Mike Kravetz contributed this blog post about uses for hugetlbfs in the community! Any Operating System that implements virtual memory must do translations from...
Mike Kravetz contributed this blog post about uses for hugetlbfs in the community! Any Operating System that implements virtual memory must do translations from virtual to physical addresses. Such translations could be accomplished entirely by software, but modern processor memory management units(MMU) provide a mechanism to speed up this process. This is accomplished by keeping a cache of recently used virtual to physical translations in something called the Translation...
Mike Kravetz contributed this blog post about uses for hugetlbfs in the community! Any Operating System that implements virtual memory must do translations from virtual to physical addresses. ...
Tushar Dave wrote this blog post on his experiences with making Linux run well on SPARC systems. Earlier last year I had a chance to deep dive into SPARC I/O...
Tushar Dave wrote this blog post on his experiences with making Linux run well on SPARC systems. Earlier last year I had a chance to deep dive into SPARC I/O architecture while trying to root cause why next generation of SPARC machines running Linux suddenly became unresponsive. During initial investigation it looks like networking issue however I never thought of going deep into IOMMU and kernel DMA subsystem. IOMMU and DMA are sensitive areas of the kernel and extreme care...
Tushar Dave wrote this blog post on his experiences with making Linux run well on SPARC systems. Earlier last year I had a chance to deep dive into SPARC I/O architecture while trying to root...
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...
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...
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,...
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...
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...
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:...
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...
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...
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...
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...
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...
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...
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 theXFS...
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 theXFS filesystem on Linux. Modern-day XFS is a direct descendant of theoriginal XFS code from SGI Irix that was donated long ago. The goalsare the same -- XFS is intended to behave consistently as it scales tolarge storage and many files. v4.8: Reverse Mapping Back in 2014, Dave Chinner prototyped a mechanism for storing...
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 theXFS filesystem on Linux. Modern-day XFS is a...
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...
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 JainIntroduction to Coccinelle and SmPL - Vaishali ThakkarLinux Kernel Security Update - James MorrisJames Morris will also participate in the kernel developer panel along with other senior community kernel developers.
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 JainIntroduction...
This is a posting by Oracle Linux Kernel Engineer, Dan Carpenter. In this, he provides an overview of Smatch, the C static analysis tool which he developed,...
This is a posting by Oracle Linux Kernel Engineer, Dan Carpenter. In this, he provides an overview of Smatch, the C static analysis tool which he developed, and which he uses to test the mainline Linux kernel code for security bugs. My job at Oracle is focused on finding security bugs in the Linuxkernel. My favorite type of bug is off by one bugs where the code says: if (x > ARRAY_SIZE(table))return -EINVAL; The problem is that > should be changed to >= it so it says: if (x...
This is a posting by Oracle Linux Kernel Engineer, Dan Carpenter. In this, he provides an overview of Smatch, the C static analysis tool which he developed, and which he uses to test the mainline...
