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xfs: precalculate cluster alignment in inodes and blocks

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Store the inode cluster alignment information in units of inodes and
blocks in the mount data so that we don't have to keep recalculating
them.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-12-12 08:46:25 -08:00
parent 83dcdb4469
commit c1b4a321ed
5 changed files with 11 additions and 8 deletions
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8
fs/xfs/libxfs/xfs_ialloc.c
View File

@ -690,7 +690,7 @@ xfs_ialloc_ag_alloc(
* but not to use them in the actual exact allocation.
*/
args.alignment = 1;
args.minalignslop = xfs_ialloc_cluster_alignment(args.mp) - 1;
args.minalignslop = args.mp->m_cluster_align - 1;
/* Allow space for the inode btree to split. */
args.minleft = args.mp->m_in_maxlevels - 1;
@ -725,7 +725,7 @@ xfs_ialloc_ag_alloc(
args.alignment = args.mp->m_dalign;
isaligned = 1;
} else
args.alignment = xfs_ialloc_cluster_alignment(args.mp);
args.alignment = args.mp->m_cluster_align;
/*
* Need to figure out where to allocate the inode blocks.
* Ideally they should be spaced out through the a.g.
@ -754,7 +754,7 @@ xfs_ialloc_ag_alloc(
args.type = XFS_ALLOCTYPE_NEAR_BNO;
args.agbno = be32_to_cpu(agi->agi_root);
args.fsbno = XFS_AGB_TO_FSB(args.mp, agno, args.agbno);
args.alignment = xfs_ialloc_cluster_alignment(args.mp);
args.alignment = args.mp->m_cluster_align;
if ((error = xfs_alloc_vextent(&args)))
return error;
}
@ -1017,7 +1017,7 @@ xfs_ialloc_ag_select(
*/
ineed = mp->m_ialloc_min_blks;
if (flags && ineed > 1)
ineed += xfs_ialloc_cluster_alignment(mp);
ineed += mp->m_cluster_align;
longest = pag->pagf_longest;
if (!longest)
longest = pag->pagf_flcount > 0;

5
fs/xfs/libxfs/xfs_types.c
View File

@ -87,15 +87,14 @@ xfs_agino_range(
* Calculate the first inode, which will be in the first
* cluster-aligned block after the AGFL.
*/
bno = round_up(XFS_AGFL_BLOCK(mp) + 1,
xfs_ialloc_cluster_alignment(mp));
bno = round_up(XFS_AGFL_BLOCK(mp) + 1, mp->m_cluster_align);
*first = XFS_AGB_TO_AGINO(mp, bno);
/*
* Calculate the last inode, which will be at the end of the
* last (aligned) cluster that can be allocated in the AG.
*/
bno = round_down(eoag, xfs_ialloc_cluster_alignment(mp));
bno = round_down(eoag, mp->m_cluster_align);
*last = XFS_AGB_TO_AGINO(mp, bno) - 1;
}

2
fs/xfs/scrub/ialloc.c
View File

@ -300,7 +300,7 @@ xchk_iallocbt_rec(
/* Make sure this record is aligned to cluster and inoalignmnt size. */
agbno = XFS_AGINO_TO_AGBNO(mp, irec.ir_startino);
if ((agbno & (xfs_ialloc_cluster_alignment(mp) - 1)) ||
if ((agbno & (mp->m_cluster_align - 1)) ||
(agbno & (mp->m_blocks_per_cluster - 1)))
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);

2
fs/xfs/xfs_mount.c
View File

@ -800,6 +800,8 @@ xfs_mountfs(
}
mp->m_blocks_per_cluster = xfs_icluster_size_fsb(mp);
mp->m_inodes_per_cluster = XFS_FSB_TO_INO(mp, mp->m_blocks_per_cluster);
mp->m_cluster_align = xfs_ialloc_cluster_alignment(mp);
mp->m_cluster_align_inodes = XFS_FSB_TO_INO(mp, mp->m_cluster_align);
/*
* If enabled, sparse inode chunk alignment is expected to match the

2
fs/xfs/xfs_mount.h
View File

@ -103,6 +103,8 @@ typedef struct xfs_mount {
uint m_inode_cluster_size;/* min inode buf size */
unsigned int m_inodes_per_cluster;
unsigned int m_blocks_per_cluster;
unsigned int m_cluster_align;
unsigned int m_cluster_align_inodes;
uint m_blockmask; /* sb_blocksize-1 */
uint m_blockwsize; /* sb_blocksize in words */
uint m_blockwmask; /* blockwsize-1 */