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Explore the ongoing challenges and improvements needed for Linux's "new" mount API in this conference talk from the Linux Plumbers Conference. Delve into the usability issues that persist despite the significant flexibility improvements the mount API has brought to Linux over the past 7 years. Learn about specific problems affecting container runtimes, particularly the underutilized FSCONFIG_SET_PATH and FSCONFIG_SET_PATH_EMPTY features that could help prevent race attacks but currently have complex implementation requirements. Examine the recurring issues with singleton superblocks and the limitations of FSCONFIG_CMD_CREATE_EXCL in providing clear guidance to userspace applications. Discover additional pain points identified during the development of comprehensive man pages for the mount API, and participate in discussions about other challenges that need addressing to improve the overall developer and user experience with Linux's mount infrastructure.
