If you tried every way on output to Linux kernel, but nothing work. Probably that’s because SPCR(Serial Port Console Redirection Table), and this option default is enable.
Just disable it in your BIOS and add “console=tty0” to /etc/default/grub, then update grub.cfg. it will work.
In AMI BIOS, it should be in the Advanced->Serial Port Console Redirection->Console Redirection
Set it to [Disabled]
ref.
[RFC PATCH v2 0/3] Prefer working VT console over SPCR and device-tree chosen stdout-path
Before setting up Ubuntu/Fedora PXE boot, it needs to prepare several items on your PXE server:
Due to CentOS website document cannot provide a simple instruction to build CentOS 8 stream with some easy steps. So, I make a note to record these procedures about how to build it.
Detail description and instruction, please refer to CentOS document, but if you have read the document and still don’t know how to do that, it can follow my instruction to build the kernel from CentOS 8 kernel source.
看到有人說改 MTU 可以解決 FF14 FFXIV 的延遲問題，【心得】中華電信FF14晚間卡頓解決方式
這個之前有看到過，但是忘了下去試
猜測原理應該藉由中華電信內部設定會讓小封包先通行的設定，達到穩定 ping 值的目地
Read more »muttichase is a google open source tool which can run latency, bandwidth and loader-latency tool,
it can support both x86 and ARM64 platforms.
but it will have compile error on CentOS 8
root cause is this package needs static lib support, but regular CentOS doesn’t have it.
# make cc -g -O3 -static -pthread multichase.o permutation.o arena.o util.o -lrt -lm -o multichase /usr/bin/ld: cannot find -lrt /usr/bin/ld: cannot find -lm /usr/bin/ld: cannot find -lpthread /usr/bin/ld: cannot find -lc collect2: error: ld returned 1 exit status make: *** [<builtin>: multichase] Error 1Read more »
這個時間有點久了，我也忘了很多細節，畢竟用到的次數太少，不過就將記得的寫一篇，以後可以自己回來查資料
如果是有 BMC 的機器，BMC 內部有一個 watchdog 可以監視 host 系統運行的狀況，這個拿來放在遠端重啟 host 非常好用
Environment is CentOS 8, broadcom 100G NetXtreme-E series driver .
Host : Ampere Altra Platform
if rebuild the CentOS kernel and there was previous Broadcom nic driver alredy installed, it will trigger dkms to rebuild the driver on current kernel.
make install error as following
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