Make memory erasure feature compatible with overlayfs
Originally created by @intrigeri on #15146 (Redmine)
The “Erasure of the overlayfs read-write branch on shutdown” test
scenario fails. But interestingly, “Tails erases memory on DVD boot
medium removal: overlayfs read-write branch” passes. Looks like
live-boot behaves slightly differently on overlayfs than on aufs,
which seems to explain why mountpoints are not visible and can’t be
unmounted and thus cleaned.
We need to update the design
doc
(wiki/src/contribute/design/memory_erasure.mdwn) to document the
overlayfs implementation instead of the aufs one.
Feature Branch: bugfix/15146-overlayfs-memory-erasure+force-all-tests
Attachments
- aufs.png
- overlayfs.png
- exposed-upper-dir-log-2.png
- exposed-upper-dir-log-1.png
- exposed-upper-dir-log-3.png
- exposed-upper-dir-log-4.png
- exposed-upper-dir-log-5.png
- exposed-upper-dir-log-6.png
- 02_10_33_Tails_erases_memory_on_DVD_boot_medium_removal__overlayfs_read-write_branch.png
- 02_10_33_Tails_erases_memory_on_DVD_boot_medium_removal__overlayfs_read-write_branch.mkv
- 00_21_12_Tails_erases_memory_on_DVD_boot_medium_removal__overlayfs_read-write_branch.png
- 00_21_12_Tails_erases_memory_on_DVD_boot_medium_removal__overlayfs_read-write_branch.mkv
- 03_25_07_Tails_erases_memory_on_DVD_boot_medium_removal__overlayfs_read-write_branch.png
- 03_25_07_Tails_erases_memory_on_DVD_boot_medium_removal__overlayfs_read-write_branch.mkv
- with-util-linux-mount-umount.png
Related issues
- Related to #8415 (closed)