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Explore a conference talk on extending user namespaces to allow host-isolated UID/GID usage in Linux systems. Delve into the ongoing discussion initiated by Stéphane Graber and Christian Brauner, as Aleksandr Mikhalitsyn and Stéphane Graber present new findings and address challenges with the Linux kernel community. Examine key topics such as the extension of kuid_t/kgid_t to 64-bit width and the VFS permission model for unmapped UID/GIDs. Gain insights into the potential improvements for user namespace allocation and isolation in Linux environments.
