ext4 file system · Maintained

Maintainers

• M "Theodore Ts'o" <tytso@mit.edu>
• R Andreas Dilger <adilger.kernel@dilger.ca>
• R Baokun Li <libaokun@linux.alibaba.com>
• R Jan Kara <jack@suse.cz>
• R Ojaswin Mujoo <ojaswin@linux.ibm.com>
• R Ritesh Harjani <ritesh.list@gmail.com>
• R Zhang Yi <yi.zhang@huawei.com>

Paths

• F Documentation/filesystems/ext4/
• F fs/ext4/
• F include/trace/events/ext4.h
• F include/uapi/linux/ext4.h

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH 00/11] Convert barrier pairs to acquire/release for better performance
  2026-08-25 09:54 · 1 reply in 7d · Jinjie Ruan <hidden>
• HOTtoday [PATCH] ext4: skip extra isize expansion while unmounting
  2026-08-24 09:45 · 0 replies in 7d · Hemanth Selam <hidden>
• WARM2d [PATCH] Add EXT4_STATE_MAY_INLINE_DATA check in ext4_readdir
  2026-08-22 16:30 · 2 replies in 7d · pipishuo <hidden>
• COOLING4d [PATCH] ext4: validate extent root during fast commit replay
  2026-08-21 10:07 · 0 replies in 7d · Jérémy Jean <hidden>
• COOLING4d [PATCH RESEND] ext4: Avoid entering writeback paths during fastcommit replay
  2026-08-20 11:25 · 0 replies in 7d · Jan Kara <jack@suse.cz>
• COOLING5d [PATCH] ext4: fix discard work use-after-free on failed mount
  2026-08-20 05:22 · 0 replies in 7d · Fan Wu <hidden>

Active reviewers (last 30 days)

• Andreas Dilger <hidden>
  59 attestations (59 Reviewed-by) · last on 2026-08-01
• Jan Kara <jack@suse.cz>
  23 attestations (2 Acked-by, 1 Reported-by, 13 Reviewed-by, 7 Suggested-by) · last on 2026-08-14
• Ojaswin Mujoo <ojaswin@linux.ibm.com>
  15 attestations (4 Reported-by, 10 Reviewed-by, 1 Suggested-by) · last on 2026-08-20
• <hidden>
  7 attestations (7 Reported-by) · last on 2026-08-01
• Eric Biggers <ebiggers@kernel.org>
  6 attestations (6 Acked-by) · last on 2026-08-14
• Darrick J. Wong <djwong@kernel.org>
  6 attestations (6 Reviewed-by) · last on 2026-08-14
• Christoph Hellwig <hch@lst.de>
  5 attestations (5 Reviewed-by) · last on 2026-08-14
• Andreas Dilger <hidden>
  4 attestations (4 Reviewed-by) · last on 2026-07-31
• Weidong Zhu <hidden>
  3 attestations (3 Acked-by) · last on 2026-08-06
• Venkat Rao Bagalkote <hidden>
  2 attestations (2 Reported-by) · last on 2026-08-20

Recent patches

Most-recent 30 patches in this subsystem on linux-ext4 (capped at 30), ordered by date desc.

• HOTtoday [PATCH 07/11] ext4: Convert group-count barrier protocol to acquire/release
  2026-08-25 · Jinjie Ruan <hidden>
• HOTtoday [PATCH] ext4: skip extra isize expansion while unmounting
  2026-08-24 · Hemanth Selam <hidden>
• WARM2d [PATCH V3] Add EXT4_STATE_MAY_INLINE_DATA check in ext4_readdir
  2026-08-22 · shuo chen <hidden>
• WARM2d [PATCH] Add EXT4_STATE_MAY_INLINE_DATA check in ext4_readdir
  2026-08-22 · shuo chen <hidden>
• COOLING4d [PATCH] ext4: validate extent root during fast commit replay
  2026-08-21 · Jérémy Jean <hidden>
• COOLING4d [PATCH RESEND] ext4: Avoid entering writeback paths during fastcommit replay
  2026-08-20 · Jan Kara <jack@suse.cz>
• COOLING5d [PATCH] ext4: fix discard work use-after-free on failed mount
  2026-08-20 · Fan Wu <hidden>
• COOLING7d [PATCH] ext4: compensate ea_inode refs and free block on new xattr block write error
  2026-08-17 · Matthias Goergens <hidden>
• WARM2d [PATCH v2] Add EXT4_STATE_MAY_INLINE_DATA check in ext4_readdir
  2026-08-16 · shuo chen <hidden>
• WARM3d [PATCH -next v5 32/32] ext4: introduce a mount option for iomap buffered I/O path
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 31/32] ext4: partially enable iomap for the buffered I/O path of regular files
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 28/32] ext4: set DISKSIZE_GROW_PENDING after zeroing unaligned EOF block
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 25/32] ext4: defer i_disksize update while DISKSIZE_GROW_PENDING is set
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 29/32] ext4: add tracepoints for DISKSIZE_GROW_PENDING set, clear, and wait
  2026-08-14 · Zhang Yi <hidden>
• WARM3d REVIEWED: 10 (10M) [PATCH -next v5 21/32] ext4: disable online defrag when inode using iomap buffered I/O path
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 22/32] ext4: add EXT4_STATE_DISKSIZE_GROW_PENDING state bit and helpers
  2026-08-14 · Zhang Yi <hidden>
• WARM3d REVIEWED: 10 (10M) [PATCH -next v5 17/32] ext4: implement mmap path using iomap
  2026-08-14 · Zhang Yi <hidden>
• WARM3d REVIEWED: 10 (10M) [PATCH -next v5 13/32] ext4: pass out extent seq counter when mapping da blocks
  2026-08-14 · Zhang Yi <hidden>
• WARM3d REVIEWED: 10 (10M) [PATCH -next v5 20/32] ext4: add block mapping tracepoints for iomap buffered I/O path
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 16/32] ext4: implement writeback path using iomap
  2026-08-14 · Zhang Yi <hidden>
• WARM3d REVIEWED: 9 (9M) [PATCH -next v5 14/32] ext4: do not use data=ordered mode for inodes using buffered iomap path
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 10/32] ext4: skip block allocation for holes in the data submission path
  2026-08-14 · Zhang Yi <hidden>
• WARM3d REVIEWED: 10 (10M) [PATCH -next v5 12/32] ext4: implement buffered read path using iomap
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 08/32] ext4: allow ext4_map_blocks() to start its own transaction handle
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 30/32] ext4: add tracepoints for EOF block zeroing and disksize-grow I/O
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 23/32] ext4: submit and wait for pending disksize-grow I/O on writeback
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 26/32] ext4: submit and wait for disksize-grow I/O in fallocate paths
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 18/32] ext4: implement partial block zero range path using iomap
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 27/32] ext4: clear DISKSIZE_GROW_PENDING on truncate or error
  2026-08-14 · Zhang Yi <hidden>
• WARM3d [PATCH -next v5 19/32] ext4: tolerate unexpected holes in ext4_convert_unwritten_extents()
  2026-08-14 · Zhang Yi <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE160d REVIEWED: 11 (10M) [PATCH AUTOSEL 6.19-6.12] ext4: use reserved metadata blocks when splitting extent on endio
  2026-02-14 · Sasha Levin <sashal@kernel.org> · 3 Reviewed-by
• STALE160d REVIEWED: 10 (10M) [PATCH AUTOSEL 6.19-6.6] ext4: move ext4_percpu_param_init() before ext4_mb_init()
  2026-02-14 · Sasha Levin <sashal@kernel.org> · 2 Reviewed-by
• STALE160d REVIEWED: 10 (10M) [PATCH AUTOSEL 6.19-6.12] ext4: propagate flags to convert_initialized_extent()
  2026-02-14 · Sasha Levin <sashal@kernel.org> · 2 Reviewed-by
• STALE148d REVIEWED: 1 (0M) [PATCH] ext4: add bounds check in ext4_xattr_ibody_get() to prevent out-of-bounds access
  2026-02-24 · Deepanshu Kartikey <hidden> · 1 Tested-by
• STALE137d REVIEWED: 1 (0M) [PATCH v4] ext4: simplify mballoc preallocation size rounding for small files
  2026-02-25 · Weixie Cui <hidden> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 2 (1M) FAILED: Patch "ext4: don't set EXT4_GET_BLOCKS_CONVERT when splitting before submitting I/O" failed to apply to 6.18-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 2 Reviewed-by
• DORMANTno replies REVIEWED: 2 (1M) FAILED: Patch "ext4: don't zero the entire extent if EXT4_EXT_DATA_PARTIAL_VALID1" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 2 Reviewed-by
• DORMANTno replies REVIEWED: 2 (1M) FAILED: Patch "ext4: subdivide EXT4_EXT_DATA_VALID1" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 2 Reviewed-by
• DORMANTno replies REVIEWED: 2 (1M) FAILED: Patch "ext4: drop extent cache after doing PARTIAL_VALID1 zeroout" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 2 Reviewed-by
• DORMANTno replies REVIEWED: 2 (1M) FAILED: Patch "ext4: drop extent cache when splitting extent fails" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org> · 2 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE188d LANDED [PATCH 04/11] fsverity: kick off hash readahead at data I/O submission time
  2026-02-02 · Christoph Hellwig <hch@lst.de>
• STALE195d [PATCH -next v2 04/22] ext4: factor out journalled block zeroing range
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 01/22] ext4: make ext4_block_zero_page_range() pass out did_zero
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 06/22] ext4: don't zero partial block under an active handle when truncating down
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 02/22] ext4: make ext4_block_truncate_page() return zeroed length
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 11/22] ext4: pass out extent seq counter when mapping da blocks
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 07/22] ext4: move ext4_block_zero_page_range() out of an active handle
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 05/22] ext4: stop passing handle to ext4_journalled_block_zero_range()
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 08/22] ext4: zero post EOF partial block before appending write
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE195d [PATCH -next v2 09/22] ext4: add a new iomap aops for regular file's buffered IO path
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>