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hiboma

sun 元気〜？

hiboma

Introdcution

fsnotify: Fix fsnotify_mark_connector race

Description

CentOS7.5 + nginx + td-agent + in_tail plugin is able to reproduce this bug

Steps to repdocution

hiboma

突然のホストダウンで /proc/meminfo の Dirty ページがディスクに同期されず揮発するかどうかの検証

Dirty ページの書き出しを抑えるめちゃくちゃ設定をする

sudo sysctl -w vm.dirty_writeback_centisecs=1000000 # 単位は ms
sudo sysctl -w    vm.dirty_expire_centisecs=1000000 # 単位は ms
sudo sysctl -w    vm.dirty_background_ratio=99
sudo sysctl -w               vm.dirty_ratio=99
```

hiboma

/**
 * kthread_stop - stop a thread created by kthread_create().
 * @k: thread created by kthread_create().
 *
 * Sets kthread_should_stop() for @k to return true, wakes it, and
 * waits for it to exit. This can also be called after kthread_create()
 * instead of calling wake_up_process(): the thread will exit without
 * calling threadfn().
 *
 * If threadfn() may call do_exit() itself, the caller must ensure

hiboma

#!/usr/bin/perl

use strict;
use warnings;
use IO::Socket;

my %to_be_aggregated = (
    'unicorn'               => 'unicorn_worker',
    'perl-fcgi'             => 'perl-fcgi',
    'mogilefsd'             => 'mogilefsd',

hiboma

#!/usr/bin/perl

use strict;
use warnings;

::main(@ARGV);

sub print_config {

    printf <<"....";

hiboma

--- /tmp/1.txt	2015-08-28 19:10:53.000000000 +0900
+++ /tmp/2.txt	2015-08-28 19:11:05.000000000 +0900
@@ -1,9 +1,5 @@
 aa/01.jpg
 aa/02.jpg
 aa/03.jpg
-aa/bb/01.jpg
-aa/bb/02.jpg  
-aa/bb/03.jpg
-aa/cc/01.jpg

hiboma

--- /tmp/1.txt	2015-08-28 19:10:53.000000000 +0900
+++ /tmp/2.txt	2015-08-28 19:11:05.000000000 +0900
@@ -1,9 +1,5 @@
 aa/01.jpg
 aa/02.jpg
 aa/03.jpg
-aa/bb/01.jpg
-aa/bb/02.jpg  
-aa/bb/03.jpg
-aa/cc/01.jpg

hiboma

#!/usr/bin/env ruby

require 'ox'
require 'benchmark'
require 'builder'

NO_SUCH_KEY_CODE    = 'NoSuchKey'.freeze
NO_SUCH_KEY_MESSAGE = 'The specified key does not exist.'.freeze

@code    = NO_SUCH_KEY_CODE