In this blog post, Oracle Linux kernel developer Rahul Yadav discusses a few details about version 2 of his libresource project. As discussed in my previous...
In this blog post, Oracle Linux kernel developer Rahul Yadav discusses a few details about version 2 of his libresource project. As discussed in my previous blog[1] on libresource, we are working on a library which provides APIs to get system resource information for user-land applications. The system resource information includes information related to memory, networking, devices and various other statistics. Currently an application developer needs to read this information...
In this blog post, Oracle Linux kernel developer Rahul Yadav discusses a few details about version 2 of his libresource project. As discussed in my previous blog[1] on libresource, we are working on a...
In this blog, Oracle Linux kernel developers Alan Maguire and Knut Omang explain how to write Kernel Test Framework tests. KTF is available as a standalone git...
In this blog, Oracle Linux kernel developers Alan Maguire and Knut Omang explain how to write Kernel Test Framework tests. KTF is available as a standalone git repository, but we are also working to offer it as a patch set for integration into the kernel. Read more about KTF in our introductory blog post, here: https://blogs.oracle.com/linux/oracles-new-kernel-test-framework-for-linux-v2 Writing new KTF (Kernel Test Framework) tests Here we're going to try and describe how...
In this blog, Oracle Linux kernel developers Alan Maguire and Knut Omang explain how to write Kernel Test Framework tests. KTF is available as a standalone git repository, but we are also working to...
Oracle Linux kernel developer Steve Sistare contributes this article on speeding up kernel reboots for development and for production systems. Fast reboot with...
Oracle Linux kernel developer Steve Sistare contributes this article on speeding up kernel reboots for development and for production systems. Fast reboot with kexec The kexec command loads a new kernel and jumps directly to it, bypassing firmware and grub. It is most often used as the first step in generating a crash dump, but it can also be used to perform an administrative reboot. The time saved by skipping firmware is substantial on a server with large memory, many CPUS,...
Oracle Linux kernel developer Steve Sistare contributes this article on speeding up kernel reboots for development and for production systems. Fast reboot with kexec The kexec command loads a new...
Oracle Linux Kernel developer Lance Hartmann contributes this blog post on using SPDK, the Storage Performance Development Kit. Introducing the SPDK Slated to...
Oracle Linux Kernel developer Lance Hartmann contributes this blog post on using SPDK, the Storage Performance Development Kit. Introducing the SPDK Slated to arrive soon in the developer yum channel via ULN, the Storage Performance Development Kit SPDK is an open-source project providing user space tools and libraries for writing high performance, scalable storage applications built largely but not solely around a user space NVMe driver. Harnessing the power of multi-core...
Oracle Linux Kernel developer Lance Hartmann contributes this blog post on using SPDK, the Storage Performance Development Kit. Introducing the SPDK Slated to arrive soon in the developer yum channel...
Oracle Linux kernel developer Mike Kravetz, who is also the hugetlbfs maintainer, attended Linux Plumbers Conference 2018 and shares some of his thought about...
Oracle Linux kernel developer Mike Kravetz, who is also the hugetlbfs maintainer, attended Linux Plumbers Conference 2018 and shares some of his thought about the conference especially around huge pages in this blog post. Huge Pages and Contiguous Allocations at LPC 2018 At the 2018 Linux Plumbers Conference, Huge Page utilization was discussed during the Performance and Scalability microconf, and the topic of Contiguous Allocations was discussed during the RDMA microconf....
Oracle Linux kernel developer Mike Kravetz, who is also the hugetlbfs maintainer, attended Linux Plumbers Conference 2018 and shares some of his thought about the conference especially around huge...
Notes on BPF (6) - BPF packet transformation using tc Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in...
Notes on BPF (6) - BPF packet transformation using tc Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at the kernel's "Berkeley Packet Filter" -- a useful and extensible kernel function for much more than packet filtering. In earlier blog entries, we've tried to run through some of the concepts in BPF and hopefully now we're ready to try writing some BPF programs. One of the great use cases for BPF is in...
Notes on BPF (6) - BPF packet transformation using tc Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at the kernel's...
Notes on BPF (5) - BPF bytecodes and the BPF verifier Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in...
Notes on BPF (5) - BPF bytecodes and the BPF verifier Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at the kernel's "Berkeley Packet Filter" -- a useful and extensible kernel function for much more than packet filtering. Previously, we've described what sorts of BPF programs can be used; the BPF helper functions those programs can call the ways BPF programs can communicate with userpace how to set up a...
Notes on BPF (5) - BPF bytecodes and the BPF verifier Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at the kernel's...
Notes on BPF (4) - Setting up your environment to build BPF programs Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he...
Notes on BPF (4) - Setting up your environment to build BPF programs Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at the kernel's "Berkeley Packet Filter" -- a useful and extensible kernel function for much more than packet filtering. Here I'm going to describe how I set up my programming environment to build BPF programs. The advice is mostly based around using Linux UEK5, which is based on a 4.14 Linux...
Notes on BPF (4) - Setting up your environment to build BPF programs Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at...
Notes on BPF (3) - How BPF communicates with userspace - BPF maps, perf events, bpf_trace_printk Oracle Linux kernel developer Alan Maguire presents this...
Notes on BPF (3) - How BPF communicates with userspace - BPF maps, perf events, bpf_trace_printk Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at the kernel's "Berkeley Packet Filter" -- a useful and extensible kernel function for much more than packet filtering. We've seen how userspace sets up BPF programs, but once a program is attached and running, how do we gather information from it? There are three...
Notes on BPF (3) - How BPF communicates with userspace - BPF maps, perf events, bpf_trace_printk Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an...
