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xfs: embed the pagb_list array in the perag structure

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Now that the perag structure is allocated memory rather than held in
an array, we don't need to have the busy extent array external to
the structure. Embed it into the perag structure to avoid needing an
extra allocation when setting up.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Dave Chinner 2010-01-11 11:47:49 +00:00 committed by Alex Elder
parent 8b26c5825e
commit e57336ff7f
3 changed files with 5 additions and 12 deletions
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10
fs/xfs/xfs_ag.h
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@ -187,14 +187,8 @@ typedef struct xfs_perag_busy {
/*
* Per-ag incore structure, copies of information in agf and agi,
* to improve the performance of allocation group selection.
*
* pick sizes which fit in allocation buckets well
*/
#if (BITS_PER_LONG == 32)
#define XFS_PAGB_NUM_SLOTS 84
#elif (BITS_PER_LONG == 64)
#define XFS_PAGB_NUM_SLOTS 128
#endif
typedef struct xfs_perag {
struct xfs_mount *pag_mount; /* owner filesystem */
@ -212,8 +206,6 @@ typedef struct xfs_perag {
__uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
xfs_agino_t pagi_freecount; /* number of free inodes */
xfs_agino_t pagi_count; /* number of allocated inodes */
int pagb_count; /* pagb slots in use */
xfs_perag_busy_t *pagb_list; /* unstable blocks */
/*
* Inode allocation search lookup optimisation.
@ -232,6 +224,8 @@ typedef struct xfs_perag {
rwlock_t pag_ici_lock; /* incore inode lock */
struct radix_tree_root pag_ici_root; /* incore inode cache root */
#endif
int pagb_count; /* pagb slots in use */
xfs_perag_busy_t pagb_list[XFS_PAGB_NUM_SLOTS]; /* unstable blocks */
} xfs_perag_t;
/*

4
fs/xfs/xfs_alloc.c
View File

@ -2200,8 +2200,8 @@ xfs_alloc_read_agf(
pag->pagf_levels[XFS_BTNUM_CNTi] =
be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNTi]);
spin_lock_init(&pag->pagb_lock);
pag->pagb_list = kmem_zalloc(XFS_PAGB_NUM_SLOTS *
sizeof(xfs_perag_busy_t), KM_SLEEP);
pag->pagb_count = 0;
memset(pag->pagb_list, 0, sizeof(pag->pagb_list));
pag->pagf_init = 1;
}
#ifdef DEBUG

3
fs/xfs/xfs_mount.c
View File

@ -247,10 +247,9 @@ xfs_free_perag(
for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
spin_lock(&mp->m_perag_lock);
pag = radix_tree_delete(&mp->m_perag_tree, agno);
ASSERT(pag);
ASSERT(atomic_read(&pag->pag_ref) == 0);
spin_unlock(&mp->m_perag_lock);
ASSERT(pag);
kmem_free(pag->pagb_list);
kmem_free(pag);
}
}