diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2021-09-01 11:15:53 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-10-22 16:40:56 -0700 |
| commit | 230372cfd627f2e9f11da2963693c8ebee3d6ba5 (patch) | |
| tree | 88f2dda3bbe10528534ae13ef0502e248653d6bd /fs/xfs/libxfs/xfs_trans_space.h | |
| parent | b23073c8965c9a39c9ee68278d9a1c0121865963 (diff) | |
xfs: compute the maximum height of the rmap btree when reflink enabled
Instead of assuming that the hardcoded XFS_BTREE_MAXLEVELS value is big
enough to handle the maximally tall rmap btree when all blocks are in
use and maximally shared, let's compute the maximum height assuming the
rmapbt consumes as many blocks as possible.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Chandan Babu R <chandan.babu@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_trans_space.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_trans_space.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h index 50332be34388..440c9c390b86 100644 --- a/fs/xfs/libxfs/xfs_trans_space.h +++ b/fs/xfs/libxfs/xfs_trans_space.h @@ -17,6 +17,13 @@ /* Adding one rmap could split every level up to the top of the tree. */ #define XFS_RMAPADD_SPACE_RES(mp) ((mp)->m_rmap_maxlevels) +/* + * Note that we historically set m_rmap_maxlevels to 9 when reflink was + * enabled, so we must preserve this behavior to avoid changing the transaction + * space reservations. + */ +#define XFS_OLD_REFLINK_RMAP_MAXLEVELS (9) + /* Blocks we might need to add "b" rmaps to a tree. */ #define XFS_NRMAPADD_SPACE_RES(mp, b)\ (((b + XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp) - 1) / \ |