Kernel Recipes 2025
Kernel Recipes is an amazing conference and it is unique in several different ways. First of all because it is community-oriented, and the environment is really open and friendly. And then because it has a single track – i.e. all the talks are in the same room – people don't need to choose which talks to attend: they'll attend all of them. Oh, and there was even a person (Anisse Astier) that was doing live blogging. How awesome is that?
(continue...)Making the filesystem-wide cache invalidation lightspeed in FUSE
One interesting aspect of FUSE user-space file systems is that caching can be
handled at the kernel level. For example, if an application reads data from a
file that happens to be on a FUSE file system, the kernel will keep that data in
the page cache so that later, if that data is requested again, it will be
readily available, without the need for the kernel to request it again to the
FUSE server. But the kernel also caches other file system data. For example,
it keeps track of metadata (file size, timestamps, etc) that may allow it to
also reply to a stat(2) system call without requesting it from user-space.
FUSE over io_uring
Over the past few months I had the chance to spend some time looking at an interesting new FUSE feature. This feature, merged into the Linux kernel 6.14 release, has introduced the ability to perform the communication between the user-space server (or FUSE server) and the kernel using io_uring. This means that file systems implemented in user-space will get a performance improvement simply by enabling this new feature.
(continue...)Initial post and introduction
Here it is, finally! After many years of using this camandro.org domain, I've
decided it was time to use it for something else other than email.