Shannon Nelson from the Oracle Linux Kernel Development team offers these tips and tricks to help make host network diagnostics easier. He also includes a...
Shannon Nelson from the Oracle Linux Kernel Development team offers these tips and tricks to help make host network diagnostics easier. He also includes a recommended playlist for accompanying your debugging! Ain't Misbehavin' (Dinah Washington) As with many debugging situations, digging into and resolving a network-based problem can seem like a lot of pure guess and magic. In the networking realm, not only do we have the host system's processes and configurations to...
Shannon Nelson from the Oracle Linux Kernel Development team offers these tips and tricks to help make host network diagnostics easier. He also includes a recommended playlist for accompanying...
Oracle Linux kernel developer Rahul Yadav kicked off a new project in LXC this year, called libresource. In this blog post, he talks about how to use...
Oracle Linux kernel developer Rahul Yadav kicked off a new project in LXC this year, called libresource. In this blog post, he talks about how to use libresource to effectively read system statistics in a stable manner. This project is hosted on github at https://github.com/lxc/libresource System resource information, like memory, network and device statistics, are crucial for system administrators to understand the inner workings of their systems, and are increasingly being...
Oracle Linux kernel developer Rahul Yadav kicked off a new project in LXC this year, called libresource. In this blog post, he talks about how to use libresource to effectively read system...
Oracle Linux kernel developer Nagarathnam Muthusamy contributed this blog post on the challenges of translating pids (process IDs) between different namespaces....
Oracle Linux kernel developer Nagarathnam Muthusamy contributed this blog post on the challenges of translating pids (process IDs) between different namespaces. This is a feature currently lacking from namespace support in the Linux kernel and is an important feature to enable multitenant use of the Oracle database via CDBs. Process ID(PID) namespace facility in Linux kernel has been an effective way of providing isolation between groups of processes which in turn has been...
Oracle Linux kernel developer Nagarathnam Muthusamy contributed this blog post on the challenges of translating pids (process IDs) between different namespaces. This is a feature currently lacking...
This blog post was written by kernel developers Jon Helman and Rob Gardner, whose code for the Oracle Data Analytics driver was accepted into the Linux source...
This blog post was written by kernel developers Jon Helman and Rob Gardner, whose code for the Oracle Data Analytics driver was accepted into the Linux source earlier this year. This is our ultimate installment in the kernel blog series on Linux enablement for SPARC chip features. Oracle DAX Support in Linux The Oracle Data Analytics Accelerator (DAX) is a coprocessor built into the SPARC M7, S7, and M8 chips, which can perform various operations on data streams. These...
This blog post was written by kernel developers Jon Helman and Rob Gardner, whose code for the Oracle Data Analytics driver was accepted into the Linux source earlier this year. This is our ultimate...
In this update, we share Btrfs functionality that helps make moving data between Btrfs volumes faster and more efficient. It's not new feature but it's an...
In this update, we share Btrfs functionality that helps make moving data between Btrfs volumes faster and more efficient. It's not new feature but it's an underutilized feature which showcases the unique capabilities of Btrfs as the native Linux copy-on-write filesystem. Btrfs send is introduced in Linux v3.5 and the amazing part is that it offers the ability of incremental update. Here I'll go through the command as a user and try to understand it as a btrfs developer. A...
In this update, we share Btrfs functionality that helps make moving data between Btrfs volumes faster and more efficient. It's not new feature but it's an underutilized feature which showcases...
In January, researchers disclosed flaws in speculative execution known as Meltdown and Spectre. Oracle published official guidance in this support note:...
In January, researchers disclosed flaws in speculative execution known as Meltdown and Spectre. Oracle published official guidance in this support note: Responding to the Spectre and Meltdown vulnerabilities (CVE-2017-5715, CVE-2017-5753, and CVE-2017-5754) in Oracle Linux and Oracle VM on Oracle X86 Servers (Doc ID 2370398.1) At that time, we shipped mitigations for these security issues which depended on special Intel microcode. We're excited to announce that our latest...
In January, researchers disclosed flaws in speculative execution known as Meltdown and Spectre. Oracle published official guidance in this support note: Responding to the Spectre and...
Shannon Nelson is a Linux kernel driver expert and kernel developer who has been looking at accelerating IPsec performance. In this blog blog post, he shows how...
Shannon Nelson is a Linux kernel driver expert and kernel developer who has been looking at accelerating IPsec performance. In this blog blog post, he shows how to reduce the overhead of running with IPsec enabled. IPsec has been gaining in popularity, but is quite a hit against network throughput, making multi-Gigabit network connections slow to Megabit speeds. With support for IPsec hardware offload recently added to the Linux kernel's network stack, Oracle has added...
Shannon Nelson is a Linux kernel driver expert and kernel developer who has been looking at accelerating IPsec performance. In this blog blog post, he shows how to reduce the overhead of running...
The source for UEK has always been available at oss.oracle.com, as a git repository with full git history. Starting now, we'll also be posting the UEK source on...
The source for UEK has always been available at oss.oracle.com, as a git repository with full git history. Starting now, we'll also be posting the UEK source on github.com/oracle/linux-uek. By doing so, we intend to increase the visibility for our work and to make it even easier for people to access the source for UEK. We will also use this repository for working with developers at partner companies and in the Linux community. The repository contains the source for the...
The source for UEK has always been available at oss.oracle.com, as a git repository with full git history. Starting now, we'll also be posting the UEK source on github.com/oracle/linux-uek. By doing...
In this post from Alan Maguire, he shows how to use DTrace to inspect common network-related system calls. DTrace is a powerful tracing tool for understanding...
In this post from Alan Maguire, he shows how to use DTrace to inspect common network-related system calls. DTrace is a powerful tracing tool for understanding user and kernel processes. We've been steadily adding DTrace support for networking in Oracle Linux. Let's see how we can use these probes to better understand network behaviour. Let's do a quick tour to see what sort of support is available for dynamic tracing the network stack. Before diving into the details though,...
In this post from Alan Maguire, he shows how to use DTrace to inspect common network-related system calls. DTrace is a powerful tracing tool for understanding user and kernel processes. We've been...
