35 hangs very early. I > >>>>>>> see nothing after grub (have early printk and verbose bootup > >>>>>>> enabled), just a blinking VGA cursor and CPU at 100%. > >>>>>> > >>>>>> Please copy kvm@...r.kernel.org on kvm issues. > >>>>>> > >>>>>>> CONFIG_PRINTK_TIME=y > >>>>>> > >>>>>> Try disabling this as a workaround. > >>>>> > >>>>> I am in the middle of a bisect run with five builds left to go, > >>>>> currently I have: > >>>>> > >>>>> bad 537b60d17894b7c19a6060feae40299d7109d6e7 > >>>>> good 93c9d7f60c0cb7715890b1f9e159da6f4d1f5a65 > >>>> > >>>> Bisect is looking good, narrowed it to ten revisions, but I am not > >>>> sure to make it to the end today: > >>>> > >>>> bad cb41838bbc4403f7270a94b93a9a0d9fc9c2e7ea > >>>> good 41d59102e146a4423a490b8eca68a5860af4fe1c > >>> > >>> Bisect points the finger to "x86, ioapic: In mpparse use > >>> mp_register_ioapic" (cf7500c0ea133d66f8449d86392d83f840102632), so I am > >>> copying Eric. No idea whether this commit is solely to blame or it is a > >>> combined interaction with KVM, but I am sure you guys will know. > >>> > >>> If you want me to test something else please shout. > >> > >> please try attached patch, to see if it help. > > > > No luck (no visible difference, no output on VGA or serial console). (Btw > > there is a typo in pin_2_irq_leagcy so that you do not push it directly). > > can you try current tip with > earlyprintk=ttyS0,115200 or console=uart8250,io,0x3f8,115200? Not the tip but 2.6.35 with earlyprintk=ttyS0,115200: [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 2.6.35 (root@...-ktest-32) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #4 SMP Wed Aug 4 09:15:10 BST 2010 [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f400 (usable) [ 0.000000] BIOS-e820: 000000000009f400 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 000000002bbfd000 (usable) [ 0.000000] BIOS-e820: 000000002bbfd000 - 000000002bc00000 (reserved) [ 0.000000] BIOS-e820: 00000000fffbc000 - 0000000100000000 (reserved) [ 0.000000] bootconsole [earlyser0] enabled [ 0.000000] Notice: NX (Execute Disable) protection cannot be enabled: non-PAE kernel! [ 0.000000] DMI 2.4 present. [ 0.000000] last_pfn = 0x2bbfd max_arch_pfn = 0x100000 [ 0.000000] PAT not supported by CPU. [ 0.000000] Scanning 1 areas for low memory corruption [ 0.000000] modified physical RAM map: [ 0.000000] modified: 0000000000000000 - 0000000000001000 (reserved) [ 0.000000] modified: 0000000000001000 - 0000000000002000 (usable) [ 0.000000] modified: 0000000000002000 - 0000000000010000 (reserved) [ 0.000000] modified: 0000000000010000 - 000000000009f400 (usable) [ 0.000000] modified: 000000000009f400 - 00000000000a0000 (reserved) [ 0.000000] modified: 00000000000f0000 - 0000000000100000 (reserved) [ 0.000000] modified: 0000000000100000 - 000000002bbfd000 (usable) [ 0.000000] modified: 000000002bbfd000 - 000000002bc00000 (reserved) [ 0.000000] modified: 00000000fffbc000 - 0000000100000000 (reserved) [ 0.000000] found SMP MP-table at [c00f85c0] f85c0 [ 0.000000] init_memory_mapping: 0000000000000000-000000002bbfd000 [ 0.000000] RAMDISK: 1fa29000 - 20d3e000 [ 0.000000] 699MB LOWMEM available. [ 0.000000] mapped low ram: 0 - 2bbfd000 [ 0.000000] low ram: 0 - 2bbfd000 [ 0.000000] kvm-clock: Using msrs 12 and 11 [ 0.000000] kvm-clock: cpu 0, msr 0:82a341, boot clock [ 0.000000] Zone PFN ranges: [ 0.000000] DMA 0x00000001 -> 0x00001000 [ 0.000000] Normal 0x00001000 -> 0x0002bbfd [ 0.000000] Movable zone start PFN for each node [ 0.000000] early_node_map[3] active PFN ranges [ 0.000000] 0: 0x00000001 -> 0x00000002 [ 0.000000] 0: 0x00000010 -> 0x0000009f [ 0.000000] 0: 0x00000100 -> 0x0002bbfd [ 0.000000] Using APIC driver default [ 0.000000] Intel MultiProcessor Specification v1.4 [ 0.000000] Virtual Wire compatibility mode. [ 0.000000] MPTABLE: OEM ID: BOCHSCPU [ 0.000000] MPTABLE: Product ID: 0.1 [ 0.000000] MPTABLE: APIC at: 0xFEE00000 [ 0.000000] Processor #0 (Bootup-CPU) [ 0.000000] I/O APIC #1 Version 17 at 0xFEC00000. [ 0.000000] BUG: unable to handle kernel paging request at ffffb030 [ 0.000000] IP: [<c011d136>] native_apic_mem_read+0x16/0x20 [ 0.000000] *pde = 00832067 *pte = 00000000 [ 0.000000] Oops: 0000 [#1] SMP [ 0.000000] last sysfs file: [ 0.000000] Modules linked in: [ 0.000000] [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.35 #4 /Bochs [ 0.000000] EIP: 0060:[<c011d136>] EFLAGS: 00010093 CPU: 0 [ 0.000000] EIP is at native_apic_mem_read+0x16/0x20 [ 0.000000] EAX: ffffb030 EBX: 00000001 ECX: c061f220 EDX: fffff000 [ 0.000000] ESI: 00000001 EDI: 00000000 EBP: c060bde8 ESP: c060bde4 [ 0.000000] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 0.000000] Process swapper (pid: 0, ti=c060b000 task=c061f220 task.ti=c060b000) [ 0.000000] Stack: [ 0.000000] c011c352 c060be34 c0686380 c0598971 00000000 00000000 c060be1a 00000000 [ 0.000000] <0> 00005000 00000046 c0124548 c01247e8 c060be28 c012a95c 00000005 00000000 [ 0.000000] <0> 00000001 00000000 00000000 00000001 c060be3c c0686502 c060be6c c06865ce [ 0.000000] Call Trace: [ 0.000000] [<c011c352>] ? get_physical_broadcast+0x22/0x50 [ 0.000000] [<c0686380>] ? io_apic_get_unique_id+0x78/0x1d1 [ 0.000000] [<c0124548>] ? native_set_pte_at+0x8/0x10 [ 0.000000] [<c01247e8>] ? native_flush_tlb_single+0x8/0x10 [ 0.000000] [<c012a95c>] ? set_pte_vaddr+0x6c/0x80 [ 0.000000] [<c0686502>] ? io_apic_unique_id+0x29/0x2b [ 0.000000] [<c06865ce>] ? mp_register_ioapic+0xca/0x11a [ 0.000000] [<c0683bfb>] ? MP_ioapic_info+0x44/0x4a [ 0.000000] [<c0684158>] ? default_get_smp_config+0x334/0x490 [ 0.000000] [<c068ff6c>] ? free_area_init_nodes+0x30c/0x314 [ 0.000000] [<c03e5599>] ? read_pci_config_16+0x9/0x40 [ 0.000000] [<c067cab7>] ? setup_arch+0xa04/0xa5e [ 0.000000] [<c0144e15>] ? vprintk+0x375/0x480 [ 0.000000] [<c01758db>] ? trace_hardirqs_off+0xb/0x10 [ 0.000000] [<c048fe0d>] ? _raw_spin_unlock_irqrestore+0x5d/0x70 [ 0.000000] [<c0679714>] ? start_kernel+0xdc/0x378 [ 0.000000] [<c06790d7>] ? i386_start_kernel+0xd7/0xdf [ 0.000000] Code: 4c 62 c0 8d 84 08 00 c0 ff ff 89 10 5d c3 8d b4 26 00 00 00 00 55 89 e5 e8 64 65 fe ff 8b 15 cc 4c 62 c0 5d 8d 84 10 00 c0 ff ff <8b> 00 c3 8d b4 26 00 00 00 00 55 89 e5 53 e8 43 65 fe ff 8b 15 [ 0.000000] EIP: [<c011d136>] native_apic_mem_read+0x16/0x20 SS:ESP 0068:c060bde4 [ 0.000000] CR2: 00000000ffffb030 [ 0.000000] ---[ end trace a7919e7f17c0a725 ]--- [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task! [ 0.000000] Pid: 0, comm: swapper Tainted: G D 2.6.35 #4 [ 0.000000] Call Trace: [ 0.000000] [<c048c225>] ? printk+0x1d/0x20 [ 0.000000] [<c048c18b>] panic+0x5a/0xd7 [ 0.000000] [<c0148b19>] do_exit+0x7a9/0x840 [ 0.000000] [<c0145059>] ? kmsg_dump+0x139/0x160 [ 0.000000] [<c048c225>] ? printk+0x1d/0x20 [ 0.000000] [<c0106b15>] oops_end+0x95/0xd0 [ 0.000000] [<c0125dc6>] no_context+0xc6/0x160 [ 0.000000] [<c0125f10>] __bad_area_nosemaphore+0xb0/0x160 [ 0.000000] [<c01245e8>] ? _paravirt_ident_32+0x8/0x10 [ 0.000000] [<c0125fd7>] bad_area_nosemaphore+0x17/0x20 [ 0.000000] [<c0126269>] do_page_fault+0xb9/0x410 [ 0.000000] [<c01261b0>] ? do_page_fault+0x0/0x410 [ 0.000000] [<c0490864>] error_code+0x78/0x80 [ 0.000000] [<c017007b>] ? timer_list_show+0x7cb/0xf00 [ 0.000000] [<c011d136>] ? native_apic_mem_read+0x16/0x20 [ 0.000000] [<c011c352>] ? get_physical_broadcast+0x22/0x50 [ 0.000000] [<c0686380>] io_apic_get_unique_id+0x78/0x1d1 [ 0.000000] [<c0124548>] ? native_set_pte_at+0x8/0x10 [ 0.000000] [<c01247e8>] ? native_flush_tlb_single+0x8/0x10 [ 0.000000] [<c012a95c>] ? set_pte_vaddr+0x6c/0x80 [ 0.000000] [<c0686502>] io_apic_unique_id+0x29/0x2b [ 0.000000] [<c06865ce>] mp_register_ioapic+0xca/0x11a [ 0.000000] [<c0683bfb>] MP_ioapic_info+0x44/0x4a [ 0.000000] [<c0684158>] default_get_smp_config+0x334/0x490 [ 0.000000] [<c068ff6c>] ? free_area_init_nodes+0x30c/0x314 [ 0.000000] [<c03e5599>] ? read_pci_config_16+0x9/0x40 [ 0.000000] [<c067cab7>] setup_arch+0xa04/0xa5e [ 0.000000] [<c0144e15>] ? vprintk+0x375/0x480 [ 0.000000] [<c01758db>] ? trace_hardirqs_off+0xb/0x10 [ 0.000000] [<c048fe0d>] ? _raw_spin_unlock_irqrestore+0x5d/0x70 [ 0.000000] [<c0679714>] start_kernel+0xdc/0x378 [ 0.000000] [<c06790d7>] i386_start_kernel+0xd7/0xdf [ 0.000000] Unknown interrupt or fault at: 00000246 00000060 c012422a [ 0.000000] Pid: 0, comm: swapper Tainted: G D 2.6.35 #4 [ 0.000000] Call Trace: [ 0.000000] [<c048c225>] ? printk+0x1d/0x20 [ 0.000000] [<c04844c1>] ignore_int+0x3d/0x46 [ 0.000000] [<c012422a>] ? native_irq_enable+0xa/0x10 [ 0.000000] [<c048c1f6>] ? panic+0xc5/0xd7 [ 0.000000] [<c048c1f6>] ? panic+0xc5/0xd7 [ 0.000000] [<c012422a>] ? native_irq_enable+0xa/0x10 [ 0.000000] [<c048c1fc>] ? panic+0xcb/0xd7 [ 0.000000] [<c0148b19>] do_exit+0x7a9/0x840 [ 0.000000] [<c0145059>] ? kmsg_dump+0x139/0x160 [ 0.000000] [<c048c225>] ? printk+0x1d/0x20 [ 0.000000] [<c0106b15>] oops_end+0x95/0xd0 [ 0.000000] [<c0125dc6>] no_context+0xc6/0x160 [ 0.000000] [<c0125f10>] __bad_area_nosemaphore+0xb0/0x160 [ 0.000000] [<c01245e8>] ? _paravirt_ident_32+0x8/0x10 [ 0.000000] [<c0125fd7>] bad_area_nosemaphore+0x17/0x20 [ 0.000000] [<c0126269>] do_page_fault+0xb9/0x410 [ 0.000000] [<c01261b0>] ? do_page_fault+0x0/0x410 [ 0.000000] [<c0490864>] error_code+0x78/0x80 [ 0.000000] [<c017007b>] ? timer_list_show+0x7cb/0xf00 [ 0.000000] [<c011d136>] ? native_apic_mem_read+0x16/0x20 [ 0.000000] [<c011c352>] ? get_physical_broadcast+0x22/0x50 [ 0.000000] [<c0686380>] io_apic_get_unique_id+0x78/0x1d1 [ 0.000000] [<c0124548>] ? native_set_pte_at+0x8/0x10 [ 0.000000] [<c01247e8>] ? native_flush_tlb_single+0x8/0x10 [ 0.000000] [<c012a95c>] ? set_pte_vaddr+0x6c/0x80 [ 0.000000] [<c0686502>] io_apic_unique_id+0x29/0x2b [ 0.000000] [<c06865ce>] mp_register_ioapic+0xca/0x11a [ 0.000000] [<c0683bfb>] MP_ioapic_info+0x44/0x4a [ 0.000000] [<c0684158>] default_get_smp_config+0x334/0x490 [ 0.000000] [<c068ff6c>] ? free_area_init_nodes+0x30c/0x314 [ 0.000000] [<c03e5599>] ? read_pci_config_16+0x9/0x40 [ 0.000000] [<c067cab7>] setup_arch+0xa04/0xa5e [ 0.000000] [<c0144e15>] ? vprintk+0x375/0x480 [ 0.000000] [<c01758db>] ? trace_hardirqs_off+0xb/0x10 [ 0.000000] [<c048fe0d>] ? _raw_spin_unlock_irqrestore+0x5d/0x70 [ 0.000000] [<c0679714>] start_kernel+0xdc/0x378 [ 0.000000] [<c06790d7>] i386_start_kernel+0xd7/0xdf Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. 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