jiewei-ke

# ext4 deadlock issue

## 0. Background

This gist repo is about an ext4 deadlock issue which may be happened when OOM
killer is triggered on CentOS 7 with version after 3.10.0-862.el7.

See https://bugzilla.redhat.com/show_bug.cgi?id=1911392 for more details.

## 1. How to reproduce this issue?

nchaigne

Building GCC 7.3.0 on Red Hat Enterprise Linux 7

Introduction

Red Hat Enterprise Linux (RHEL) distribution ships with a somewhat outdated version of the GCC compiler (4.8.3 on RHEL 7.1), which may not be suitable to your compilation requirements. For example, C11 - which supersedes C99 - is fully supported only starting from GCC 4.9).

Additionally, recent versions of GCC (GCC6, GCC7) come with improvements which help detect issues at build time and offer suggestions on how to fix them. Sometimes, these are even actually helpful!

This note describes how to build the latest GCC (7.3 as of January 2018) from sources on RHEL 7. This should be applicable as is on CentOS 7. For other Linux distributions, adapt as needed.

shawnrice

#!/bin/sh

# This is a skeleton of a bash daemon. To use for yourself, just set the
# daemonName variable and then enter in the commands to run in the doCommands
# function. Modify the variables just below to fit your preference.

daemonName="DAEMON-NAME"

pidDir="."
pidFile="$pidDir/$daemonName.pid"