Linux – Steve Scargall

How To Linux Performance Troubleshooting

Using ltrace to see what ipmctl and ndctl are doing

Occasionally, it is necessary to debug commands that are slow. Or you may simply be interested in learning how the tools work. While there are many strategies, here are some simple methods that show code flow and timing information. To...

June 23, 2021

How to Boot Linux from Intel® Optane™ Persistent Memory

How To Linux

How to Boot Linux from Intel® Optane™ Persistent Memory

Introduction In this article, I will demonstrate how to configure a system with Intel Optane Persistent Memory (PMem) and use part of the PMem as a boot device. This little known feature can reduce boot times for those that need...

June 7, 2021

How to build an upstream Fedora Kernel from source

How To Linux

How to build an upstream Fedora Kernel from source

I typically keep my Fedora system current, updating it once every week or two. More recently, I wanted to test the Idle Page Tracking feature, but this wasn’t enabled in the default kernel provided by Fedora. To enable the feature,...

September 14, 2020

Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

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Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

The Linux ‘dm-writecache’ target allows for writeback caching of newly written data to an SSD or NVMe using persistent memory will achieve much better performance in Linux Kernel 5.8. Red Hat developer Mikulas Patocka has been working to enhance the...

May 30, 2020

How To Verify Linux Kernel Support for Persistent Memory

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How To Verify Linux Kernel Support for Persistent Memory

Linux Kernel support for persistent memory was first delivered in version 4.0 of the mainline kernel, however, it was not enabled by default until version 4.2. If you use a Linux distribution that uses kernel 4.2 or later, or the...

February 11, 2020

How To Extend Volatile System Memory (RAM) using Persistent Memory on Linux

How To Linux

How To Extend Volatile System Memory (RAM) using Persistent Memory on Linux

Intel(R) Optane(TM) DataCenter Persistent Memory delivers a unique combination of affordable large capacity and support for data persistence. Electrically compatible with DDR4, large capacity modules up to 512GB each can be installed in compatible servers alongside DDR on the memory...

July 9, 2019

Category: Linux

Using ltrace to see what ipmctl and ndctl are doing

How to Boot Linux from Intel® Optane™ Persistent Memory

How to build an upstream Fedora Kernel from source

Linux Device Mapper WriteCache (dm-writecache) performance improvements in Linux Kernel 5.8

How To Verify Linux Kernel Support for Persistent Memory

How To Extend Volatile System Memory (RAM) using Persistent Memory on Linux

Using ltrace to see what ipmctl and ndctl are doing

How To Install and Boot Microsoft Hyper-V 2019 from Persistent Memory (or not)

How To Install and Boot Microsoft Windows Server 2022 from Persistent Memory (or not)