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Tracing NFS: Beyond tcpdump

This blog entry is by Linux kernel developer Chuck Lever. tcpdump and rpcdebug have historically been the go-to tools for NFS client troubleshooting. Lately they are showing their age. At Oracle, we want to identify existing tools and provide new ones that can observe NFS client operation under heavy workloads and on high performance network fabrics without affecting timing or risking loss of capture information. Historical NFS and RPC Debugging Facilities Unless network...

Wednesday, November 8, 2017 | Read More

Accelerating Linux Boot Time

This blog post is written by Pasha Tatashin, on the Oracle Linux kernel team. Linux Reboot There are many reasons why it is important for machines to reboot quickly. Here are just a few examples: Increase uptime and availability Improve customer experience: machines feel faster overall when the boot/reboot process is fast Due to a shorter downtime, customers may choose to apply critical patches faster, thereby improving security All of the above provide a competitive advantage. Lin...

Wednesday, October 25, 2017 | Read More

ktask: A Generic Framework for Parallelizing CPU-Intensive Work

Daniel Jordan from our core kernel team wrote up a review of his ktask framework, which has been submitted for review to the Linux Kernel Mailing list. This post has been edited to add a link to lstat.sh below. Lately I've been working on a project called ktask, which allows the Linux kernel to parallelize large tasks.  Although these tasks always run in kernel context, they may be initiated directly in the kernel or indirectly through a system call from an application. In...

Wednesday, October 11, 2017 | Linux | Read More

What's New in Linux Development at Oracle!

With the transition of enterprise workloads into the cloud, the number of Oracle workloads running on Linux continues to increase. Oracle has long invested in Linux (the first commercial database on Linux in 1998, the first cluster filesystem on Linux--OCFS2--a few years later), and with the continued shift towards cloud we want to ensure the best possible experience for customers running enterprise workloads on Linux. Our development effort focuses on performance, stability...

Wednesday, October 4, 2017 | Linux | Read More

Upcoming XFS Work in Linux v4.8 v4.9 and v4.10+, by Darrick Wong

The following is a write-up by Oracle mainline Linux kernel engineer, Darrick Wong. For the past year I have been working on a bunch of new features for the XFS filesystem on Linux. Modern-day XFS is a direct descendant of the original XFS code from SGI Irix that was donated long ago. The goals are the same -- XFS is intended to behave consistently as it scales to large storage and many files. v4.8: Reverse Mapping Back in 2014, Dave Chinner prototyped a mechanism for...

Tuesday, November 8, 2016 | Linux | Read More

Oracle Linux Kernel Developers at LinuxCon Japan

Several Oracle Linux kernel developers will be speaking at LinuxCon Japan next week in Tokyo, from July 13th-15th. Feature Rich BTRFS is Getting Richer With Encryption - Anand Jain Introduction to Coccinelle and SmPL - Vaishali Thakkar Linux Kernel Security Update - James Morris James Morris will also participate in the kernel developer panel along with other senior community kernel developers.

Friday, July 8, 2016 | Linux | Read More

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