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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-22 19:54:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-22 19:54:56 +0300
commitaab4ed5816acc0af8cce2680880419cd64982b1d (patch)
tree7c4ad6c123935aff7de234f366d5479f5de41005 /Documentation/filesystems
parent881b568756ae55ce7d87b9f001cbbe9d1289893e (diff)
parenta1108dcd9373a98f7018aa4310076260b8ecfc0b (diff)
downloadlinux-aab4ed5816acc0af8cce2680880419cd64982b1d.tar.xz
Merge tag 'erofs-for-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
Pull erofs updates from Gao Xiang: "In this cycle, we continue converting to use meta buffers for all remaining uncompressed paths to prepare for the upcoming subpage, folio and fscache features. We also fixed a double-free issue when sysfs initialization fails, which was reported by syzbot. Besides, in order for the userspace to control per-file timestamp easier, we now switch to record mtime instead of ctime with a compatible feature marked. And there are also some code cleanups and documentation update as usual. Summary: - Avoid using page structure directly for all uncompressed paths - Fix a double-free issue when sysfs initialization fails - Complete DAX description for erofs - Use mtime instead since there's no (easy) way for users to control ctime - Several code cleanups" * tag 'erofs-for-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs: erofs: rename ctime to mtime erofs: use meta buffers for inode lookup erofs: use meta buffers for reading directories fs: erofs: add sanity check for kobject in erofs_unregister_sysfs erofs: refine managed inode stuffs erofs: clean up z_erofs_extent_lookback erofs: silence warnings related to impossible m_plen Documentation/filesystem/dax: update DAX description on erofs erofs: clean up preload_compressed_pages() erofs: get rid of `struct z_erofs_collector' erofs: use meta buffers for erofs_read_superblock()
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/dax.rst6
-rw-r--r--Documentation/filesystems/erofs.rst2
2 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/filesystems/dax.rst b/Documentation/filesystems/dax.rst
index e3b30429d703..c04609d8ee24 100644
--- a/Documentation/filesystems/dax.rst
+++ b/Documentation/filesystems/dax.rst
@@ -23,11 +23,11 @@ on it as usual. The `DAX` code currently only supports files with a block
size equal to your kernel's `PAGE_SIZE`, so you may need to specify a block
size when creating the filesystem.
-Currently 4 filesystems support `DAX`: ext2, ext4, xfs and virtiofs.
+Currently 5 filesystems support `DAX`: ext2, ext4, xfs, virtiofs and erofs.
Enabling `DAX` on them is different.
-Enabling DAX on ext2
---------------------
+Enabling DAX on ext2 and erofs
+------------------------------
When mounting the filesystem, use the ``-o dax`` option on the command line or
add 'dax' to the options in ``/etc/fstab``. This works to enable `DAX` on all files
diff --git a/Documentation/filesystems/erofs.rst b/Documentation/filesystems/erofs.rst
index 7119aa213be7..bef6d3040ce4 100644
--- a/Documentation/filesystems/erofs.rst
+++ b/Documentation/filesystems/erofs.rst
@@ -40,7 +40,7 @@ Here is the main features of EROFS:
Inode metadata size 32 bytes 64 bytes
Max file size 4 GB 16 EB (also limited by max. vol size)
Max uids/gids 65536 4294967296
- File change time no yes (64 + 32-bit timestamp)
+ Per-inode timestamp no yes (64 + 32-bit timestamp)
Max hardlinks 65536 4294967296
Metadata reserved 4 bytes 14 bytes
===================== ============ =====================================