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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-10-20 16:50:37 -1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-10-20 16:50:37 -1000 |
| commit | 7b9498b77066bd2a55f607e82a05b0888dde990a (patch) | |
| tree | 3685474b7678b4079ee882ea15b5d088a6fdb35f /Documentation/filesystems | |
| parent | 75663f575f34291007852859486cafc08dc10d0e (diff) | |
| parent | 1137aa577a35e2684e8046c3e53f920e79c7cc60 (diff) | |
Merge tag 'erofs-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
Pull erofs updates from Gao Xiang:
"The most notable change is to support superblock sharing for
composefs, thanks to Giuseppe again.
Another one switches to iomap for file-backed mounts on unencoded
inodes, which enables efficient sub-folio I/Os. The others are all
random ones.
Summary:
- Support superblock sharing for file-backed mounts
- Use iomap for file-backed mounts on unencoded inodes
- Minor fixes and cleanups"
* tag 'erofs-for-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
erofs: enable iomap for file-backed mounts on unencoded inodes
erofs: use on-disk blkszbits for lz4 max pcluster bound
mailmap: update entry for Gao Xiang
MAINTAINERS: erofs: update my email address
erofs: reuse superblock for file-backed mounts
MAINTAINERS: erofs: add dev branch to git tree entry
erofs: fix xattrs handling when metadata compression is used
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/erofs.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/filesystems/erofs.rst b/Documentation/filesystems/erofs.rst index d301d9ac946a..02caf3b061fe 100644 --- a/Documentation/filesystems/erofs.rst +++ b/Documentation/filesystems/erofs.rst @@ -139,6 +139,9 @@ inode_share Enable inode page sharing for this filesystem. Inodes wi page cache. source=%s (For file-backed mounts) Specify the backing image as a path or as an already-opened file descriptor. +superblock_share (For file-backed mounts) Share the superblock when the same + backing file is mounted more than once with compatible + options. Remount is not allowed on shared superblocks. =================== ========================================================= File-backed mounts @@ -156,6 +159,10 @@ Only regular files are accepted as backing files; to mount an image that resides on a block device, use the traditional block device mount path instead. +When superblock_share is specified, multiple mounts of the same backing +file at the same fsoffset with compatible mount options can share a single +superblock. Remount is not allowed on shared superblocks. + Sysfs Entries ============= |