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| author | Darrick J. Wong <djwong@kernel.org> | 2023-10-16 09:40:11 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2023-10-17 16:26:25 -0700 |
| commit | ef5a83b7e597038d1c734ddb4bc00638082c2bf1 (patch) | |
| tree | 9b5aa12266f11b3748c81079e004f6d5ecfc4640 /fs/xfs/xfs_mount.h | |
| parent | 5f57f7309d9ab9d24d50c5707472b1ed8af4eabc (diff) | |
| download | lwn-ef5a83b7e597038d1c734ddb4bc00638082c2bf1.tar.gz lwn-ef5a83b7e597038d1c734ddb4bc00638082c2bf1.zip | |
xfs: use shifting and masking when converting rt extents, if possible
Avoid the costs of integer division (32-bit and 64-bit) if the realtime
extent size is a power of two.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_mount.h')
| -rw-r--r-- | fs/xfs/xfs_mount.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index d19cca099bc3..d8769dc5f6dd 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -119,6 +119,7 @@ typedef struct xfs_mount { uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ uint8_t m_agno_log; /* log #ag's */ uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ + int8_t m_rtxblklog; /* log2 of rextsize, if possible */ uint m_blockmask; /* sb_blocksize-1 */ uint m_blockwsize; /* sb_blocksize in words */ uint m_blockwmask; /* blockwsize-1 */ @@ -152,6 +153,7 @@ typedef struct xfs_mount { uint64_t m_features; /* active filesystem features */ uint64_t m_low_space[XFS_LOWSP_MAX]; uint64_t m_low_rtexts[XFS_LOWSP_MAX]; + uint64_t m_rtxblkmask; /* rt extent block mask */ struct xfs_ino_geometry m_ino_geo; /* inode geometry */ struct xfs_trans_resv m_resv; /* precomputed res values */ /* low free space thresholds */ |