Date:	Sat, 29 Aug 2015 12:00:48 +0000 (UTC)
From:	Peter Weilbacher <newsspam@...lbacher.org>
To:	linux-kernel@...r.kernel.org
Subject: Problems booting 4.1.6

I've only recently upgraded the kernel from 4.0.5 to 4.1.6 and
since then I cannot boot my machine any more. It basically stops
after

  Decompressing Linux... Parsing ELF... done.
  Booting the kernel.

and if I wait long enough I'll see messages like

  INFO: rcu_sched self-detected stall on CPU { 3}
        (t=60000 jiffies g=-256 c=-257 q=193)
  rcu_sched kthread starved for 50027 jiffies!

I have basically used the same kernel config since about 3.2
which I have updated mostly with |make oldconfig|. Similarly,
I have used the same lilo config to boot since then, and only
changed the version strings in the filenames.

Up to 4.0.5 this worked fine and I can continue booting with
4.0.5 (I have two lilo entries for cases like this). All this
is on an older machine (Intel Core2 Quad) with a Gentoo
installation, and the (unpatched, "vanilla") kernel is built
and packaged using the genkernel script.

I would appreciate any pointers,
   Peter.

P.S.: Here are the kernel part of the lilo config (not sure
      any more where all those options came from!) and a diff
      of the two kernel configurations:

image=/boot/kernel-genkernel-x86_64-4.0.5
   label=Linux405
   read-only # read-only for checking
   root=/dev/ram0
   append="init=/linuxrc keymap=de ramdisk=8192 real_root=/dev/sda6
           splash=verbose,theme:default console=tty1 quiet
           radeon.modeset=1 video=radeon:mtrr:3,ywrap,1680x1050-32@60
           ahci.marvell_enable=0"
   initrd=/boot/initramfs-genkernel-x86_64-4.0.5

--- /etc/kernels/kernel-config-x86_64-4.0.5	2015-06-20 16:30:05.000000000 +0200
+++ /etc/kernels/kernel-config-x86_64-4.1.6	2015-08-23 12:02:15.000000000 +0200
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 4.0.5 Kernel Configuration
+# Linux/x86 4.1.6 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y
@@ -40,6 +40,7 @@
 CONFIG_ARCH_HWEIGHT_CFLAGS="-fcall-saved-rdi -fcall-saved-rsi
-fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9
-fcall-saved-r10 -fcall-saved-r11"
 CONFIG_ARCH_SUPPORTS_UPROBES=y
 CONFIG_FIX_EARLYCON_MEM=y
+CONFIG_PGTABLE_LEVELS=4
 CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
 CONFIG_IRQ_WORK=y
 CONFIG_BUILDTIME_EXTABLE_SORT=y
@@ -95,7 +96,6 @@
 CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE=y
 CONFIG_GENERIC_TIME_VSYSCALL=y
 CONFIG_GENERIC_CLOCKEVENTS=y
-CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
 CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
 CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y
 CONFIG_GENERIC_CMOS_UPDATE=y
@@ -139,6 +139,7 @@
 # CONFIG_TREE_RCU_TRACE is not set
 CONFIG_RCU_KTHREAD_PRIO=0
 # CONFIG_RCU_NOCB_CPU is not set
+# CONFIG_RCU_EXPEDITE_BOOT is not set
 CONFIG_BUILD_BIN2C=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
@@ -173,6 +174,7 @@
 CONFIG_HAVE_PCSPKR_PLATFORM=y
 CONFIG_BPF=y
 CONFIG_EXPERT=y
+CONFIG_MULTIUSER=y
 CONFIG_SGETMASK_SYSCALL=y
 CONFIG_SYSFS_SYSCALL=y
 # CONFIG_SYSCTL_SYSCALL is not set
@@ -249,9 +251,11 @@
 CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
 CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
 CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
+CONFIG_HAVE_ARCH_HUGE_VMAP=y
 CONFIG_HAVE_ARCH_SOFT_DIRTY=y
 CONFIG_MODULES_USE_ELF_RELA=y
 CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
+CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
 
 #
 # GCOV-based kernel profiling
@@ -341,7 +345,6 @@
 CONFIG_SCHED_OMIT_FRAME_POINTER=y
 # CONFIG_HYPERVISOR_GUEST is not set
 CONFIG_NO_BOOTMEM=y
-CONFIG_MEMTEST=y
 # CONFIG_MK8 is not set
 # CONFIG_MPSC is not set
 CONFIG_MCORE2=y
@@ -375,7 +378,6 @@
 # CONFIG_PREEMPT_NONE is not set
 CONFIG_PREEMPT_VOLUNTARY=y
 # CONFIG_PREEMPT is not set
-CONFIG_X86_UP_APIC_MSI=y
 CONFIG_X86_LOCAL_APIC=y
 CONFIG_X86_IO_APIC=y
 # CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS is not set
@@ -393,13 +395,11 @@
 CONFIG_MICROCODE_INTEL=y
 # CONFIG_MICROCODE_AMD is not set
 CONFIG_MICROCODE_OLD_INTERFACE=y
-# CONFIG_MICROCODE_INTEL_EARLY is not set
-# CONFIG_MICROCODE_AMD_EARLY is not set
 CONFIG_X86_MSR=m
 CONFIG_X86_CPUID=m
 CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
 CONFIG_ARCH_DMA_ADDR_T_64BIT=y
-CONFIG_DIRECT_GBPAGES=y
+CONFIG_X86_DIRECT_GBPAGES=y
 # CONFIG_NUMA is not set
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
 CONFIG_ARCH_SPARSEMEM_DEFAULT=y
@@ -439,6 +439,7 @@
 # CONFIG_ZBUD is not set
 # CONFIG_ZSMALLOC is not set
 CONFIG_GENERIC_EARLY_IOREMAP=y
+# CONFIG_X86_PMEM_LEGACY is not set
 # CONFIG_X86_CHECK_BIOS_CORRUPTION is not set
 CONFIG_X86_RESERVE_LOW=64
 CONFIG_MTRR=y
@@ -489,6 +490,7 @@
 CONFIG_ACPI=y
 CONFIG_ACPI_LEGACY_TABLES_LOOKUP=y
 CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC=y
+CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT=y
 CONFIG_ACPI_SLEEP=y
 # CONFIG_ACPI_PROCFS_POWER is not set
 # CONFIG_ACPI_EC_DEBUGFS is not set
@@ -587,6 +589,7 @@
 # CONFIG_PCIEASPM_POWERSAVE is not set
 # CONFIG_PCIEASPM_PERFORMANCE is not set
 CONFIG_PCIE_PME=y
+CONFIG_PCI_BUS_ADDR_T_64BIT=y
 CONFIG_PCI_MSI=y
 # CONFIG_PCI_DEBUG is not set
 # CONFIG_PCI_REALLOC_ENABLE_AUTO is not set
@@ -611,7 +614,6 @@
 # Executable file formats / Emulations
 #
 CONFIG_BINFMT_ELF=y
-CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE=y
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_SCRIPT=y
 # CONFIG_HAVE_AOUT is not set
@@ -904,7 +906,7 @@
 # CONFIG_VSOCKETS is not set
 # CONFIG_NETLINK_MMAP is not set
 # CONFIG_NETLINK_DIAG is not set
-# CONFIG_NET_MPLS_GSO is not set
+# CONFIG_MPLS is not set
 # CONFIG_HSR is not set
 # CONFIG_NET_SWITCHDEV is not set
 CONFIG_RPS=y
@@ -1003,6 +1005,7 @@
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=16
 CONFIG_BLK_DEV_RAM_SIZE=8192
+# CONFIG_BLK_DEV_PMEM is not set
 CONFIG_CDROM_PKTCDVD=m
 CONFIG_CDROM_PKTCDVD_BUFFERS=8
 # CONFIG_CDROM_PKTCDVD_WCACHE is not set
@@ -1212,6 +1215,7 @@
 # CONFIG_BCACHE is not set
 CONFIG_BLK_DEV_DM_BUILTIN=y
 CONFIG_BLK_DEV_DM=m
+# CONFIG_DM_MQ_DEFAULT is not set
 # CONFIG_DM_DEBUG is not set
 CONFIG_DM_CRYPT=m
 # CONFIG_DM_SNAPSHOT is not set
@@ -1227,6 +1231,7 @@
 # CONFIG_DM_FLAKEY is not set
 # CONFIG_DM_VERITY is not set
 # CONFIG_DM_SWITCH is not set
+# CONFIG_DM_LOG_WRITES is not set
 # CONFIG_TARGET_CORE is not set
 # CONFIG_FUSION is not set
 
@@ -1263,13 +1268,7 @@
 # Distributed Switch Architecture drivers
 #
 # CONFIG_NET_DSA_MV88E6XXX is not set
-# CONFIG_NET_DSA_MV88E6060 is not set
 # CONFIG_NET_DSA_MV88E6XXX_NEED_PPU is not set
-# CONFIG_NET_DSA_MV88E6131 is not set
-# CONFIG_NET_DSA_MV88E6123_61_65 is not set
-# CONFIG_NET_DSA_MV88E6171 is not set
-# CONFIG_NET_DSA_MV88E6352 is not set
-# CONFIG_NET_DSA_BCM_SF2 is not set
 CONFIG_ETHERNET=y
 # CONFIG_NET_VENDOR_3COM is not set
 # CONFIG_NET_VENDOR_ADAPTEC is not set
@@ -1278,9 +1277,10 @@
 # CONFIG_NET_VENDOR_ALTEON is not set
 # CONFIG_ALTERA_TSE is not set
 # CONFIG_NET_VENDOR_AMD is not set
-# CONFIG_NET_XGENE is not set
 CONFIG_NET_VENDOR_ARC=y
 # CONFIG_NET_VENDOR_ATHEROS is not set
+CONFIG_NET_CADENCE=y
+# CONFIG_MACB is not set
 # CONFIG_NET_VENDOR_BROADCOM is not set
 # CONFIG_NET_VENDOR_BROCADE is not set
 # CONFIG_NET_VENDOR_CHELSIO is not set
@@ -1488,7 +1488,6 @@
 #
 # Non-8250 serial port support
 #
-# CONFIG_SERIAL_MFD_HSU is not set
 CONFIG_SERIAL_CORE=y
 # CONFIG_SERIAL_JSM is not set
 # CONFIG_SERIAL_SCCNXP is not set
@@ -1713,6 +1712,7 @@
 # CONFIG_SENSORS_NCT6683 is not set
 # CONFIG_SENSORS_NCT6775 is not set
 # CONFIG_SENSORS_NCT7802 is not set
+# CONFIG_SENSORS_NCT7904 is not set
 # CONFIG_SENSORS_PCF8591 is not set
 # CONFIG_PMBUS is not set
 # CONFIG_SENSORS_SHT21 is not set
@@ -1816,10 +1816,12 @@
 CONFIG_MFD_88PM860X=y
 # CONFIG_MFD_MAX14577 is not set
 # CONFIG_MFD_MAX77693 is not set
+# CONFIG_MFD_MAX77843 is not set
 # CONFIG_MFD_MAX8907 is not set
 # CONFIG_MFD_MAX8925 is not set
 # CONFIG_MFD_MAX8997 is not set
 # CONFIG_MFD_MAX8998 is not set
+# CONFIG_MFD_MT6397 is not set
 # CONFIG_MFD_MENF21BMC is not set
 # CONFIG_MFD_VIPERBOARD is not set
 # CONFIG_MFD_RETU is not set
@@ -1833,6 +1835,7 @@
 # CONFIG_MFD_SEC_CORE is not set
 # CONFIG_MFD_SI476X_CORE is not set
 CONFIG_MFD_SM501=m
+# CONFIG_MFD_SKY81452 is not set
 # CONFIG_MFD_SMSC is not set
 # CONFIG_ABX500_CORE is not set
 # CONFIG_MFD_SYSCON is not set
@@ -1851,7 +1854,6 @@
 # CONFIG_TWL6040_CORE is not set
 # CONFIG_MFD_WL1273_CORE is not set
 # CONFIG_MFD_LM3533 is not set
-# CONFIG_MFD_TC3589X is not set
 # CONFIG_MFD_TMIO is not set
 # CONFIG_MFD_VX855 is not set
 # CONFIG_MFD_ARIZONA_I2C is not set
@@ -1959,6 +1961,7 @@
 # CONFIG_DRM_TDFX is not set
 # CONFIG_DRM_R128 is not set
 CONFIG_DRM_RADEON=y
+# CONFIG_DRM_RADEON_USERPTR is not set
 # CONFIG_DRM_RADEON_UMS is not set
 # CONFIG_DRM_NOUVEAU is not set
 # CONFIG_DRM_I915 is not set
@@ -1966,6 +1969,7 @@
 # CONFIG_DRM_SIS is not set
 # CONFIG_DRM_VIA is not set
 # CONFIG_DRM_SAVAGE is not set
+# CONFIG_DRM_VGEM is not set
 # CONFIG_DRM_VMWGFX is not set
 # CONFIG_DRM_GMA500 is not set
 # CONFIG_DRM_UDL is not set
@@ -2204,6 +2208,7 @@
 # CONFIG_SND_HDA_CODEC_SI3054 is not set
 CONFIG_SND_HDA_GENERIC=m
 CONFIG_SND_HDA_POWER_SAVE_DEFAULT=0
+CONFIG_SND_HDA_CORE=m
 # CONFIG_SND_USB is not set
 # CONFIG_SND_SOC is not set
 # CONFIG_SOUND_PRIME is not set
@@ -2238,7 +2243,6 @@
 # CONFIG_HID_ELO is not set
 # CONFIG_HID_EZKEY is not set
 # CONFIG_HID_HOLTEK is not set
-# CONFIG_HID_HUION is not set
 # CONFIG_HID_KEYTOUCH is not set
 CONFIG_HID_KYE=m
 # CONFIG_HID_UCLOGIC is not set
@@ -2416,6 +2420,7 @@
 # CONFIG_USB_EZUSB_FX2 is not set
 # CONFIG_USB_HSIC_USB3503 is not set
 # CONFIG_USB_LINK_LAYER_TEST is not set
+# CONFIG_USB_CHAOSKEY is not set
 
 #
 # USB Physical Layer drivers
@@ -2452,6 +2457,7 @@
 #
 # CONFIG_RTC_DRV_88PM860X is not set
 # CONFIG_RTC_DRV_ABB5ZES3 is not set
+# CONFIG_RTC_DRV_ABX80X is not set
 # CONFIG_RTC_DRV_DS1307 is not set
 # CONFIG_RTC_DRV_DS1374 is not set
 # CONFIG_RTC_DRV_DS1672 is not set
@@ -2514,11 +2520,10 @@
 #
 # DMA Devices
 #
-# CONFIG_INTEL_MID_DMAC is not set
 CONFIG_INTEL_IOATDMA=m
-# CONFIG_DW_DMAC_CORE is not set
 # CONFIG_DW_DMAC is not set
 # CONFIG_DW_DMAC_PCI is not set
+# CONFIG_HSU_DMA_PCI is not set
 CONFIG_DMA_ENGINE=y
 CONFIG_DMA_ACPI=y
 
@@ -2670,6 +2675,7 @@
 CONFIG_EXT4_FS=m
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
+# CONFIG_EXT4_ENCRYPTION is not set
 # CONFIG_EXT4_DEBUG is not set
 CONFIG_JBD=y
 CONFIG_JBD2=m
@@ -2696,6 +2702,7 @@
 # CONFIG_BTRFS_DEBUG is not set
 # CONFIG_BTRFS_ASSERT is not set
 # CONFIG_NILFS2_FS is not set
+# CONFIG_F2FS_FS is not set
 # CONFIG_FS_DAX is not set
 CONFIG_FS_POSIX_ACL=y
 CONFIG_EXPORTFS=y
@@ -2795,7 +2802,6 @@
 # CONFIG_PSTORE is not set
 # CONFIG_SYSV_FS is not set
 # CONFIG_UFS_FS is not set
-# CONFIG_F2FS_FS is not set
 CONFIG_NETWORK_FILESYSTEMS=y
 # CONFIG_NFS_FS is not set
 # CONFIG_NFSD is not set
@@ -2922,6 +2928,7 @@
 CONFIG_SCHED_DEBUG=y
 # CONFIG_SCHEDSTATS is not set
 # CONFIG_SCHED_STACK_END_CHECK is not set
+# CONFIG_DEBUG_TIMEKEEPING is not set
 # CONFIG_TIMER_STATS is not set
 
 #
@@ -2949,6 +2956,7 @@
 #
 # RCU Debugging
 #
+# CONFIG_PROVE_RCU is not set
 # CONFIG_SPARSE_RCU_POINTER is not set
 # CONFIG_TORTURE_TEST is not set
 # CONFIG_RCU_TORTURE_TEST is not set
@@ -2994,6 +3002,7 @@
 # CONFIG_TEST_BPF is not set
 # CONFIG_TEST_FIRMWARE is not set
 # CONFIG_TEST_UDELAY is not set
+CONFIG_MEMTEST=y
 # CONFIG_SAMPLES is not set
 CONFIG_HAVE_ARCH_KGDB=y
 # CONFIG_KGDB is not set
@@ -3203,6 +3212,7 @@
 CONFIG_RAID6_PQ=m
 CONFIG_BITREVERSE=y
 # CONFIG_HAVE_ARCH_BITREVERSE is not set
+CONFIG_RATIONAL=y
 CONFIG_GENERIC_STRNCPY_FROM_USER=y
 CONFIG_GENERIC_STRNLEN_USER=y
 CONFIG_GENERIC_NET_UTILS=y

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