Hazel Russman wrote:
On Fri, 5 Jan 2018 17:37:32 +0000 Ken Moffat <[email protected]>
wrote:
On Fri, Jan 05, 2018 at 04:30:15PM +0000, Hazel Russman wrote:
I have just built a 4.14.11 kernel with PTI and I can't boot it. I
get a string of acpi errors and then a panic. As far as I can see,
it's the same problem as
https://bugzilla.redhat.com/show_bug.cgi?id=1520265. That was cured
by a bios update but I wouldn't date to do a thing like that.
Looks like I am stuck with 4.12.8 for the time being. The processor
is pretty old, an Intel Core2 Duo. Maybe it's too old to be
affected by Meltdown. I would value any advice.
From what I was reading on lkml last night, all the issues reported
against 4.15-rc from fedora have now been fixed in Linus's tree, but
I do not know if those fixes have yet reached the stable 4.14 tree.
So my first suggestion is to try 4.14.12. Like you, I'm very wary of
bios updates (I've bricked enough hardware over the years).
4.14.12 has the same problem. However I was able to boot it
successfully by using the command line parameter "acpi=off". I have no
idea what not having acpi will do to my system!
I'm attaching the end of the earlier kernel panic messages
(painstakingly transcribed by hand) in case someone finds it
informative.
The odd thing is that a diff of the configuration files for 4.12.8 (the
native LFS-8.1 kernel) and 4.14.12 does not show anything new that's
relevant to acpi. There must be some difference in the code itself.
I just did a full build of the latest (updated today) build of LFS
(nothing from BLFS). I used a 4.14.12 kernel. When I build a new kernel,
I generally copy my most recent config to the linux tree as .config and
run 'make oldconfig'.
New menu items are presented. One thing I noted was a new option:
PAGE_TABLE_ISOLATION
I selected yes for that. The system came up with no problem. Comparing
dmesg on the same system with a 4.13.11 kernel, the newer system added
swap at 9.753897 and the older one at 8.819398 so it seems it took about a
second longer to finish booting. The boot scripts were about a second
slower also.
I did not need the acpi=off kernel option.
-- Bruce
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