On Tue, Jun 12, 2018 at 03:17:27PM -0700, Ilya Pronin wrote: > So the only way to remove a symlink from a project is to remove it? > > Here's my use case. In Apache Mesos we use XFS project quotas for disk > space isolation. Every container sandbox is allocated its own project > ID. When the container terminates its project ID is unset from the > sandbox and files inside it, and can be used for other containers. > Sandboxes of terminated containers stay on the host for some time for > debugging, etc. With such approach the inability to remove projid from > symlinks presents a small problem: when a project ID is reused for a > new container, any lingering symlinks that still have that project ID > will contribute to disk usage of the new container. Typically not > much, but still that's inaccurate. I guess we'll need to change when > we "deallocate" projids. XFS has a 32bit project ID space, so you really don't need to reuse project IDs at all. Just keep incrementing the new container ID, and maybe after a couple of billion project IDs have been consumed you can look at reclaiming/recycling/resetting the new ID counter? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
