[XFS] Add infrastructure for tracking I/O completions
SGI-PV: 934766
SGI-Modid: xfs-linux:xfs-kern:196856a
Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index d2c8a11..1a0bcbb 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -70,11 +70,14 @@
#include <linux/namei.h>
#include <linux/init.h>
#include <linux/mount.h>
+#include <linux/mempool.h>
#include <linux/writeback.h>
STATIC struct quotactl_ops linvfs_qops;
STATIC struct super_operations linvfs_sops;
-STATIC kmem_zone_t *linvfs_inode_zone;
+STATIC kmem_zone_t *xfs_vnode_zone;
+STATIC kmem_zone_t *xfs_ioend_zone;
+mempool_t *xfs_ioend_pool;
STATIC struct xfs_mount_args *
xfs_args_allocate(
@@ -281,8 +284,7 @@
{
vnode_t *vp;
- vp = (vnode_t *)kmem_cache_alloc(linvfs_inode_zone,
- kmem_flags_convert(KM_SLEEP));
+ vp = kmem_cache_alloc(xfs_vnode_zone, kmem_flags_convert(KM_SLEEP));
if (!vp)
return NULL;
return LINVFS_GET_IP(vp);
@@ -292,11 +294,11 @@
linvfs_destroy_inode(
struct inode *inode)
{
- kmem_cache_free(linvfs_inode_zone, LINVFS_GET_VP(inode));
+ kmem_zone_free(xfs_vnode_zone, LINVFS_GET_VP(inode));
}
STATIC void
-init_once(
+linvfs_inode_init_once(
void *data,
kmem_cache_t *cachep,
unsigned long flags)
@@ -309,21 +311,41 @@
}
STATIC int
-init_inodecache( void )
+linvfs_init_zones(void)
{
- linvfs_inode_zone = kmem_cache_create("linvfs_icache",
+ xfs_vnode_zone = kmem_cache_create("xfs_vnode",
sizeof(vnode_t), 0, SLAB_RECLAIM_ACCOUNT,
- init_once, NULL);
- if (linvfs_inode_zone == NULL)
- return -ENOMEM;
+ linvfs_inode_init_once, NULL);
+ if (!xfs_vnode_zone)
+ goto out;
+
+ xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
+ if (!xfs_ioend_zone)
+ goto out_destroy_vnode_zone;
+
+ xfs_ioend_pool = mempool_create(4 * MAX_BUF_PER_PAGE,
+ mempool_alloc_slab, mempool_free_slab,
+ xfs_ioend_zone);
+ if (!xfs_ioend_pool)
+ goto out_free_ioend_zone;
+
return 0;
+
+
+ out_free_ioend_zone:
+ kmem_zone_destroy(xfs_ioend_zone);
+ out_destroy_vnode_zone:
+ kmem_zone_destroy(xfs_vnode_zone);
+ out:
+ return -ENOMEM;
}
STATIC void
-destroy_inodecache( void )
+linvfs_destroy_zones(void)
{
- if (kmem_cache_destroy(linvfs_inode_zone))
- printk(KERN_WARNING "%s: cache still in use!\n", __FUNCTION__);
+ mempool_destroy(xfs_ioend_pool);
+ kmem_zone_destroy(xfs_vnode_zone);
+ kmem_zone_destroy(xfs_ioend_zone);
}
/*
@@ -873,9 +895,9 @@
ktrace_init(64);
- error = init_inodecache();
+ error = linvfs_init_zones();
if (error < 0)
- goto undo_inodecache;
+ goto undo_zones;
error = pagebuf_init();
if (error < 0)
@@ -896,9 +918,9 @@
pagebuf_terminate();
undo_pagebuf:
- destroy_inodecache();
+ linvfs_destroy_zones();
-undo_inodecache:
+undo_zones:
return error;
}
@@ -910,7 +932,7 @@
unregister_filesystem(&xfs_fs_type);
xfs_cleanup();
pagebuf_terminate();
- destroy_inodecache();
+ linvfs_destroy_zones();
ktrace_uninit();
}