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Hiroya Ito hiboma

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hiboma / gist:3d13bcd16a7d758e680e2515b972daf8
Created June 24, 2021 10:39
current->personality
personality 19 arch/alpha/include/asm/processor.h (current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL)
personality 27 arch/alpha/include/asm/processor.h ((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2)
personality 1306 arch/alpha/kernel/osf_sys.c if (current->personality & ADDR_LIMIT_32BIT)
personality 1368 arch/alpha/kernel/osf_sys.c if (unlikely(personality(current->personality) == PER_OSF4))
personality 1380 arch/alpha/kernel/osf_sys.c if (unlikely(personality(current->personality) == PER_OSF4))
personality 165 arch/arm/include/asm/page.h (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
personality 19 arch/arm/include/asm/processor.h #define STACK_TOP ((current->personality & ADDR_LIMIT_32BIT) ? \
personality 62 arch/arm/include/asm/processor.h current->personality & FDPIC_FUNCPTRS) { \
personality 69 arch/arm/include/asm/processor.h if (current->personality & ADDR_LIMIT_32BIT)
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hiboma / gist:9a6bd9373f100d94df1f76977e2619d9
Last active December 9, 2019 04:32
sun 元気〜？
@hiboma
hiboma / sun.md
Last active December 9, 2019 04:28

@hiboma
hiboma / fsnotify-race.md
Last active September 4, 2019 08:23
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hiboma / nginx.conf
Created January 24, 2012 13:02
Nginx+Lua+Redis で動的upstream
worker_processes 1;
error_log /dev/stderr debug;
events {
worker_connections 256;
}
http {
server {
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hiboma / SOL_SOCKET-SO_PEERCRED.rb
Created February 29, 2012 14:20
SOL_SOCKET, SO_PEERCRED in ruby
#!/usr/bin/env ruby
require 'socket'
include Socket::Constants
UNIXServer.open("\0(abstract socket)") {|server|
clinet = UNIXSocket.new("\0(abstract socket)")
clinet.setsockopt(SOL_SOCKET, SO_PASSCRED, 1)
sock = server.accept
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hiboma / proc-meminfo-dirty.md
Created February 3, 2016 09:41

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
```
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hiboma / gist:7251089
Last active December 27, 2015 02:19
array_push と [] との比較

array_push と $array[] = $val って何が違うの

  • array_push で配列の要素足すのと、$array[] = $val で配列の要素足すのと何が違うのかわからんので調べた
  • http://pecl.php.net/package/vld を入れると処理系の OPコードを見れる

環境

[vagrant@localhost ~]$ rpm -q php
php-5.3.3-23.el6_4.x86_64
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hiboma / slide.md
Created October 2, 2013 09:07
http://glide.so/hiboma/6791026

Untitled Slide

Welcome to Glide.

Glide is the easiest way to create useful slide for all of your Gists.

  • input key <- to go backward.
  • input key -> to go forward.

Publishing

@hiboma
hiboma / gist:5857146
Last active December 18, 2015 22:49
running Docker on SL6

Docket SL6 で動かすに当たっていろいろ自分で用意しないといけません

  • aufs 付きカーネル
  • iptables の addrtype
  • go
  • lxc
  • cgroup
  • docker

苦労するだけであまり価値が無い