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xfs: precalculate inodes and blocks per inode cluster

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Store the number of inodes and blocks per inode cluster 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 43004b2a8d
commit 83dcdb4469
7 changed files with 34 additions and 43 deletions
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14
fs/xfs/xfs_itable.c
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@@ -167,20 +167,18 @@ xfs_bulkstat_ichunk_ra(
{
xfs_agblock_t agbno;
struct blk_plug plug;
int blks_per_cluster;
int inodes_per_cluster;
int i; /* inode chunk index */
agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
blks_per_cluster = xfs_icluster_size_fsb(mp);
inodes_per_cluster = XFS_FSB_TO_INO(mp, blks_per_cluster);
blk_start_plug(&plug);
for (i = 0; i < XFS_INODES_PER_CHUNK;
i += inodes_per_cluster, agbno += blks_per_cluster) {
if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
&xfs_inode_buf_ops);
i += mp->m_inodes_per_cluster, agbno += mp->m_blocks_per_cluster) {
if (xfs_inobt_maskn(i, mp->m_inodes_per_cluster) &
~irec->ir_free) {
xfs_btree_reada_bufs(mp, agno, agbno,
mp->m_blocks_per_cluster,
&xfs_inode_buf_ops);
}
}
blk_finish_plug(&plug);