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[XFS] Fix inode list allocation size in writeback. 

We only need to allocate space for the number of inodes in the cluster
when writing back inodes, not every byte in the inode cluster. This
reduces the amount of memory needing to be allocated to 256 bytes instead
of 64k.

SGI-PV: 981949
SGI-Modid: xfs-linux-melb:xfs-kern:31182a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
David Chinner 2008-05-20 11:30:15 +10:00 committed by Lachlan McIlroy
parent 49383b0e98
commit c8f5f12e46
1 changed files with 4 additions and 3 deletions
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7
fs/xfs/xfs_inode.c
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@ -2974,6 +2974,7 @@ xfs_iflush_cluster(
xfs_mount_t *mp = ip->i_mount;
xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino);
unsigned long first_index, mask;
unsigned long inodes_per_cluster;
int ilist_size;
xfs_inode_t **ilist;
xfs_inode_t *iq;
@ -2985,7 +2986,8 @@ xfs_iflush_cluster(
ASSERT(pag->pagi_inodeok);
ASSERT(pag->pag_ici_init);
ilist_size = XFS_INODE_CLUSTER_SIZE(mp) * sizeof(xfs_inode_t *);
inodes_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog;
ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *);
ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS);
if (!ilist)
return 0;
@ -2995,8 +2997,7 @@ xfs_iflush_cluster(
read_lock(&pag->pag_ici_lock);
/* really need a gang lookup range call here */
nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist,
first_index,
XFS_INODE_CLUSTER_SIZE(mp));
first_index, inodes_per_cluster);
if (nr_found == 0)
goto out_free;