doughgle

using doughgle/docs-as-code:main

$ docker run -it ghcr.io/doughgle/docs-as-code:main bash

Example markdown

hugo:/src$ cat test.md 

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[
  {
    "name": "EKS",
    "ring": "adopt",
    "quadrant": "platform services",
    "isNew": "FALSE",
    "description": "Elastic Kubernetes Service"
  },
  {
    "name": "EC2",

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git send-email

Git send-email is used by the Linux dev community to send patches as opposed to pull requests. Follow the excellent tutorial on https://git-send-email.io/.

If its a case of TL;DR, in the working git repository:

$ git send-email --annotate -v3 HEAD^

This article captures a few problems I encountered and how I resolved them.

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Decode a Linux Kernel Call Trace (kernel panic or kernel oops)

Kernel Call Trace

A Linux kernel call trace, like any traceback, call stack, stacktrace or backtrace, lists a most-recent-first chain of function calls which led to a crash. For the linux kernel, a crash is a panic or oops.

Without debug symbols, a kernel stack trace may come only with a line-by-line list of function symbols, e.g.

[ 844.569701][ T7073] Call Trace:

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Helm Cheat Sheet

For Helm 3.

Concepts

Helm is a Package Manager for Kubernetes.

Just like:

YUM is a Package Manager for Fedora and Redhat Linux.

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	.file	"example.c"						# filename
	.text												# store in text section
	.globl	myfunc							# exported symbol
	.type	myfunc, @function			#
myfunc:												# function name
.LFB0:
	.cfi_startproc							#### PROLOGUE
	pushq	%rbp									# push base pointer (64bit) onto the stack
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16

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#include <stdint.h>
#include <stdio.h>

long int globl_cnt = 3;

void myfunc() {
  int32_t a; // variable initialized with the value of %edi register
  int64_t b = 0;
  int32_t c = 0;

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diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 1ca0130..8d4e1fc 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -927,8 +927,11 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
 {
        unsigned long nr_switches;
 
-       SEQ_printf(m, "%s (%d, #threads: %d)\n", p->comm, task_pid_nr_ns(p, ns),
-                                               get_nr_threads(p));

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commit acc0182c3d3869802bc20c8bf4e04c3464936bcc
Author: Douglas Hellinger <[email protected]>
Date:   Sun Nov 19 22:48:46 2017 +0800

    Fix tracerPid=0 in /proc

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 6f6fc16..bcf470d 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c