[XFS] Add a greedy allocation interface, allocating within a min/max size
range.
SGI-PV: 955302
SGI-Modid: xfs-linux-melb:xfs-kern:26803a
Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c
index f77fe5c..80b9340 100644
--- a/fs/xfs/linux-2.6/kmem.c
+++ b/fs/xfs/linux-2.6/kmem.c
@@ -68,6 +68,22 @@
return ptr;
}
+void *
+kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize,
+ unsigned int __nocast flags)
+{
+ void *ptr;
+
+ while (!(ptr = kmem_zalloc(maxsize, flags))) {
+ if ((maxsize >>= 1) <= minsize) {
+ maxsize = minsize;
+ flags = KM_SLEEP;
+ }
+ }
+ *size = maxsize;
+ return ptr;
+}
+
void
kmem_free(void *ptr, size_t size)
{
diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index 6d24274..9ebabdf 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -55,8 +55,9 @@
}
extern void *kmem_alloc(size_t, unsigned int __nocast);
-extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
extern void *kmem_zalloc(size_t, unsigned int __nocast);
+extern void *kmem_zalloc_greedy(size_t *, size_t, size_t, unsigned int __nocast);
+extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
extern void kmem_free(void *, size_t);
/*
diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index 3f86c7c..8b2c6cf 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -112,17 +112,16 @@
{
xfs_dqhash_t *udqhash, *gdqhash;
xfs_qm_t *xqm;
- uint i, hsize, flags = KM_SLEEP | KM_MAYFAIL | KM_LARGE;
+ uint i, hsize;
/*
* Initialize the dquot hash tables.
*/
- hsize = XFS_QM_HASHSIZE_HIGH;
- while (!(udqhash = kmem_zalloc(hsize * sizeof(*udqhash), flags))) {
- if ((hsize >>= 1) <= XFS_QM_HASHSIZE_LOW)
- flags = KM_SLEEP;
- }
- gdqhash = kmem_zalloc(hsize * sizeof(*gdqhash), KM_SLEEP | KM_LARGE);
+ udqhash = kmem_zalloc_greedy(&hsize,
+ XFS_QM_HASHSIZE_LOW, XFS_QM_HASHSIZE_HIGH,
+ KM_SLEEP | KM_MAYFAIL | KM_LARGE);
+ gdqhash = kmem_zalloc(hsize, KM_SLEEP | KM_LARGE);
+ hsize /= sizeof(xfs_dqhash_t);
ndquot = hsize << 8;
xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index 30eebc2..e304ab0 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -50,7 +50,7 @@
xfs_ihash_init(xfs_mount_t *mp)
{
__uint64_t icount;
- uint i, flags = KM_SLEEP | KM_MAYFAIL | KM_LARGE;
+ uint i;
if (!mp->m_ihsize) {
icount = mp->m_maxicount ? mp->m_maxicount :
@@ -61,14 +61,13 @@
(64 * NBPP) / sizeof(xfs_ihash_t));
}
- while (!(mp->m_ihash = (xfs_ihash_t *)kmem_zalloc(mp->m_ihsize *
- sizeof(xfs_ihash_t), flags))) {
- if ((mp->m_ihsize >>= 1) <= NBPP)
- flags = KM_SLEEP;
- }
- for (i = 0; i < mp->m_ihsize; i++) {
+ mp->m_ihash = kmem_zalloc_greedy(&mp->m_ihsize,
+ NBPC * sizeof(xfs_ihash_t),
+ mp->m_ihsize * sizeof(xfs_ihash_t),
+ KM_SLEEP | KM_MAYFAIL | KM_LARGE);
+ mp->m_ihsize /= sizeof(xfs_ihash_t);
+ for (i = 0; i < mp->m_ihsize; i++)
rwlock_init(&(mp->m_ihash[i].ih_lock));
- }
}
/*
@@ -77,7 +76,7 @@
void
xfs_ihash_free(xfs_mount_t *mp)
{
- kmem_free(mp->m_ihash, mp->m_ihsize*sizeof(xfs_ihash_t));
+ kmem_free(mp->m_ihash, mp->m_ihsize * sizeof(xfs_ihash_t));
mp->m_ihash = NULL;
}
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 6126899..0fbbd7b 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -326,7 +326,6 @@
int i; /* loop index */
int icount; /* count of inodes good in irbuf */
int irbsize; /* size of irec buffer in bytes */
- unsigned int kmflags; /* flags for allocating irec buffer */
xfs_ino_t ino; /* inode number (filesystem) */
xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
@@ -371,19 +370,8 @@
(XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
nimask = ~(nicluster - 1);
nbcluster = nicluster >> mp->m_sb.sb_inopblog;
- /*
- * Allocate a local buffer for inode cluster btree records.
- * This caps our maximum readahead window (so don't be stingy)
- * but we must handle the case where we can't get a contiguous
- * multi-page buffer, so we drop back toward pagesize; the end
- * case we ensure succeeds, via appropriate allocation flags.
- */
- irbsize = NBPP * 4;
- kmflags = KM_SLEEP | KM_MAYFAIL;
- while (!(irbuf = kmem_alloc(irbsize, kmflags))) {
- if ((irbsize >>= 1) <= NBPP)
- kmflags = KM_SLEEP;
- }
+ irbuf = kmem_zalloc_greedy(&irbsize, NBPC, NBPC * 4,
+ KM_SLEEP | KM_MAYFAIL | KM_LARGE);
nirbuf = irbsize / sizeof(*irbuf);
/*