On 19-07-18 14:57, Hazel Russman wrote:
On Thu, 19 Jul 2018 13:54:19 +0200
Frans de Boer <[email protected]> wrote:
However a git bisection showed that this is actually a memory management issue.
The kernel commit that caused the problem is :
[33c2b803edd13487518a2c7d5002d84d7e9c878f] x86/mm: Remove
phys_to_virt() usage in ioremap().
Reintroducing the code:
"if (is_ISA_range(phys_addr, last_addr))
return (__force void __iomem *)phys_to_virt(phys_addr);"
makes the system bootable again. I have also tested this on a 4.15 kernel and
it works there too.
Hello Hazel,
What you inserted is already available as from the 4.13.0 release. But I
can't compile 4.13. anymore because I now have gcc 8.1 instead of the
former 7 series.
I continue my search and go for 4.14 where the check is removed. But i
guess that will fail too and this is no solution to my problem with
systemd freezing just after it found out that it is on a VM.
--- Frans
--
Yes, I can boot 4.13 kernels without any problems. But I wanted an LTS kernel
that can keep up with the newest exploits (especially meltdown) and the next
LTS after 4.9 is 4.14. I'm using bare iron, not a VM (and no systemd!), but
it's rather old hardware. The processor is an Intel Core Duo. I can send you
the cpuinfo if you want it.
I suspect that if you did build 4.14, it would behave properly; after all, it
does for most people. I have 4.15 on my laptop (which has a Via Nano processor)
and no problems there. But I'd be happy to carry out any exploratory tests you
like on my desktop, since that's the machine that misbehaves.
Hello Hazel,
I get the impression you have been send to me with the wrong
info/background. I have no problem running things on bare metal, but it
is the problem with LFS and having systemd on a VM. As explained in the
thread 'Booting LFS with Systemd'.
I know that Bruce uses bare metal too, but why not using VM's when one
can continue developing without having to reboot into an incomplete
system environment. Also, if one has multiple systems to spare, bare
metal can be a way. If not, VM's are a welcome solution.
So, I think that I am chasing the wrong ghost and have a talk with the
systemd developers instead. Despite the lack of interest for using VM's,
I shall share any positive result with the LFS list.
Discussing closed.
Regards Frans.
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