Public bug reported: SRU Justification
Impact: Currently shiftfs does not handle O_DIRECT if the underlay supports it. This is blocking dqlite - an essential part of LXD - from profiting from the performance benefits of O_DIRECT on suitable filesystems when used with async io such as aio or io_uring. Regression Potential: Limited to shiftfs and virtually none since we have not supported this feature before. Test Case: Run LXD with dqlite on a kernel that has support for shiftfs with O_DIRECT. Target Kernels: All LTS kernels with shiftfs support. Patches: https://github.com/brauner/ubuntu-disco/tree/shiftfs_direct_io ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Christian Brauner (cbrauner) Status: Confirmed ** Changed in: linux (Ubuntu) Status: New => Confirmed ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Christian Brauner (cbrauner) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1837223 Title: shiftfs: add O_DIRECT support To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1837223/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
