This series is being spun off the block atomic writes for xfs series at [0]. That series got too big. The actual forcealign patches are roughly the same in this series. Why forcealign? In some scenarios to may be required to guarantee extent alignment and granularity. For example, for atomic writes, the maximum atomic write unit size would be limited at the extent alignment and granularity, guaranteeing that an atomic write would not span data present in multiple extents. forcealign may be useful as a performance tuning optimization in other scenarios. I decided not to support forcealign for RT devices here. Initially I thought that it would be quite simple of implement. However, I recently discovered through much testing and subsequent debug that this was not true, so I decided to defer support to later. Early development xfsprogs support is at: https://github.com/johnpgarry/xfsprogs-dev/commits/atomic-writes/ Differences to v2: - Add rounding to alloc unit helpers - Update xfs_setattr_size() - Disallow mount for forcealign and reflink - Remove forcealign and RT/reflink inode checks - Relocate setting of XFS_ALLOC_FORCEALIGN Differences to v1: - Add Darricks RB tags (thanks) - Disallow mount for forcealign and RT - Disallow cp --reflink from forcealign inode - Comments improvements (Darrick) - Coding style improvements (Darrick) - Fix xfs_inode_alloc_unitsize() (Darrick) Baseline: v6.11-rc1 [0] https://lore.kernel.org/linux-xfs/20240607143919.2622319-1-john.g.garry@xxxxxxxxxx/ [1] https://lore.kernel.org/linux-block/20240620125359.2684798-1-john.g.garry@xxxxxxxxxx/ Darrick J. Wong (2): xfs: Introduce FORCEALIGN inode flag xfs: Enable file data forcealign feature Dave Chinner (6): xfs: only allow minlen allocations when near ENOSPC xfs: always tail align maxlen allocations xfs: simplify extent allocation alignment xfs: make EOF allocation simpler xfs: introduce forced allocation alignment xfs: align args->minlen for forced allocation alignment John Garry (6): xfs: Update xfs_inode_alloc_unitsize() for forcealign xfs: Update xfs_setattr_size() for forcealign xfs: Do not free EOF blocks for forcealign xfs: Only free full extents for forcealign xfs: Unmap blocks according to forcealign xfs: Don't revert allocated offset for forcealign fs/xfs/libxfs/xfs_alloc.c | 33 ++-- fs/xfs/libxfs/xfs_alloc.h | 3 +- fs/xfs/libxfs/xfs_bmap.c | 322 ++++++++++++++++++--------------- fs/xfs/libxfs/xfs_format.h | 9 +- fs/xfs/libxfs/xfs_ialloc.c | 12 +- fs/xfs/libxfs/xfs_inode_buf.c | 46 +++++ fs/xfs/libxfs/xfs_inode_buf.h | 3 + fs/xfs/libxfs/xfs_inode_util.c | 14 ++ fs/xfs/libxfs/xfs_sb.c | 2 + fs/xfs/xfs_bmap_util.c | 14 +- fs/xfs/xfs_inode.c | 61 ++++++- fs/xfs/xfs_inode.h | 18 ++ fs/xfs/xfs_ioctl.c | 46 ++++- fs/xfs/xfs_iops.c | 4 +- fs/xfs/xfs_mount.h | 2 + fs/xfs/xfs_reflink.c | 5 +- fs/xfs/xfs_super.c | 18 ++ fs/xfs/xfs_trace.h | 8 +- include/uapi/linux/fs.h | 2 + 19 files changed, 431 insertions(+), 191 deletions(-) -- 2.31.1
