Linux 6.9-rc1 provides a glimpse into the future of the open source kernel
Linus Torvalds has officially announced the release of Linux 6.9-rc1, marking the end of the merge window for this version. As usual, the update brings a ton of changes, with a significant portion attributed to AMD GPU header files. But let's not get bogged down by the sheer volume of these updates; the real excitement lies in the core improvements that promise to enhance the kernel's performance.
Two major updates steal the spotlight in this release: the timer subsystem and the workqueue subsystem. The timer subsystem has undergone a substantial rewrite, introducing per-CPU timer wheels. This enhancement is poised to boost the performance of timers, which is especially crucial for networking operations. On the other hand, the workqueue subsystem now supports BH workqueue support, providing a much-needed alternative to the long-deprecated tasklet interface.