Re: [lfs-support] Booting LFS with systemd
On 07/06/2018 01:20 AM, Frans de Boer wrote: On 07/05/2018 11:56 PM, Bruce Dubbs wrote: On 07/05/2018 02:48 PM, Frans de Boer wrote: On 06/30/2018 01:29 PM, Hazel Russman wrote: On Fri, 29 Jun 2018 01:25:29 -0400 Michael Shell wrote: On Thu, 28 Jun 2018 16:06:00 +0800 Xi Ruoyao wrote: Now I only use "initrd" directive to update CPU microcode and fix the buggy ACPI DSDT of my laptop (another sad story). . And as there now seems to be several people who suffer with the ACPI DSDT driver bug, you guys should make sure upstream is aware of the problem, if they aren't already. ... Cheers, Mike -- I did a git bisect on my system, but I couldn't make much sense of the result. The commit it finally settled on didn't seem to have anything to with acpi. [quote] Bisecting: 2 revisions left to test after this (roughly 1 step) [9af9b94068fb1ea3206a700fc222075966fbef14] x86/cpu/AMD: Handle SME reduction in physical address size Bisecting: 0 revisions left to test after this (roughly 1 step) [33c2b803edd13487518a2c7d5002d84d7e9c878f] x86/mm: Remove phys_to_virt() usage in ioremap() Bisecting: 0 revisions left to test after this (roughly 0 steps) [7744ccdbc16f0ac4adae21b3678af93775b3a386] x86/mm: Add Secure Memory Encryption (SME) support [unquote] I sent the result to the kernel acpi development list but never got an answer. If someone else on this list wants to try, I can send him my complete bisect logs. -- Hazel This quite frustrating. After recompiling, following the book to the letter, I still get a frozen LFS system. One thing I do note however is that the freezing always occurs after systemd has detected that it is on a virtual machine. A number of error messages is send, but due to ratelimiting I can't see them because they are suppressed. I had even rebuild everything with systemd-232, and that worked as before. But after 232, things started to behave strange. Now way to debug systemd, whatever I do Help? I don't mean to be pedantic, but I really don't think you would run into these types of problems using System V. Why not try that? -- Bruce Hi Bruce, With System V there is - of course - no problem. The thing is that systemd - if it runs well - is somewhat easier to use because of the use of .service files. I'll have to disagree that service files are easier. What I do agree with is that they are more consistent among distros. The boot scripts for System V are really quite easy to read and, if needed, write. I also noticed that some packages are only shipping .service(.in) files and have abandon the use of sysVinit files. Then they are abandoning those distros that do not use systemd such as the BSDs and Devuan. But those distros can easily add their own boot scripts. I'll note that all the BLFS packages that need boot scripts have them, Combined with the fact that most distributions have embraced systemd as their primary or only init system let me believe that we are stuck with this piece of ever growing mutation. And as LFS is a teaching ground, it should - however reluctant - incorporated this too. As a teaching tool, NOT using systemd is essential. There is far too much done by systemd in an opaque manner that System V demonstrates and, if desired,implemented in custom ways. Also, the goal is that someone fire-up their basic hardware with a LFS born OS, but for testing or use in VM's development is nowadays mostly within the VM realm. When I teach LFS in class, I always have the students use real HW, There are too many things that VMs hide, -- Bruce -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
Re: [lfs-support] Booting LFS with systemd
On 07/06/2018 02:46 AM, Xi Ruoyao wrote: On 2018-07-05 17:05 -0400, Baho Utot wrote: On 07/05/2018 03:48 PM, Frans de Boer wrote: On 06/30/2018 01:29 PM, Hazel Russman wrote: On Fri, 29 Jun 2018 01:25:29 -0400 Michael Shell wrote: On Thu, 28 Jun 2018 16:06:00 +0800 Xi Ruoyao wrote: Now I only use "initrd" directive to update CPU microcode and fix the buggy ACPI DSDT of my laptop (another sad story). . And as there now seems to be several people who suffer with the ACPI DSDT driver bug, you guys should make sure upstream is aware of the problem, if they aren't already. I don't know if it is a driver bug. It seems to me a bug in DSDT itself. I moved to FreebSD, but I am moving back to linux because of all the non sense going on with FreeBSD. I'll be using the "old and proven" init system. Just curious, is there anything like "BSD From Scratch"? Yes, but it doesn't work either -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
Re: [lfs-support] Booting LFS with systemd
On Fri, 06 Jul 2018 15:44:19 +0800 Xi Ruoyao wrote: > There is message from systemd crash handler (showing a SIGABRT and dumping > core), but there is no welcome message. So the problem should be in > mount_cgroup_controllers. > > There IS a way to debug systemd - adding log_info into systemd source code > to output key variables and debug messages. I was one of the ACM/ICPC > contestants who are very familiar with this ``debugging technique". This > technique often outperforms GDB in programming contests. :) Xi, That is really good stuff to know! However, I don't understand what you mean by "adding log_info into systemd source code". How exactly do you do that? e.g., a debug option the source configure script, a manual alteration of source code (and how/where), etc. If it is a cgroup issue, it is required that the kernel be built with: CONFIG_CGROUPS (it is OK to disable all controllers) Mike -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
Re: [lfs-support] Booting LFS with systemd
On 2018-07-06 08:23 +0200, Frans de Boer wrote:
> On 07/06/2018 05:32 AM, Michael Shell wrote:
> > On Thu, 5 Jul 2018 21:48:16 +0200
> > Frans de Boer wrote:
> >
> > > I had even rebuild everything with systemd-232, and that worked as
> > > before. But after 232, things started to behave strange. Now way to
> > > debug systemd, whatever I do
> >
> > Frans,
I read some systemd-238 code (src/core/main.c:1820):
> if (arg_system) {
> /* Make sure we leave a core dump without panicing the
> kernel. */
> install_crash_handler();
>
> if (!skip_setup) {
> r = mount_cgroup_controllers(arg_join_controllers);
> if (r < 0) {
> *ret_error_message = "Failed to mount cgroup
> hierarchies";
> return r;
> }
>
> status_welcome();
There is message from systemd crash handler (showing a SIGABRT and dumping
core), but there is no welcome message. So the problem should be in
mount_cgroup_controllers.
There IS a way to debug systemd - adding log_info into systemd source code
to output key variables and debug messages. I was one of the ACM/ICPC
contestants who are very familiar with this ``debugging technique". This
technique often outperforms GDB in programming contests. :)
--
Xi Ruoyao
School of Aerospace Science and Technology, Xidian University
--
http://lists.linuxfromscratch.org/listinfo/lfs-support
FAQ: http://www.linuxfromscratch.org/blfs/faq.html
Unsubscribe: See the above information page
Do not top post on this list.
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
http://en.wikipedia.org/wiki/Posting_style
Re: [lfs-support] Booting LFS with systemd
On 2018-07-05 17:05 -0400, Baho Utot wrote: > On 07/05/2018 03:48 PM, Frans de Boer wrote: > > On 06/30/2018 01:29 PM, Hazel Russman wrote: > > > On Fri, 29 Jun 2018 01:25:29 -0400 > > > Michael Shell wrote: > > > > > > > On Thu, 28 Jun 2018 16:06:00 +0800 > > > > Xi Ruoyao wrote: > > > > > > > > > Now I only use "initrd" directive to update CPU microcode and fix the > > > > > buggy ACPI DSDT of my laptop (another sad story). > > > > > > > > . > > > > > > > > And as there now seems to be several people who suffer with the > > > > ACPI DSDT driver bug, you guys should make sure upstream is aware > > > > of the problem, if they aren't already. I don't know if it is a driver bug. It seems to me a bug in DSDT itself. > I moved to FreebSD, but I am moving back to linux because of all the > non sense going on with FreeBSD. I'll be using the "old and proven" > init system. Just curious, is there anything like "BSD From Scratch"? -- Xi Ruoyao School of Aerospace Science and Technology, Xidian University -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
Re: [lfs-support] Booting LFS with systemd
On 07/06/2018 05:32 AM, Michael Shell wrote: On Thu, 5 Jul 2018 21:48:16 +0200 Frans de Boer wrote: I had even rebuild everything with systemd-232, and that worked as before. But after 232, things started to behave strange. Now way to debug systemd, whatever I do Frans, That's the whole point of being able to start the system with a shell - so that systemd's startup, or failure thereof, can then be debugged manually. What happened when you booted to shell and then tried to start systemd manually? init=/bin/bash mount -o remount,rw / Then, at the bash prompt, you want to try to start systemd manually. You'll also want to first make sure you get a core file if/when it crashes: echo "core" > /proc/sys/kernel/core_pattern ulimit -c unlimited /usr/lib/systemd/systemd With the above, does systemd crash and yield a core file? Does dmesg show any relevant error messages? If you get a core file, you can run gdb on systemd using the core file: gdb -c core /usr/lib/systemd/systemd then what does the gdb backtrace reveal: (gdb) bt You can also try gdb on systemd without the core: gdb /usr/lib/systemd/systemd (gdb) run (gdb) bt If I had to bet at this point, my money would go on the theory that your kernel is lacking support for something systemd (now) needs. You can find a current list of systemd kernel config requirements here: https://cgit.freedesktop.org/systemd/systemd/tree/README Note also, some kernel features must be *disabled*, e.g., CONFIG_SYSFS_DEPRECATED=n Also, "systemd requires that the /run mount point exists. systemd also requires that /var/run is a symlink to /run " Cheers, Mike Hi Mike, I will follow your suggestions, of which few are new to me, and will come back with a report. --- Frans -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
Re: [lfs-support] Booting LFS with systemd
On 07/05/2018 11:56 PM, Bruce Dubbs wrote: On 07/05/2018 02:48 PM, Frans de Boer wrote: On 06/30/2018 01:29 PM, Hazel Russman wrote: On Fri, 29 Jun 2018 01:25:29 -0400 Michael Shell wrote: On Thu, 28 Jun 2018 16:06:00 +0800 Xi Ruoyao wrote: Now I only use "initrd" directive to update CPU microcode and fix the buggy ACPI DSDT of my laptop (another sad story). . And as there now seems to be several people who suffer with the ACPI DSDT driver bug, you guys should make sure upstream is aware of the problem, if they aren't already. ... Cheers, Mike -- I did a git bisect on my system, but I couldn't make much sense of the result. The commit it finally settled on didn't seem to have anything to with acpi. [quote] Bisecting: 2 revisions left to test after this (roughly 1 step) [9af9b94068fb1ea3206a700fc222075966fbef14] x86/cpu/AMD: Handle SME reduction in physical address size Bisecting: 0 revisions left to test after this (roughly 1 step) [33c2b803edd13487518a2c7d5002d84d7e9c878f] x86/mm: Remove phys_to_virt() usage in ioremap() Bisecting: 0 revisions left to test after this (roughly 0 steps) [7744ccdbc16f0ac4adae21b3678af93775b3a386] x86/mm: Add Secure Memory Encryption (SME) support [unquote] I sent the result to the kernel acpi development list but never got an answer. If someone else on this list wants to try, I can send him my complete bisect logs. -- Hazel This quite frustrating. After recompiling, following the book to the letter, I still get a frozen LFS system. One thing I do note however is that the freezing always occurs after systemd has detected that it is on a virtual machine. A number of error messages is send, but due to ratelimiting I can't see them because they are suppressed. I had even rebuild everything with systemd-232, and that worked as before. But after 232, things started to behave strange. Now way to debug systemd, whatever I do Help? I don't mean to be pedantic, but I really don't think you would run into these types of problems using System V. Why not try that? -- Bruce Hi Bruce, With System V there is - of course - no problem. The thing is that systemd - if it runs well - is somewhat easier to use because of the use of .service files. I also noticed that some packages are only shipping .service(.in) files and have abandon the use of sysVinit files. Combined with the fact that most distributions have embraced systemd as their primary or only init system let me believe that we are stuck with this piece of ever growing mutation. And as LFS is a teaching ground, it should - however reluctant - incorporated this too. Also, the goal is that someone fire-up their basic hardware with a LFS born OS, but for testing or use in VM's development is nowadays mostly within the VM realm. Regards, Frans -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
