Fixing the Filesystem Freeze API

Explore the challenges and proposed improvements to the Linux kernel's filesystem freeze functionality in this conference talk from the Linux Plumbers Conference. Delve into the serious problems identified in the current implementation, including the lack of a check API, issues with unmounting frozen filesystems, incompatibility with multi-device filesystems like BTRFS, and conflicts with DM snapshot. Learn how these limitations impact storage snapshot and backup solutions, particularly in virtualization environments. Discover the proposed new freeze API and other potential solutions to address these issues, enhancing the reliability and functionality of filesystem freezing in Linux systems.