Using Tracepoints to Debug iSCSI Modules Oracle Linux kernel developer Fred Herard offered this blog post on how to use tracepoints with iSCSI kernel modules....
Using Tracepoints to Debug iSCSI Modules Oracle Linux kernel developer Fred Herard offered this blog post on how to use tracepoints with iSCSI kernel modules. The scsi_transport_iscsi, libiscsi, libiscsi_tcp, and iscsi_tcp modules have been modified to leverage Linux Kernel Tracepoints to capture debug messages. Before this modification, debug messages for these modules were simply directed to syslog when enabled. This enhancement gives users the option to use Tracepoint...
Using Tracepoints to Debug iSCSI Modules Oracle Linux kernel developer Fred Herard offered this blog post on how to use tracepoints with iSCSI kernel modules. The scsi_transport_iscsi, libiscsi,...
Oracle Linux kernel developer Tom Hromatka attended Linux Security Summit NA 2019. In this blog post, Tom discusses the presentation that he gave as well as...
Oracle Linux kernel developer Tom Hromatka attended Linux Security Summit NA 2019. In this blog post, Tom discusses the presentation that he gave as well as other talks he found interesting. Linux Security Summit North America 2019 I was one of the lucky attendees at the Linux Security Summit North America 2019 conference in sunny San Diego from August 19th through the 21st. Three major topics dominated this year's agenda - trusted computing, containers, and overall kernel...
Oracle Linux kernel developer Tom Hromatka attended Linux Security Summit NA 2019. In this blog post, Tom discusses the presentation that he gave as well as other talks he found interesting....
In this blog post, Linux kernel developer Tom Hromatka talks about becoming a co-maintainer of libsecccomp, what it means and his recent presentation at Linux...
In this blog post, Linux kernel developer Tom Hromatka talks about becoming a co-maintainer of libsecccomp, what it means and his recent presentation at Linux Security Summit North America 2019. Seccomp Maintainer Recently I was named a libseccomp co-maintainer. As a brief background, the Linux kernel provides a mechanism - called SECure COMPuting mode or seccomp for short - to block a process or thread's access to some syscalls. seccomp filters are written in a...
In this blog post, Linux kernel developer Tom Hromatka talks about becoming a co-maintainer of libsecccomp, what it means and his recent presentation at Linux Security Summit North America 2019. ...
Notes on BPF (7) - BPF, tc and Generic Segmentation Offload Oracle Linux kernel developer Alan Maguire continues our blog series on BPF, wherein he presented an...
Notes on BPF (7) - BPF, tc and Generic Segmentation Offload Oracle Linux kernel developer Alan Maguire continues our blog series on BPF, wherein he presented an in depth look at the kernel's "Berkeley Packet Filter" -- a useful and extensible kernel function for much more than packet filtering. In the previous BPF blog entry, I warned against enabling generic segmentation offload (GSO) when using tc-bpf. The purpose of this blog entry is to describe how it in fact can be...
Notes on BPF (7) - BPF, tc and Generic Segmentation Offload Oracle Linux kernel developer Alan Maguire continues our blog series on BPF, wherein he presented an in depth look at the kernel's "Berkeley...
In this blog post, Oracle Linux kernel developer William Roche presents a method to mirror a running system into a ramdisk. A RAM mirrored System ? There are...
In this blog post, Oracle Linux kernel developer William Roche presents a method to mirror a running system into a ramdisk. A RAM mirrored System ? There are cases where a system can boot correctly but after some time, can lose its system disk access - for example an iSCSI system disk configuration that has network issues, or any other disk driver problem. Once the system disk is no longer accessible, we rapidly face a hang situation followed by I/O failures, without the...
In this blog post, Oracle Linux kernel developer William Roche presents a method to mirror a running system into a ramdisk. A RAM mirrored System ? There are cases where a system can boot...
In this blog post, Oracle Linux kernel developer Jane Chu talks about persistent memory, the support we have in Oracle Linux for it and some examples on how to...
In this blog post, Oracle Linux kernel developer Jane Chu talks about persistent memory, the support we have in Oracle Linux for it and some examples on how to use it. Persistent Memory Introduction Persistent Memory Overview More than ever, applications have been driving hardware technologies. Big Data is responsible for recent advances in artificial intelligence which demand massive parallel processing capability and immediate access to large data. For example, realtime...
In this blog post, Oracle Linux kernel developer Jane Chu talks about persistent memory, the support we have in Oracle Linux for it and some examples on how to use it. Persistent Memory...
Scheduler Soft Affinity Oracle Linux kernel developer Subhra Mazumdar presents a new interface to the Linux scheduler he is proposing. Servers are getting...
Scheduler Soft Affinity Oracle Linux kernel developer Subhra Mazumdar presents a new interface to the Linux scheduler he is proposing. Servers are getting bigger and bigger with more CPU cores, memory and I/O. This trend has lead to workload consolidation (e.g multiple virtual machines (VMs) and containers running on the same physical host). Each VM or container can run a different instance of the same or different workload. Oracle Database has a similar virtualization...
Scheduler Soft Affinity Oracle Linux kernel developer Subhra Mazumdar presents a new interface to the Linux scheduler he is proposing. Servers are getting bigger and bigger with more CPU cores, memory...
Oracle is pleased to support the open source community as a Silver Sponsor of the Linux Foundation’s Linux Plumbers Conference (LPC). We look forward to meeting...
Oracle is pleased to support the open source community as a Silver Sponsor of the Linux Foundation’s Linux Plumbers Conference (LPC). We look forward to meeting with peers from around the world in Lisbon, Portugal, September 9 – 11 at the Corinthia Hotel. LPC is a developer conference for the open source community. It brings together the top developers working on the “plumbing” of Linux — kernel subsystems, core libraries, windowing systems, etc. LPC brings Linux and open...
Oracle is pleased to support the open source community as a Silver Sponsor of the Linux Foundation’s Linux Plumbers Conference (LPC). We look forward to meeting with peers from around the world...
Address Space Isolation In this blog post, Oracle Linux kernel developers Alexandre Chartre and Konrad Rzeszutek Wilk give an update on the Spectre v1 and L1TF...
Address Space Isolation In this blog post, Oracle Linux kernel developers Alexandre Chartre and Konrad Rzeszutek Wilk give an update on the Spectre v1 and L1TF software solutions. Introduction In August of 2018 the L1TF speculative execution side channel vulnerabilities were presented (see Foreshadow – Next Generation (NG). However the story is more complicated. In particular, an explanation in L1TF - L1 Terminal Fault mentions that if hyper-threading is enabled, and the host...
Address Space Isolation In this blog post, Oracle Linux kernel developers Alexandre Chartre and Konrad Rzeszutek Wilk give an update on the Spectre v1 and L1TF software solutions. Introduction In...
