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release: v0.4.3 — btrfs Copy-on-Write fragmentation fix (#131)

frostbyte_neo 发布于 2026-05-06 06:53:45 +00:00 | 600 次提交在此版本后已推送到 main
The 0.4.x line's headline storage rework: per-user bind mount with
automatic NoCoW (chattr +C) so Windows VM disk image writes stop
forking new btrfs extents on every overwrite. On btrfs hosts pod
recreates that previously took many minutes (and frequently timed
out on the 300 s budget) finish in 30 s like they always did on
ext4. Reported by @xiyeming in #121, #122; the cachyos failure
cascade in #126 has the same root cause (install.bat dies mid-stage
during btrfs CoW file-op stalls; without rdprrap installed the
host's FreeRDP fallback hits multi-session reset).

Five PRs landing the fix end-to-end:
- PR #125 — bind mount + auto chattr +C + named-volume migration
  tool. Fresh installs default to ~/.local/share/winpodx/storage;
  existing users keep the named volume; winpodx setup --migrate-storage (or auto-trigger via winpodx migrate)
  moves it to the bind mount path without reinstalling Windows.
- PR #127 — compose-prefixed volume name resolution
  (winpodx_winpodx-data, not winpodx-data).
- PR #128 — chattr +C result inline print + post-rsync NoCoW
  verification (re-lsattr the dir AND a sample .img after rsync).
- PR #129 — refuse to re-migrate when bind-mount target is already
  populated; defends against install.sh-runs-twice destructive
  overwrite of the already-migrated NoCoW disk image.
- PR #130 — detect_path_fs walks up to existing ancestor before
  findmnt. THE actual root cause for "chattr never applies on fresh
  installs": findmnt --target on a non-existent path returns rc=1
  with empty stdout on openSUSE Tumbleweed (the docs lie), so
  detect_path_fs returned "unknown" → chattr_will_run False → entire
  chattr branch silent no-op. Walk-up makes plan_migration's pre-
  mkdir target probe resolve to the fs that will contain it.
Smoke-tested end-to-end on openSUSE Tumbleweed btrfs: clean wipe →
v0.4.2 fresh install → upgrade to main. install.sh prints
chattr +C applied to /home/.../winpodx/storage (NoCoW for new files) between Migrating storage... and OK: migrated 71 GiB.
Afterwards lsattr -d and lsattr data.img both show the C flag.
dockur's Warning: COW (copy on write) is not disabled for disk image file /storage/data.img no longer appears in the journal.

657 passed, 1 skipped, ruff check + format clean.
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release: v0.4.3 — btrfs Copy-on-Write fragmentation fix (#131)