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[XFS] use the inode radix tree for reclaiming inodes 

Use the reclaim tag to walk the radix tree and find the inodes under
reclaim. This was the only user of the deleted inode list.

SGI-PV: 988142

SGI-Modid: xfs-linux-melb:xfs-kern:32333a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
This commit is contained in:
David Chinner 2008-10-30 17:37:37 +11:00 committed by Lachlan McIlroy
parent 396beb8531
commit 7a3be02bae
1 changed files with 79 additions and 18 deletions
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97
fs/xfs/linux-2.6/xfs_sync.c
View File

@ -685,32 +685,93 @@ xfs_inode_clear_reclaim_tag(
xfs_put_perag(mp, pag);
}
STATIC void
xfs_reclaim_inodes_ag(
xfs_mount_t *mp,
int ag,
int noblock,
int mode)
{
xfs_inode_t *ip = NULL;
xfs_perag_t *pag = &mp->m_perag[ag];
int nr_found;
int first_index;
int skipped;
restart:
first_index = 0;
skipped = 0;
do {
/*
* use a gang lookup to find the next inode in the tree
* as the tree is sparse and a gang lookup walks to find
* the number of objects requested.
*/
read_lock(&pag->pag_ici_lock);
nr_found = radix_tree_gang_lookup_tag(&pag->pag_ici_root,
(void**)&ip, first_index, 1,
XFS_ICI_RECLAIM_TAG);
if (!nr_found) {
read_unlock(&pag->pag_ici_lock);
break;
}
/* update the index for the next lookup */
first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
ASSERT(xfs_iflags_test(ip, (XFS_IRECLAIMABLE|XFS_IRECLAIM)));
/* ignore if already under reclaim */
if (xfs_iflags_test(ip, XFS_IRECLAIM)) {
read_unlock(&pag->pag_ici_lock);
continue;
}
if (noblock) {
if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
read_unlock(&pag->pag_ici_lock);
continue;
}
if (xfs_ipincount(ip) ||
!xfs_iflock_nowait(ip)) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
read_unlock(&pag->pag_ici_lock);
continue;
}
}
read_unlock(&pag->pag_ici_lock);
/*
* hmmm - this is an inode already in reclaim. Do
* we even bother catching it here?
*/
if (xfs_reclaim_inode(ip, noblock, mode))
skipped++;
} while (nr_found);
if (skipped) {
delay(1);
goto restart;
}
return;
}
int
xfs_reclaim_inodes(
xfs_mount_t *mp,
int noblock,
int mode)
{
xfs_inode_t *ip, *n;
int i;
restart:
XFS_MOUNT_ILOCK(mp);
list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) {
if (noblock) {
if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0)
continue;
if (xfs_ipincount(ip) ||
!xfs_iflock_nowait(ip)) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
continue;
}
}
XFS_MOUNT_IUNLOCK(mp);
if (xfs_reclaim_inode(ip, noblock, mode))
delay(1);
goto restart;
for (i = 0; i < mp->m_sb.sb_agcount; i++) {
if (!mp->m_perag[i].pag_ici_init)
continue;
xfs_reclaim_inodes_ag(mp, i, noblock, mode);
}
XFS_MOUNT_IUNLOCK(mp);
return 0;
}