[Bug 1879196] Re: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches
The Eoan Ermine has reached end of life, so this bug will not be fixed for that release ** Changed in: linux (Ubuntu Eoan) Status: Triaged => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879196 Title: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879196/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879196] Re: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches
James, can you try this kernel, please: https://drive.google.com/open?id =19iTwaFSYNS95_I-gD_rvFoV9cMAfy6io -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879196 Title: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879196/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879196] Re: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches
** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Eoan) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Eoan) Status: New => Triaged ** Changed in: linux (Ubuntu Eoan) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Focal) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Focal) Status: New => Triaged ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879196 Title: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879196/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879196] Re: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches
I have a fix for this note, that this is a regression we introduced by another fix. I also want to put this cautious note here so people better understand why shiftfs has such bugs and why they are not simple idiot regressions but rather intricate to fix: Note, in general it's not advisable to directly modify the underlay while a shiftfs mount is on top. In some way this means we need to keep two caches in sync and it's hard enough to keep a single cache happy. But shiftfs' use-case is inherently prone to be used for exactly that. So this is something we have to navigate carefully and honestly we have no full model upstream that does the same. Overlayfs has the copy-up behavior which let's it get around most of the issues but we don't have it and ecryptfs is broken in such scenarios which we verified quite a while back. In any case, I built a kernel with this patch and re-ran all regressions that are related to this that we have so far (cf. [1], [2], and [3]). None of them were reproducible with this patch here. So we still fix the ESTALE issue but also keep underlay and overlay in sync. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879196 Title: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879196/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879196] Re: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches
** Changed in: linux (Ubuntu) Status: Incomplete => In Progress ** 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/1879196 Title: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879196/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1879196] Re: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches
The good news (?) is that this seems easy to reproduce; editing any file in emacs seems to do the trick: https://pastebin.ubuntu.com/p/XydrSqfkfX/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1879196 Title: 'shifted' (shiftfs) FS mount became inconsistent with host FS; resolved by dropping caches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1879196/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
