Messages in this thread | | | Date | Wed, 6 Jul 2011 22:10:16 +0100 | Subject | PROBLEM: 3.0-rc kernels unbootable since -rc3 | From | julie Sullivan <> |
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None of my kernels after 3.0-rc3 will boot on my Dell XPS-M1730 (x86-64 2-core) test box running Ubuntu (Kubuntu) 11.04 (i.e. the first unbootable one was -rc4). The machine freezes immediately after selecting the kernel from the bootloader menu, leaving me with a blank blue screen so I can't give you any log messages.
It bisects to the following commit:
commit a46e0899eec7a3069bcadd45dfba7bf67c6ed016 Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Date: Wed Jun 15 15:47:09 2011 -0700
rcu: use softirq instead of kthreads except when RCU_BOOST=y
This patch #ifdefs RCU kthreads out of the kernel unless RCU_BOOST=y, thus eliminating context-switch overhead if RCU priority boosting has not been configured.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
I've tried cherry-picking onto good/reverting from bad but I don't know what to do with the merge conflicts, somebody who knows the code/design needs to look really. There are more changes than a couple of simple #ifdefs.
Let me know if you need any further info.
The config of the bad kernel will follow in next email, while you're waiting here's some nice environment info from a good kernel bisected nearest to the offending commit for you to enjoy looking at :-)
---------- ver_linux: Linux julie-MXG071 3.0.0-rc2-bisect-8+ #11 SMP Tue Jul 5 20:50:02 BST 2011 x86_64 x86_64 x86_64 GNU/Linux
Gnu C 4.5.2 Gnu make 3.81 binutils 2.21.0.20110327 util-linux 2.17.2 mount support module-init-tools 3.12 e2fsprogs 1.41.14 pcmciautils 015 Linux C Library 2.13 Dynamic linker (ldd) 2.13 Procps 3.2.8 Net-tools 1.60 Kbd 1.15 Sh-utils 8.5 wireless-tools 30 Modules Loaded nouveau uvcvideo r852 sm_common videodev iwl4965 nand nand_ids dell_wmi sdhci_pci sdhci nand_ecc firewire_ohci mtd dell_laptop v4l2_compat_ioctl32 mmc_core firewire_core ttm iwl_legacy drm_kms_helper mxm_wmi intel_agp intel_gtt
------------------ cat /proc/cpuinfo: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz stepping : 6 cpu MHz : 2401.000 cache size : 3072 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm ida dts tpr_shadow vnmi flexpriority bogomips : 4787.29 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz stepping : 6 cpu MHz : 800.000 cache size : 3072 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm ida dts tpr_shadow vnmi flexpriority bogomips : 4787.46 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
------------------ cat /proc/modules: nouveau 555654 2 - Live 0xffffffffa0124000 uvcvideo 56906 0 - Live 0xffffffffa0115000 r852 10128 0 - Live 0xffffffffa0058000 sm_common 7684 1 r852, Live 0xffffffffa002e000 videodev 73451 1 uvcvideo, Live 0xffffffffa0102000 iwl4965 155443 0 - Live 0xffffffffa00db000 nand 41249 2 r852,sm_common, Live 0xffffffffa006d000 nand_ids 5858 1 nand, Live 0xffffffffa0017000 dell_wmi 1625 0 - Live 0xffffffffa0010000 sdhci_pci 8832 0 - Live 0xffffffffa002a000 sdhci 22896 1 sdhci_pci, Live 0xffffffffa0023000 nand_ecc 3888 1 nand, Live 0xffffffffa0009000 firewire_ohci 26259 0 - Live 0xffffffffa00d3000 mtd 28256 2 sm_common,nand, Live 0xffffffffa00c7000 dell_laptop 8899 0 - Live 0xffffffffa00c0000 v4l2_compat_ioctl32 7213 1 videodev, Live 0xffffffffa00bb000 mmc_core 76861 1 sdhci, Live 0xffffffffa009f000 firewire_core 51699 1 firewire_ohci, Live 0xffffffffa008b000 ttm 58297 1 nouveau, Live 0xffffffffa005d000 iwl_legacy 122602 1 iwl4965, Live 0xffffffffa0033000 drm_kms_helper 26926 1 nouveau, Live 0xffffffffa001b000 mxm_wmi 1695 1 nouveau, Live 0xffffffffa0013000 intel_agp 11475 0 - Live 0xffffffffa000c000 intel_gtt 14036 1 intel_agp, Live 0xffffffffa0004000
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