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Message-ID: <4C593424.4080603@kernel.org> Date: Wed, 04 Aug 2010 02:34:28 -0700 From: Yinghai Lu <yinghai@...nel.org> To: Tvrtko Ursulin <tvrtko.ursulin@...hos.com> 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 08/04/2010 02:16 AM, Tvrtko Ursulin wrote: > 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. so your host is 32bit or 64bit? can you use working 32bit guest to dump mptable like "debug apic=debug acpi=off earlyprintk..." ? Yinghai -- 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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