On 2014/11/16 11:22, Guenter Roeck wrote: > On 11/15/2014 06:33 PM, Jiang Liu wrote: >> Hi Guenter, >> Could you please help to provide the config file and >> error messages? > > Config file: > https://github.com/groeck/linux-build-test/blob/master/rootfs/x86/qemu_x86_pc_nosmp_defconfig > > > Error log: > http://server.roeck-us.net:8010/builders/qemu-x86-next/builds/44/steps/qemubuildcommand/logs/stdio > > > You can find the root file system used for the test as well as the test > script at > https://github.com/groeck/linux-build-test/tree/master/rootfs/x86 > > There isn't really an error message, though - the boot stalls until the > controlling daemon > kills the qemu session. Hi Guenter, With the test suite at https://github.com/groeck/linux-build-test/tree/master/rootfs/x86 and configuration file qemu_x86_pc_nosmp_defconfig, I have following findings: 1) disabling PCI_MSI, <OK>. 2) manually turning on X86_IO_APIC, <OK>. 3) with 3.16 kernel, disabling PCI_MSI, <OK> 4) with 3.16 kernel, disabling PCI_MSI, enabling X86_UP_APIC, <fail> So the root cause is that KVM doesn't support the configuration with LOCAL_APIC enabled but IO_APIC disabled, though this configuration works with bare-metal machines. There are two possible solutions here: 1) ALways enalbe IO_APIC if KVM is enabled. 2) Enhance KVM to support LOCAL_APIC when IOAPIC is disabled. But I'm not familiar with KVM and don't know how to achieve solution 2. Any suggestions? Regards! Gerry > > Guenter > >> Thanks! >> Gerry >> >> On 2014/11/16 5:19, Guenter Roeck wrote: >>> On Fri, Nov 14, 2014 at 07:27:38PM +1100, Stephen Rothwell wrote: >>>> Hi all, >>>> >>>> Changes since 20141113: >>>> >>>> New tree: overlayfs >>>> >>>> The idle tree gained a conflict against Linus' tree. >>>> >>>> The scsi tree gained a conflict against the usb tree. >>>> >>>> Non-merge commits (relative to Linus' tree): 6264 >>>> 6509 files changed, 209171 insertions(+), 167101 deletions(-) >>>> >>> >>> I bisected the x86-nosmp qemu runtime failure I have seen for >>> the last few days. Here is the result: >>> >>> bb46613f7099f70bc68c1c684cfa22d6863cd8eb is the first bad commit >>> commit bb46613f7099f70bc68c1c684cfa22d6863cd8eb >>> Author: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> >>> Date: Mon Oct 27 16:12:06 2014 +0800 >>> >>> x86, irq: Make MSI and HT_IRQ indepenent of X86_IO_APIC >>> >>> Detailed log: >>> >>> git bisect start 'HEAD' 'v3.18-rc4' >>> # good: [97bf3e2baed8f45432933bf15535061fb5acda44] Merge >>> remote-tracking branch 'sound-asoc/for-next' >>> git bisect good 97bf3e2baed8f45432933bf15535061fb5acda44 >>> # bad: [d23dcf93e7ad8004ef80726717f700316e53f44d] Merge >>> remote-tracking branch 'usb-serial/usb-next' >>> git bisect bad d23dcf93e7ad8004ef80726717f700316e53f44d >>> # bad: [cff78d32f4c15b7b2cb173c8e6097c513f406da0] Merge >>> remote-tracking branch 'kvm/linux-next' >>> git bisect bad cff78d32f4c15b7b2cb173c8e6097c513f406da0 >>> # good: [09dc3f20206821e06b1b281b1ae4451777f707c4] Merge >>> remote-tracking branch 'audit/next' >>> git bisect good 09dc3f20206821e06b1b281b1ae4451777f707c4 >>> # bad: [caf0fea9e728916a92c508988fd2ae84a08c280b] Merge branch >>> 'x86/vdso' >>> git bisect bad caf0fea9e728916a92c508988fd2ae84a08c280b >>> # good: [9aa5f98820067b00456c42347fc0ff48d2d2474f] Merge branch >>> 'sched/urgent' >>> git bisect good 9aa5f98820067b00456c42347fc0ff48d2d2474f >>> # bad: [46fe562d914fde0a43ee339a0fcfd4af829cb8f7] Merge branch >>> 'x86/boot' >>> git bisect bad 46fe562d914fde0a43ee339a0fcfd4af829cb8f7 >>> # good: [b26ea43d0bb1539ce047206a57c7fd8d636e7f22] x86, irq: Protect >>> __clear_irq_vector() with vector_lock >>> git bisect good b26ea43d0bb1539ce047206a57c7fd8d636e7f22 >>> # bad: [e1d8f79a27a41493c8f1ad0bde440048e17f9494] iommu/amd: Use >>> helpers to access irq_cfg data structure associated with IRQ >>> git bisect bad e1d8f79a27a41493c8f1ad0bde440048e17f9494 >>> # good: [051825cab15c8180f2f0dbc3a9de5a3db7476065] x86, irq: Move HT >>> IRQ related code from io_apic.c into htirq.c >>> git bisect good 051825cab15c8180f2f0dbc3a9de5a3db7476065 >>> # bad: [bb46613f7099f70bc68c1c684cfa22d6863cd8eb] x86, irq: Make MSI >>> and HT_IRQ indepenent of X86_IO_APIC >>> git bisect bad bb46613f7099f70bc68c1c684cfa22d6863cd8eb >>> # good: [b09198f7b59101e52bcf238ed3b7bfc64de055ef] x86, irq: Move IRQ >>> initialization routines from io_apic.c into vector.c >>> git bisect good b09198f7b59101e52bcf238ed3b7bfc64de055ef >>> # first bad commit: [bb46613f7099f70bc68c1c684cfa22d6863cd8eb] x86, >>> irq: Make MSI and HT_IRQ indepenent of X86_IO_APIC >>> >>> I'll be happy to provide the configuration if needed. >>> >>> Guenter >>> -- >>> To unsubscribe from this list: send the line "unsubscribe >>> linux-kernel" in >>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> Please read the FAQ at http://www.tux.org/lkml/ >>> >> > -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
