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SubjectRe: [BUG] 4.17-rcX delays during boot and memory mapping errors
On Fri, May 18, 2018 at 07:32:59PM -0500, Bob Tracy wrote:
> Every one of the 4.17-rcX series has hung during boot at the point where
> "acpid" starts up. Beginning with -rc5, the boot actually proceeds to
> completion after an "uncomfortably" long delay.
>
> Attempting to run the X11 server results in the following diagnostic
> output in "/var/log/Xorg.0.log":

v4.17-rc6 took care of the X11 server startup issue. The
"uncomfortably" long delay issue persists. An observation as far as
differences between 4.16 and 4.17-rc6 during startup...

In v4.16 and earlier kernels, I wouldn't see the "random: crng init done"
message until moments after the system was done transitioning to multi-
user mode ("login" prompt on the console). In the v4.17-rcX series, I
don't see a login prompt until all the events represented in the "dmesg"
output below have occurred:

(...)
[ 7.314001] NET: Registered protocol family 10
[ 7.315781] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 7.317359] Segment Routing with IPv6
[ 8.667444] NET: Registered protocol family 17
[ 9.130872] e1000e: eth0 NIC Link is Up 10 Mbps Half Duplex, Flow
Control: None
[ 9.131839] e1000e 0000:00:19.0 eth0: 10/100 speed: disabling TSO
[ 9.136947] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 78.567150] random: crng init done
[ 102.974609] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 102.982063] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[ 102.983716] r8152 2-1.5:1.0 eth1: carrier on
(end of dmesg output)

As far as what I see on the console during bootup, I see the
"IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready" message, then
the system "hangs" until the "random: crng init done" message appears.
Then "acpid" startup and other events proceed normally.

Any idea what's going on here?

--Bob

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