Read-copy update (RCU) ensures that any update carried out prior to the
beginning of an RCU grace period will be observed by the entirety of any
RCU reader that extends beyond the end of that grace period. Waiting for
grace periods is the purpose of the synchronize_rcu() function, which
waits for all pre-existing readers in a throughput-optimized manner
with minimal impact on real-time...
Rust for Linux is the project adding support for the Rust language to the Linux kernel. This talk will give a high-level overview of the status and the latest news around Rust in the kernel since LPC 2023.
We will start with a summary of the new safe abstractions, modules and architectures that are in mainline or getting upstreamed soon. We will cover the...
Open-source software is increasingly reused, complicating the process of patching to repair bugs. In the case of Linux, a distinct ecosystem has formed, with Linux mainline serving as the upstream, stable or long-term-support (LTS) systems forked from mainline, and Linux distributions, such as Ubuntu and Android, as downstreams forked from stable or LTS systems for end-user use. Ideally, when...
Power fluctuations are a common challenge in embedded systems, where components like SD cards, eMMCs, and raw NAND flash are widely used for storage. These storage components are vulnerable to data corruption or even permanent damage when power unexpectedly drops. While larger systems, such as servers, often employ solutions like uninterruptible power supplies (UPS) to mitigate this risk, the...
There is a class of physical devices that contain several discrete modules in a single package but which are represented in the kernel as separate entities. An example of such devices is the Qualcomm WCN/QCA family of WLAN/Bluetooth adapter chipsets.
Typically the WLAN and Bluetooth modules will have their own device-tree nodes - one under the PCI bridge (WLAN) and one under the serial node...