[XFS] Drop unneeded endian conversion in bulkstat and start readahead for
batches of inode cluster buffers at once, before any blocking reads are
issued.
SGI-PV: 944409
SGI-Modid: xfs-linux-melb:xfs-kern:26606a
Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 305a9d0..e6dbe6b 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -325,9 +325,9 @@
int i; /* loop index */
int icount; /* count of inodes good in irbuf */
xfs_ino_t ino; /* inode number (filesystem) */
- xfs_inobt_rec_t *irbp; /* current irec buffer pointer */
- xfs_inobt_rec_t *irbuf; /* start of irec buffer */
- xfs_inobt_rec_t *irbufend; /* end of good irec buffer entries */
+ xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
+ xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
+ xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
xfs_ino_t lastino=0; /* last inode number returned */
int nbcluster; /* # of blocks in a cluster */
int nicluster; /* # of inodes in a cluster */
@@ -398,7 +398,7 @@
* Allocate and initialize a btree cursor for ialloc btree.
*/
cur = xfs_btree_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_INO,
- (xfs_inode_t *)0, 0);
+ (xfs_inode_t *)0, 0);
irbp = irbuf;
irbufend = irbuf + nirbuf;
end_of_ag = 0;
@@ -435,9 +435,9 @@
gcnt++;
}
gfree |= XFS_INOBT_MASKN(0, chunkidx);
- irbp->ir_startino = cpu_to_be32(gino);
- irbp->ir_freecount = cpu_to_be32(gcnt);
- irbp->ir_free = cpu_to_be64(gfree);
+ irbp->ir_startino = gino;
+ irbp->ir_freecount = gcnt;
+ irbp->ir_free = gfree;
irbp++;
agino = gino + XFS_INODES_PER_CHUNK;
icount = XFS_INODES_PER_CHUNK - gcnt;
@@ -491,11 +491,27 @@
}
/*
* If this chunk has any allocated inodes, save it.
+ * Also start read-ahead now for this chunk.
*/
if (gcnt < XFS_INODES_PER_CHUNK) {
- irbp->ir_startino = cpu_to_be32(gino);
- irbp->ir_freecount = cpu_to_be32(gcnt);
- irbp->ir_free = cpu_to_be64(gfree);
+ /*
+ * Loop over all clusters in the next chunk.
+ * Do a readahead if there are any allocated
+ * inodes in that cluster.
+ */
+ for (agbno = XFS_AGINO_TO_AGBNO(mp, gino),
+ chunkidx = 0;
+ chunkidx < XFS_INODES_PER_CHUNK;
+ chunkidx += nicluster,
+ agbno += nbcluster) {
+ if (XFS_INOBT_MASKN(chunkidx,
+ nicluster) & ~gfree)
+ xfs_btree_reada_bufs(mp, agno,
+ agbno, nbcluster);
+ }
+ irbp->ir_startino = gino;
+ irbp->ir_freecount = gcnt;
+ irbp->ir_free = gfree;
irbp++;
icount += XFS_INODES_PER_CHUNK - gcnt;
}
@@ -519,33 +535,11 @@
for (irbp = irbuf;
irbp < irbufend && ubleft >= statstruct_size; irbp++) {
/*
- * Read-ahead the next chunk's worth of inodes.
- */
- if (&irbp[1] < irbufend) {
- /*
- * Loop over all clusters in the next chunk.
- * Do a readahead if there are any allocated
- * inodes in that cluster.
- */
- for (agbno = XFS_AGINO_TO_AGBNO(mp,
- be32_to_cpu(irbp[1].ir_startino)),
- chunkidx = 0;
- chunkidx < XFS_INODES_PER_CHUNK;
- chunkidx += nicluster,
- agbno += nbcluster) {
- if (XFS_INOBT_MASKN(chunkidx,
- nicluster) &
- ~(be64_to_cpu(irbp[1].ir_free)))
- xfs_btree_reada_bufs(mp, agno,
- agbno, nbcluster);
- }
- }
- /*
* Now process this chunk of inodes.
*/
- for (agino = be32_to_cpu(irbp->ir_startino), chunkidx = 0, clustidx = 0;
+ for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
ubleft > 0 &&
- be32_to_cpu(irbp->ir_freecount) < XFS_INODES_PER_CHUNK;
+ irbp->ir_freecount < XFS_INODES_PER_CHUNK;
chunkidx++, clustidx++, agino++) {
ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
/*
@@ -565,7 +559,7 @@
*/
if ((chunkidx & (nicluster - 1)) == 0) {
agbno = XFS_AGINO_TO_AGBNO(mp,
- be32_to_cpu(irbp->ir_startino)) +
+ irbp->ir_startino) +
((chunkidx & nimask) >>
mp->m_sb.sb_inopblog);
@@ -605,13 +599,13 @@
/*
* Skip if this inode is free.
*/
- if (XFS_INOBT_MASK(chunkidx) & be64_to_cpu(irbp->ir_free))
+ if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
continue;
/*
* Count used inodes as free so we can tell
* when the chunk is used up.
*/
- be32_add(&irbp->ir_freecount, 1);
+ irbp->ir_freecount++;
ino = XFS_AGINO_TO_INO(mp, agno, agino);
bno = XFS_AGB_TO_DADDR(mp, agno, agbno);
if (!xfs_bulkstat_use_dinode(mp, flags, bp,