Re: [gentoo-user] Problems booting vanilla kernel 4.1.x

[Peter Weilbacher <newsspam@Weilbacher.org>]

On Sat, 29 Aug 2015, Alexander Kapshuk wrote:

> You probably did look into this yourself, but did you double-check
> your /etc/lilo.conf? Is everything fine there?

At least it's identical between 4.0.5 and 4.1.6:

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

Don't ask me where all those options came from, they grew with time...

> Here are my RCU kernel config options. What do yours look like?
> % uname -r
> 4.1.6-vanilla
> % grep RCU .config
> # RCU Subsystem
> CONFIG_TREE_RCU=y
> CONFIG_SRCU=y
> # CONFIG_TASKS_RCU is not set
> CONFIG_RCU_STALL_COMMON=y
> CONFIG_RCU_FANOUT=32
> CONFIG_RCU_FANOUT_LEAF=16
> # CONFIG_RCU_FANOUT_EXACT is not set
> # CONFIG_RCU_FAST_NO_HZ is not set
> # 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
> # RCU Debugging
> # CONFIG_PROVE_RCU is not set
> # CONFIG_SPARSE_RCU_POINTER is not set
> # CONFIG_RCU_TORTURE_TEST is not set
> CONFIG_RCU_CPU_STALL_TIMEOUT=21
> # CONFIG_RCU_CPU_STALL_INFO is not set
> # CONFIG_RCU_TRACE is not set

Thanks. The only difference to my config there is that I have
CONFIG_RCU_FANOUT=64 and CONFIG_RCU_CPU_STALL_TIMEOUT=60 (don't ask me
where the values come from, I don't remember ever setting them different
from the default). But since that is all the same between 4.0.5 and
4.1.6, I don't think it has anything to do with my problem. Could the
RCU message just be telling me that since the machine doesn't properly
boot, it doesn't have anything to do?

Cheers,
   Peter.