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finalturismo
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Joined: 06 Jan 2020
Posts: 410
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 Posted: Fri Jan 28, 2022 11:36 pm Post subject: Out Of Memory During boot, But I Have 256GB Of Memory..... |
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So as the title stays, i compiled a pretty large kernel with lots of added drives. Problem is when i try to post it say that it is out of memory and goes back to the grub menu.
Tried with both initramfs and without. Not using kernel modules....
Not sure why this is happening i have 256GB of ram so i know its not that. I think there is a timeout iam hitting our a memory limit for the kernel to use during boot.
Does anyone know how to fix this?
Not finding anything clear on Google. So as usually, i figured id ask the smartest Linux community out there. |
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alamahant
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Joined: 23 Mar 2019
Posts: 3949
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| Posted: Sat Jan 29, 2022 12:12 am Post subject: |
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What happens if you use kernel parameter
mem=16G
during boot?
for example.
Of course you can try with other values also.
There is talk that a bios update might help.
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finalturismo
Guru
Joined: 06 Jan 2020
Posts: 410
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| Posted: Sat Jan 29, 2022 12:36 am Post subject: |
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| alamahant wrote: | What happens if you use kernel parameter
mem=16G
during boot?
for example.
Of course you can try with other values also.
There is talk that a bios update might help. |
'
I saw that somewhere else and i tried it.
Once i rebooted my total memory available was only 16GB instead of 256GB -.- |
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Hu
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Joined: 06 Mar 2007
Posts: 23089
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| Posted: Sat Jan 29, 2022 1:47 am Post subject: |
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| What exactly is the error message displayed? |
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finalturismo
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Joined: 06 Jan 2020
Posts: 410
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| Posted: Sat Jan 29, 2022 2:53 am Post subject: |
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| Hu wrote: | | What exactly is the error message displayed? |
"Out of memory" about 20 seconds after it says loading kernel...... on boot screen 
Is it possible its bypassing cgroups default limits or something?
What log should i check for more information? |
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figueroa
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Joined: 14 Aug 2005
Posts: 3007
Location: Edge of marsh USA
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| Posted: Sat Jan 29, 2022 4:54 am Post subject: |
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How big is big? How about booting to your previous kernel? Still work? If yes, consider the differences, and work in smaller steps to troubleshoot where it went wrong.
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Andy Figueroa
hp pavilion hpe h8-1260t/2AB5; spinning rust x3
i7-2600 @ 3.40GHz; 16 gb; Radeon HD 7570
amd64/23.0/split-usr/desktop (stable), OpenRC, -systemd -pulseaudio -uefi |
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Goverp
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Joined: 07 Mar 2007
Posts: 2202
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| Posted: Sat Jan 29, 2022 10:35 am Post subject: |
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Unlikely, but have you dropped 64-bit support in your kernel by mistake?
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finalturismo
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| Posted: Sat Jan 29, 2022 3:51 pm Post subject: |
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| Goverp wrote: | | Unlikely, but have you dropped 64-bit support in your kernel by mistake? |
Checking now, that would be funny. Kinda hoping i did. |
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finalturismo
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Joined: 06 Jan 2020
Posts: 410
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| Posted: Sat Jan 29, 2022 6:17 pm Post subject: |
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Nope, not that
Anyway i can do a tracer or is there a specific kernel dump log i can check? |
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Anon-E-moose
Watchman
Joined: 23 May 2008
Posts: 6221
Location: Dallas area
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| Posted: Sat Jan 29, 2022 7:50 pm Post subject: |
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Are you sure the bios is passing the right amount of memory to the kernel.
What does post show for memory (it will be when machine is powered up) or if that is turned off, boot into bios, does it show the correct memory?
Have you tried passing mem=256G to the kernel?
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UM780, 6.12 zen kernel, gcc 13, openrc, wayland |
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pingtoo
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Joined: 10 Sep 2021
Posts: 1485
Location: Richmond Hill, Canada
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| Posted: Sat Jan 29, 2022 7:55 pm Post subject: |
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I found this article Kernel Size Tuning Guide online. I know this article is out dated and does not match your case. I just hope this may give direction for how to exam the kernel.
I wonder if you can boot into a normal functional system and use a VM to boot the new problematic kernel to see if there is something in VM logs can give some clue where is problem. |
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finalturismo
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Joined: 06 Jan 2020
Posts: 410
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| Posted: Tue Feb 01, 2022 6:18 am Post subject: |
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| pingtoo wrote: | I found this article Kernel Size Tuning Guide online. I know this article is out dated and does not match your case. I just hope this may give direction for how to exam the kernel.
I wonder if you can boot into a normal functional system and use a VM to boot the new problematic kernel to see if there is something in VM logs can give some clue where is problem. |
Thanks for the link, i think i found the issue. I removed all the driver entries that said experimental next to them and it posted. I have at least 80% of the drivers built into kernel hah!.
I think 1 of them was causing a memory leak. Custom xanmod rt kernel working great for my project. |
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