[cfarm-users] Does cfarm421 need more RAM?

[Jing Luo]

Hi,

I'm the maintainer of cfarm{420,421,422} and I noticed that cfarm421 
spits out these in the kernel log message buffer:

================8<=============8<===============
[407044.868840] __vm_enough_memory: pid: 1547477, comm: qemu-aarch64, 
not enough memory for the allocation
[407044.873072] __vm_enough_memory: pid: 1547477, comm: qemu-aarch64, 
not enough memory for the allocation
[407793.227963] __vm_enough_memory: pid: 1629843, comm: qemu-loongarch6, 
not enough memory for the allocation
[407793.252490] __vm_enough_memory: pid: 1629843, comm: qemu-loongarch6, 
not enough memory for the allocation
[408951.450373] __vm_enough_memory: pid: 1782006, comm: qemu-ppc64, not 
enough memory for the allocation
[408951.455591] __vm_enough_memory: pid: 1782006, comm: qemu-ppc64, not 
enough memory for the allocation
[409186.357363] __vm_enough_memory: pid: 1813298, comm: qemu-ppc64le, 
not enough memory for the allocation
[409186.361280] __vm_enough_memory: pid: 1813298, comm: qemu-ppc64le, 
not enough memory for the allocation
[409864.075096] __vm_enough_memory: pid: 1873876, comm: qemu-riscv64, 
not enough memory for the allocation
[409864.084699] __vm_enough_memory: pid: 1873876, comm: qemu-riscv64, 
not enough memory for the allocation
[410768.150482] __vm_enough_memory: pid: 1934927, comm: qemu-sparc64, 
not enough memory for the allocation
[410768.156067] __vm_enough_memory: pid: 1934927, comm: qemu-sparc64, 
not enough memory for the allocation
[411410.679436] __vm_enough_memory: pid: 1964674, comm: qemu-x86_64, not 
enough memory for the allocation
[411410.684506] __vm_enough_memory: pid: 1964674, comm: qemu-x86_64, not 
enough memory for the allocation
[430615.068394] __vm_enough_memory: pid: 2110282, comm: qemu-aarch64, 
not enough memory for the allocation
[430615.083721] __vm_enough_memory: pid: 2110282, comm: qemu-aarch64, 
not enough memory for the allocation
[433503.627242] __vm_enough_memory: pid: 2347231, comm: qemu-ppc64, not 
enough memory for the allocation
[433503.631411] __vm_enough_memory: pid: 2347231, comm: qemu-ppc64, not 
enough memory for the allocation
[433935.278186] __vm_enough_memory: pid: 2383232, comm: qemu-ppc64le, 
not enough memory for the allocation
[433935.283613] __vm_enough_memory: pid: 2383232, comm: qemu-ppc64le, 
not enough memory for the allocation
[435267.994912] __vm_enough_memory: pid: 2456518, comm: qemu-sparc64, 
not enough memory for the allocation
[435268.002203] __vm_enough_memory: pid: 2456518, comm: qemu-sparc64, 
not enough memory for the allocation
[436006.040243] __vm_enough_memory: pid: 2491131, comm: qemu-x86_64, not 
enough memory for the allocation
[436006.061130] __vm_enough_memory: pid: 2491131, comm: qemu-x86_64, not 
enough memory for the allocation
[449685.944334] __vm_enough_memory: pid: 3055522, comm: tw2494, not 
enough memory for the allocation
[449685.948704] __vm_enough_memory: pid: 3055522, comm: tw2494, not 
enough memory for the allocation
[450558.392384] __vm_enough_memory: pid: 3091900, comm: tw2494, not 
enough memory for the allocation
[450558.396205] __vm_enough_memory: pid: 3091900, comm: tw2494, not 
enough memory for the allocation
================8<=============8<===============
root at cfarm421:~# free -h
                total        used        free      shared  buff/cache   
available
Mem:            64Gi       4.5Gi        20Gi       1.6Mi        40Gi     
    60Gi
Swap:             0B          0B          0B
================8<=============8<===============

There is no log about OOM killer. Does cfarm421 need more RAM? Doesn't 
look like it though, the messages troubled me. I may be able to add 
another 64GB to cfarm421 (via qemu VM guest RAM hotplug), hopefully 
without the host crashes and burns.

PS: if anyone needs a dump of dmesg on cfarm420~422, PM me anytime. I 
see lines like "dosbox-x[pid]: memfd_create() called without MFD_EXEC or 
MFD_NOEXEC_SEAL set" or "segfault at ... likely on CPU ... (core ..., 
socket ...)"



-- 
Jing Luo
About me: https://jing.rocks/about/
PGP Fingerprint: 4E09 8D19 00AA 3F72 1899 2614 09B3 316E 13A1 1EFC
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