The hunting saga started with a system failure in a ScyllaDB test suite, triggered by its usage of io-uring. We were initially puzzled by it, first blaming the concurrency level. But after going down the rabbit hole, we realized there was more to it. This talk will present the problem and share how tracing helped us discover a problem in the Linux kernel.
Raphael is an engineer working on the ScyllaDB storage layer for the past 7 years. Previously, he worked on bringing new file system support for the Syslinux project, which is a suite of bootloaders for starting up Linux. He’s passionate about OS development too, which led him to work on OSv, an operating system for virtualized environments, and make contributions to the Linux kernel as well.
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