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Red Hat Enterprise Linux 7 7.1 Release Notes
Red Hat Enterprise Linux 7 7.1 Release Notes Release Notes for Red Hat Enterprise Linux 7 Red Hat Customer Content Services Red Hat Enterprise Linux 7 7.1 Release Notes Release Notes for Red Hat Enterprise Linux 7 Red Hat Customer Content Services Legal Notice Copyright © 2015 Red Hat, Inc. This document is licensed by Red Hat under the Creative Commons Attribution-ShareAlike 3.0 Unported License. If you distribute this document, or a modified version of it, you must provide attribution to Red Hat, Inc. and provide a link to the original. If the document is modified, all Red Hat trademarks must be removed. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, MetaMatrix, Fedora, the Infinity Logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. Linux ® is the registered trademark of Linus Torvalds in the United States and other countries. Java ® is a registered trademark of Oracle and/or its affiliates. XFS ® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. MySQL ® is a registered trademark of MySQL AB in the United States, the European Union and other countries. Node.js ® is an official trademark of Joyent. Red Hat Software Collections is not formally related to or endorsed by the official Joyent Node.js open source or commercial project. -
Speeding up Linux Disk Encryption Ignat Korchagin @Ignatkn $ Whoami
Speeding Up Linux Disk Encryption Ignat Korchagin @ignatkn $ whoami ● Performance and security at Cloudflare ● Passionate about security and crypto ● Enjoy low level programming @ignatkn Encrypting data at rest The storage stack applications @ignatkn The storage stack applications filesystems @ignatkn The storage stack applications filesystems block subsystem @ignatkn The storage stack applications filesystems block subsystem storage hardware @ignatkn Encryption at rest layers applications filesystems block subsystem SED, OPAL storage hardware @ignatkn Encryption at rest layers applications filesystems LUKS/dm-crypt, BitLocker, FileVault block subsystem SED, OPAL storage hardware @ignatkn Encryption at rest layers applications ecryptfs, ext4 encryption or fscrypt filesystems LUKS/dm-crypt, BitLocker, FileVault block subsystem SED, OPAL storage hardware @ignatkn Encryption at rest layers DBMS, PGP, OpenSSL, Themis applications ecryptfs, ext4 encryption or fscrypt filesystems LUKS/dm-crypt, BitLocker, FileVault block subsystem SED, OPAL storage hardware @ignatkn Storage hardware encryption Pros: ● it’s there ● little configuration needed ● fully transparent to applications ● usually faster than other layers @ignatkn Storage hardware encryption Pros: ● it’s there ● little configuration needed ● fully transparent to applications ● usually faster than other layers Cons: ● no visibility into the implementation ● no auditability ● sometimes poor security https://support.microsoft.com/en-us/help/4516071/windows-10-update-kb4516071 @ignatkn Block -
Linux Kernel and Driver Development Training Slides
Linux Kernel and Driver Development Training Linux Kernel and Driver Development Training © Copyright 2004-2021, Bootlin. Creative Commons BY-SA 3.0 license. Latest update: October 9, 2021. Document updates and sources: https://bootlin.com/doc/training/linux-kernel Corrections, suggestions, contributions and translations are welcome! embedded Linux and kernel engineering Send them to [email protected] - Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 1/470 Rights to copy © Copyright 2004-2021, Bootlin License: Creative Commons Attribution - Share Alike 3.0 https://creativecommons.org/licenses/by-sa/3.0/legalcode You are free: I to copy, distribute, display, and perform the work I to make derivative works I to make commercial use of the work Under the following conditions: I Attribution. You must give the original author credit. I Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license identical to this one. I For any reuse or distribution, you must make clear to others the license terms of this work. I Any of these conditions can be waived if you get permission from the copyright holder. Your fair use and other rights are in no way affected by the above. Document sources: https://github.com/bootlin/training-materials/ - Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 2/470 Hyperlinks in the document There are many hyperlinks in the document I Regular hyperlinks: https://kernel.org/ I Kernel documentation links: dev-tools/kasan I Links to kernel source files and directories: drivers/input/ include/linux/fb.h I Links to the declarations, definitions and instances of kernel symbols (functions, types, data, structures): platform_get_irq() GFP_KERNEL struct file_operations - Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 3/470 Company at a glance I Engineering company created in 2004, named ”Free Electrons” until Feb. -
The Linux Graphics Stack Attributions
I - Hardware : Anatomy of a GPU II - Host : The Linux graphics stack Attributions Introduction to GPUs and to the Linux Graphics Stack Martin Peres CC By-SA 3.0 Nouveau developer Ph.D. student at LaBRI November 26, 2012 1 / 36 I - Hardware : Anatomy of a GPU II - Host : The Linux graphics stack Attributions General overview Outline 1 I - Hardware : Anatomy of a GPU General overview Driving screens Host < − > GPU communication 2 II - Host : The Linux graphics stack General overview DRM and libdrm Mesa X11 Wayland X11 vs Wayland 3 Attributions Attributions 2 / 36 I - Hardware : Anatomy of a GPU II - Host : The Linux graphics stack Attributions General overview General overview of a modern GPU's functions Display content on a screen Accelerate 2D operations Accelerate 3D operations Decode videos Accelerate scientific calculations 3 / 36 I - Hardware : Anatomy of a GPU II - Host : The Linux graphics stack Attributions General overview CPU Clock Front-side Graphics Generator bus card slot Chipset Memory Slots High-speed graphics bus (AGP or PCI Northbridge Memory Express) bus (memory controller hub) Internal Bus PCI Bus Onboard Southbridge graphics PCI (I/O controller controller Bus hub) IDE SATA USB Cables and Ethernet ports leading Audio Codec CMOS Memory off-board PCI Slots LPC Bus Super I/O Serial Port Parallel Port Flash ROM Floppy Disk Keyboard (BIOS) Mouse 4 / 36 I - Hardware : Anatomy of a GPU II - Host : The Linux graphics stack Attributions General overview Hardware architecture GPU: Where all the calculations are made VRAM: Stores -
DM-Relay - Safe Laptop Mode Via Linux Device Mapper
' $ DM-Relay - Safe Laptop Mode via Linux Device Mapper Study Thesis by cand. inform. Fabian Franz at the Faculty of Informatics Supervisor: Prof. Dr. Frank Bellosa Supervising Research Assistant: Dipl.-Inform. Konrad Miller Day of completion: 04/05/2010 &KIT – Universitat¨ des Landes Baden-Wurttemberg¨ und nationales Forschungszentrum in der Helmholtz-Gemeinschaft www.kit.edu % I hereby declare that this thesis is my own original work which I created without illegitimate help by others, that I have not used any other sources or resources than the ones indicated and that due acknowledgment is given where reference is made to the work of others. Karlsruhe, April 5th, 2010 Contents Deutsche Zusammenfassung xi 1 Introduction 1 1.1 Problem Definition . .1 1.2 Objectives . .1 1.3 Methodology . .1 1.4 Contribution . .2 1.5 Thesis Outline . .2 2 Background 3 2.1 Problems of Disk Power Management . .3 2.2 State of the Art . .4 2.3 Summary of this chapter . .8 3 Analysis 9 3.1 Pro and Contra . .9 3.2 A new approach . 13 3.3 Analysis of Proposal . 15 3.4 Summary of this chapter . 17 4 Design 19 4.1 Common problems . 19 4.2 System-Design . 21 4.3 Summary of this chapter . 21 5 Implementation of a dm-module for the Linux kernel 23 5.1 System-Architecture . 24 5.2 Log suitable for Flash-Storage . 28 5.3 Using dm-relay in practice . 31 5.4 Summary of this chapter . 31 vi Contents 6 Evaluation 33 6.1 Methodology . 33 6.2 Benchmarking setup . -
Freiesmagazin 07/2009
freiesMagazin Juli 2009 Topthemen dieser Ausgabe ZevenOS – Linux goes BeOS Seite 4 Ein biologisches Phänomen hat längst Einzug in die Linux-Welt gehalten: Mimikry. Das bedeu- tet, dass eine Spezies wegen bestimmter Vorteile eine andere Spezies nachahmt, z. B. legt sich eine harmlose Fliegenart das Aussehen von Wespen zu. Einer der neueren Fälle in der Linux-Welt ist ZevenOS, eine Linux-Distribution, die auf Ubuntu aufbaut. Das Besondere: Sie will im Aussehen und in der Benutzung etwas vom Feeling des legendären und leider im Nebel der Geschichte verschwundenen Betriebssystems BeOS vermitteln. (weiterlesen) easyVDR – The easy VDR Distribution Seite 12 Die Distribution easyVDR ist eine unter der GNU General Public License (GPL) veröffentlichte Distribution, die sich den Themen Video und TV widmet. Hat man noch ausgemusterte Rech- ner zuhause, lassen sich diese mit der Hilfe von easyVDR als digitaler Videorekorder nutzen – mit dem Vorteil, in vielen Belangen anpassbar zu sein; ein digitaler Selbstbaukasten sozusa- gen. (weiterlesen) Was bieten freie CRM-Lösungen? – Im Vergleich: SugarCRM und vtiger CRM Seite 34 CRM steht für Customer Relationship Management und beschreibt die Verwaltung von Kunden- daten und Kundenbeziehungen. Anhand eines konkreten Anwendungsfalls der fiktiven Firma EVENTO, einer Veranstaltungsagentur mit dem Schwerpunkt auf außergewöhnliche Orte, wer- den zwei CRM-Lösungen verglichen. Aus der Vielzahl an frei verfügbaren Programmen wurden die zwei populären Vertreter SugarCRM Version 5.2.0c und vtiger CRM Version 5.0.4 ausge- wählt. (weiterlesen) © freiesMagazin GNU FDL Ausgabe 07/2009 ISSN 1867-7991 MAGAZIN Editorial Anleitung: Wie verprellt man eine Community? Wir befinden uns im Jahre 2009 n. Chr. Die ganze ten [5]. -
A Hybrid Swapping Scheme Based on Per-Process Reclaim for Performance Improvement of Android Smartphones (August 2018)
Received August 19, 2018, accepted September 14, 2018, date of publication October 1, 2018, date of current version October 25, 2018. Digital Object Identifier 10.1109/ACCESS.2018.2872794 A Hybrid Swapping Scheme Based On Per-Process Reclaim for Performance Improvement of Android Smartphones (August 2018) JUNYEONG HAN 1, SUNGEUN KIM1, SUNGYOUNG LEE1, JAEHWAN LEE2, AND SUNG JO KIM2 1LG Electronics, Seoul 07336, South Korea 2School of Software, Chung-Ang University, Seoul 06974, South Korea Corresponding author: Sung Jo Kim ([email protected]) This work was supported in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education under Grant 2016R1D1A1B03931004 and in part by the Chung-Ang University Research Scholarship Grants in 2015. ABSTRACT As a way to increase the actual main memory capacity of Android smartphones, most of them make use of zRAM swapping, but it has limitation in increasing its capacity since it utilizes main memory. Unfortunately, they cannot use secondary storage as a swap space due to the long response time and wear-out problem. In this paper, we propose a hybrid swapping scheme based on per-process reclaim that supports both secondary-storage swapping and zRAM swapping. It attempts to swap out all the pages in the working set of a process to a zRAM swap space rather than killing the process selected by a low-memory killer, and to swap out the least recently used pages into a secondary storage swap space. The main reason being is that frequently swap- in/out pages use the zRAM swap space while less frequently swap-in/out pages use the secondary storage swap space, in order to reduce the page operation cost. -
Sbadmin Device-Mapper Multipath Devices
DM-Multipath Guide Version 8.2 SBAdmin and DM-Multipath Guide The purpose of this guide is to provide the steps necessary to use SBAdmin in an environment where SAN storage is used in conjunction with device-mapper multipath devices. When a system is using dm-multipath devices, there are several considerations that need to be addressed. The device naming, tools available, and device modules loaded become critical issues in discovery of devices and recreation of those devices upon restore. The information in this guide should provide the necessary information to create backups from systems using dm-multipath devices or for users who want to migrate a system backup to multipath devices. This guide is not intended to assist users in the initial setup of dm-multipath devices. For information on initially setting up dm-multipath devices, contact your Linux OS support vendors directly. Requirements for DM-Multipath support Software requirements Support for dm-multipath devices has been available to Linux users for years, however, how the devices are created and supported by distributions has changed greatly over time as the technology matures. Below is the minimal level of the tools and file sets that SBAdmin has tested and will support. dm-multipath-tools version 0.4.5 (also known as device-mapper-multipath) device-mapper version 1.02 udev version 039-10 Device detection requirements Device naming If you plan on creating backups from a system using dm-multipath devices, the SBAdmin software must be able to recognize the devices by name prior to creating the backup. Multipath devices can be named several different ways such as by the World Wide Identifier (WWID), dm-[0-9], mpath[a-z], and mpath[0-9]. -
I.MX Encrypted Storage Using CAAM Secure Keys Rev
AN12714 i.MX Encrypted Storage Using CAAM Secure Keys Rev. 1 — 11/2020 Application Note Contents 1 Preface 1 Preface............................................1 Devices often contain highly sensitive information which is consistently at risk 1.1 Intended audience and scope......1 1.2 References...................................1 to get physically lost or stolen. Setting user passwords does not guarantee data 2 Overview......................................... 1 protection against unauthorized access. The attackers can simply bypass the 2.1 DM-Crypt......................................1 software system of a device and access the data storage directly. Only the 2.2 DM-Crypt accelerated by CAAM use of encryption can guarantee data confidentiality in the case where storage .....................................................2 media is directly accessed. 2.3 DM-Crypt using CAAM's Secure Key...............................................3 This document provides steps to run a transparent storage encryption at block 3 Hands-On........................................4 level using DM-Crypt taking advantage of the secure key feature provided 3.1 Installation....................................4 by i.MXs Cryptographic Accelerator and Assurance Module (CAAM). The 3.2 Usage...........................................6 document applies to all i.MX SoCs having CAAM module. The feature is not 3.3 Performance................................ 9 available on i.MX SoCs with DCP. 4 Revision History............................ 10 5 Appendix A. Configuration........... -
Think ALL Distros Offer the Best Linux Devsecops Environment?
Marc Staimer, Dragon Slayor Consulting WHITE PAPER Think All Distros Offer the Best Linux DevSecOps What You’re Not Being Told About Environment? Database as a Service (DBaaS) Think Again! WHITE PAPER • Think Again! Think All Distros Provide the Best Linux DevSecOps Environment? Think Again! Introduction DevOps is changing. Developing code with after the fact bolt-on security is dangerously flawed. When that bolt-on fails to correct exploitable code vulnerabilities, it puts the entire organization at risk. Security has been generally an afterthought for many doing DevOps. It was often assumed the IT organization’s systemic multiple layers of security measures and appliances would protect any new code from malware or breaches. And besides, developing code with security built in, adds tasks and steps to development and testing time. More tasks and steps delay time-to-market. Multi-tenant clouds have radically changed the market. Any vulnerability in a world with increasing cyber-attacks, can put millions of user’s data at risk. Those legacy DevOps attitudes are unsound. They are potentially quite costly in the current environment. Consider that nearly every developed and most developing countries have enacted laws and regulation protecting personally identifiable information or PII1. PII is incredibly valuable to cybercriminals. Stealing PII enables them to commit many cybercrimes including the cybertheft of identities, finances, intellectual property, admin privileges, and much more. PII can also be sold on the web. Those PII laws and regulations are meant to force IT organizations to protect PII. Non-compliance of these laws and regulations often carry punitive financial penalties. -
Armadillo-640 製品マニュアル
Armadillo-640 製品マニュアル A6400-U00Z A6400-D00Z A6400-B00Z Version 1.14.0 2020/07/13 株式会社アットマークテクノ [https://www.atmark-techno.com] Armadillo サイト [https://armadillo.atmark-techno.com] Armadillo-640 製品マニュアル 株式会社アットマークテクノ 製作著作 © 2018-2020 Atmark Techno, Inc. Version 1.14.0 2020/07/13 Armadillo-640 製品マニュアル Armadillo-640 製品マニュアル 目次 1. はじめに ........................................................................................................................................ 15 1.1. 本書で扱うこと扱わないこと ............................................................................................. 15 1.1.1. 扱うこと .................................................................................................................. 15 1.1.2. 扱わないこと ........................................................................................................... 15 1.2. 本書で必要となる知識と想定する読者 ............................................................................... 15 1.3. ユーザー限定コンテンツ .................................................................................................... 16 1.4. 本書および関連ファイルのバージョンについて ................................................................. 16 1.5. 本書の構成 ......................................................................................................................... 16 1.6. 表記について ...................................................................................................................... 17 1.6.1. フォント ................................................................................................................. -
Linux, Yocto and Fpgas
Embedded Open Source Experts Linux, Yocto and FPGAs Integrating Linux and Yocto builds into different SoCs From a Linux software perspective: ➤ Increased demand for Linux on FPGAs ➤ Many things to mange, both technical and practical ➤ FPGAs with integrated CPU cores – very similar many other SoCs Here are some experiences and observations... © Codiax 2019 ● Page 2 Why use Linux? ➤ De-facto standard ➤ Huge HW support ➤ FOSS ➤ Flexible ➤ Adaptable ➤ Stable ➤ Scalable ➤ Royalty free ➤ Vendor independent ➤ Large community ➤ Long lifetime Why not Linux? ➤ Too big ➤ Real-time requirements ➤ Certification ➤ Boot time ➤ Licensing ➤ Too open? Desktop Shells: Desktop Display server: Display BrailleDisplay Touch-Screen Mouse & Keyboard Wayland Compositor Wayland + development tools = a lot code!of source Linux system example weston, clayton,mutter,KWin evdev libinput GNOME Shell D radeon nouveau lima etna_viv freedreno tegra-re lima nouveau radeon freedreno etna_viv e libwayland-server libwayland-server s Cinnamon k t o kms p Linux kernel, Linux kernel, Plasma 2 w i (Kernel Mode Setting) Mode (Kernel d g Cairo-Dock e t s drm (Direct Rendering Manager) Rendering (Direct drm cache coherent L2-Caches L2-Caches cache coherent CPU &GPU Enlight. DR19 System libraries: System oflibraries): form (in the Toolkits Interface User µClibc Pango glibc glibc main memory possibly adaptations to Wayland/Mir libwayland / COGL libwayland Cairo Cairo (Xr) GTK+ Clutter 2D Application 2D GModule GThread GThread GLib GObject Glib GIO ATK devicedrivers other& modules System