xfs: create slab caches for frequently-used deferred items

Create slab caches for the high-level structures that coordinate
deferred intent items, since they're used fairly heavily.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Chandan Babu R <chandan.babu@oracle.com>

fs/xfs/libxfs/xfs_bmap.c

@@ -37,7 +37,7 @@
 #include "xfs_icache.h"
 #include "xfs_iomap.h"
 
-
+struct kmem_cache		*xfs_bmap_intent_cache;
 struct kmem_cache		*xfs_bmap_free_item_cache;
 
 /*
@@ -6190,7 +6190,7 @@ __xfs_bmap_add(
 			bmap->br_blockcount,
 			bmap->br_state);
 
-	bi = kmem_alloc(sizeof(struct xfs_bmap_intent), KM_NOFS);
+	bi = kmem_cache_alloc(xfs_bmap_intent_cache, GFP_NOFS | __GFP_NOFAIL);
 	INIT_LIST_HEAD(&bi->bi_list);
 	bi->bi_type = type;
 	bi->bi_owner = ip;
@@ -6301,3 +6301,20 @@ xfs_bmap_validate_extent(
 		return __this_address;
 	return NULL;
 }
+
+int __init
+xfs_bmap_intent_init_cache(void)
+{
+	xfs_bmap_intent_cache = kmem_cache_create("xfs_bmap_intent",
+			sizeof(struct xfs_bmap_intent),
+			0, 0, NULL);
+
+	return xfs_bmap_intent_cache != NULL ? 0 : -ENOMEM;
+}
+
+void
+xfs_bmap_intent_destroy_cache(void)
+{
+	kmem_cache_destroy(xfs_bmap_intent_cache);
+	xfs_bmap_intent_cache = NULL;
+}

fs/xfs/libxfs/xfs_bmap.h

@@ -290,4 +290,9 @@ int	xfs_bmapi_remap(struct xfs_trans *tp, struct xfs_inode *ip,
 		xfs_fileoff_t bno, xfs_filblks_t len, xfs_fsblock_t startblock,
 		int flags);
 
+extern struct kmem_cache	*xfs_bmap_intent_cache;
+
+int __init xfs_bmap_intent_init_cache(void);
+void xfs_bmap_intent_destroy_cache(void);
+
 #endif	/* __XFS_BMAP_H__ */

fs/xfs/libxfs/xfs_defer.c

@@ -18,6 +18,11 @@
 #include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_log.h"
+#include "xfs_rmap.h"
+#include "xfs_refcount.h"
+#include "xfs_bmap.h"
+
+static struct kmem_cache	*xfs_defer_pending_cache;
 
 /*
  * Deferred Operations in XFS
@@ -365,7 +370,7 @@ xfs_defer_cancel_list(
 			ops->cancel_item(pwi);
 		}
 		ASSERT(dfp->dfp_count == 0);
-		kmem_free(dfp);
+		kmem_cache_free(xfs_defer_pending_cache, dfp);
 	}
 }
 
@@ -462,7 +467,7 @@ xfs_defer_finish_one(
 
 	/* Done with the dfp, free it. */
 	list_del(&dfp->dfp_list);
-	kmem_free(dfp);
+	kmem_cache_free(xfs_defer_pending_cache, dfp);
 out:
 	if (ops->finish_cleanup)
 		ops->finish_cleanup(tp, state, error);
@@ -596,8 +601,8 @@ xfs_defer_add(
 			dfp = NULL;
 	}
 	if (!dfp) {
-		dfp = kmem_alloc(sizeof(struct xfs_defer_pending),
-				KM_NOFS);
+		dfp = kmem_cache_zalloc(xfs_defer_pending_cache,
+				GFP_NOFS | __GFP_NOFAIL);
 		dfp->dfp_type = type;
 		dfp->dfp_intent = NULL;
 		dfp->dfp_done = NULL;
@@ -809,3 +814,55 @@ xfs_defer_resources_rele(
 	dres->dr_bufs = 0;
 	dres->dr_ordered = 0;
 }
+
+static inline int __init
+xfs_defer_init_cache(void)
+{
+	xfs_defer_pending_cache = kmem_cache_create("xfs_defer_pending",
+			sizeof(struct xfs_defer_pending),
+			0, 0, NULL);
+
+	return xfs_defer_pending_cache != NULL ? 0 : -ENOMEM;
+}
+
+static inline void
+xfs_defer_destroy_cache(void)
+{
+	kmem_cache_destroy(xfs_defer_pending_cache);
+	xfs_defer_pending_cache = NULL;
+}
+
+/* Set up caches for deferred work items. */
+int __init
+xfs_defer_init_item_caches(void)
+{
+	int				error;
+
+	error = xfs_defer_init_cache();
+	if (error)
+		return error;
+	error = xfs_rmap_intent_init_cache();
+	if (error)
+		goto err;
+	error = xfs_refcount_intent_init_cache();
+	if (error)
+		goto err;
+	error = xfs_bmap_intent_init_cache();
+	if (error)
+		goto err;
+
+	return 0;
+err:
+	xfs_defer_destroy_item_caches();
+	return error;
+}
+
+/* Destroy all the deferred work item caches, if they've been allocated. */
+void
+xfs_defer_destroy_item_caches(void)
+{
+	xfs_bmap_intent_destroy_cache();
+	xfs_refcount_intent_destroy_cache();
+	xfs_rmap_intent_destroy_cache();
+	xfs_defer_destroy_cache();
+}

fs/xfs/libxfs/xfs_defer.h

@@ -122,4 +122,7 @@ void xfs_defer_ops_capture_free(struct xfs_mount *mp,
 		struct xfs_defer_capture *d);
 void xfs_defer_resources_rele(struct xfs_defer_resources *dres);
 
+int __init xfs_defer_init_item_caches(void);
+void xfs_defer_destroy_item_caches(void);
+
 #endif /* __XFS_DEFER_H__ */

fs/xfs/libxfs/xfs_refcount.c

@@ -24,6 +24,8 @@
 #include "xfs_rmap.h"
 #include "xfs_ag.h"
 
+struct kmem_cache	*xfs_refcount_intent_cache;
+
 /* Allowable refcount adjustment amounts. */
 enum xfs_refc_adjust_op {
 	XFS_REFCOUNT_ADJUST_INCREASE	= 1,
@@ -1235,8 +1237,8 @@ __xfs_refcount_add(
 			type, XFS_FSB_TO_AGBNO(tp->t_mountp, startblock),
 			blockcount);
 
-	ri = kmem_alloc(sizeof(struct xfs_refcount_intent),
-			KM_NOFS);
+	ri = kmem_cache_alloc(xfs_refcount_intent_cache,
+			GFP_NOFS | __GFP_NOFAIL);
 	INIT_LIST_HEAD(&ri->ri_list);
 	ri->ri_type = type;
 	ri->ri_startblock = startblock;
@@ -1782,3 +1784,20 @@ xfs_refcount_has_record(
 
 	return xfs_btree_has_record(cur, &low, &high, exists);
 }
+
+int __init
+xfs_refcount_intent_init_cache(void)
+{
+	xfs_refcount_intent_cache = kmem_cache_create("xfs_refc_intent",
+			sizeof(struct xfs_refcount_intent),
+			0, 0, NULL);
+
+	return xfs_refcount_intent_cache != NULL ? 0 : -ENOMEM;
+}
+
+void
+xfs_refcount_intent_destroy_cache(void)
+{
+	kmem_cache_destroy(xfs_refcount_intent_cache);
+	xfs_refcount_intent_cache = NULL;
+}

fs/xfs/libxfs/xfs_refcount.h

@@ -83,4 +83,9 @@ extern void xfs_refcount_btrec_to_irec(const union xfs_btree_rec *rec,
 extern int xfs_refcount_insert(struct xfs_btree_cur *cur,
 		struct xfs_refcount_irec *irec, int *stat);
 
+extern struct kmem_cache	*xfs_refcount_intent_cache;
+
+int __init xfs_refcount_intent_init_cache(void);
+void xfs_refcount_intent_destroy_cache(void);
+
 #endif	/* __XFS_REFCOUNT_H__ */

fs/xfs/libxfs/xfs_rmap.c

@@ -24,6 +24,8 @@
 #include "xfs_inode.h"
 #include "xfs_ag.h"
 
+struct kmem_cache	*xfs_rmap_intent_cache;
+
 /*
  * Lookup the first record less than or equal to [bno, len, owner, offset]
  * in the btree given by cur.
@@ -2485,7 +2487,7 @@ __xfs_rmap_add(
 			bmap->br_blockcount,
 			bmap->br_state);
 
-	ri = kmem_alloc(sizeof(struct xfs_rmap_intent), KM_NOFS);
+	ri = kmem_cache_alloc(xfs_rmap_intent_cache, GFP_NOFS | __GFP_NOFAIL);
 	INIT_LIST_HEAD(&ri->ri_list);
 	ri->ri_type = type;
 	ri->ri_owner = owner;
@@ -2779,3 +2781,20 @@ const struct xfs_owner_info XFS_RMAP_OINFO_REFC = {
 const struct xfs_owner_info XFS_RMAP_OINFO_COW = {
 	.oi_owner = XFS_RMAP_OWN_COW,
 };
+
+int __init
+xfs_rmap_intent_init_cache(void)
+{
+	xfs_rmap_intent_cache = kmem_cache_create("xfs_rmap_intent",
+			sizeof(struct xfs_rmap_intent),
+			0, 0, NULL);
+
+	return xfs_rmap_intent_cache != NULL ? 0 : -ENOMEM;
+}
+
+void
+xfs_rmap_intent_destroy_cache(void)
+{
+	kmem_cache_destroy(xfs_rmap_intent_cache);
+	xfs_rmap_intent_cache = NULL;
+}

fs/xfs/libxfs/xfs_rmap.h

@@ -215,4 +215,9 @@ extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES;
 extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC;
 extern const struct xfs_owner_info XFS_RMAP_OINFO_COW;
 
+extern struct kmem_cache	*xfs_rmap_intent_cache;
+
+int __init xfs_rmap_intent_init_cache(void);
+void xfs_rmap_intent_destroy_cache(void);
+
 #endif	/* __XFS_RMAP_H__ */

fs/xfs/xfs_bmap_item.c

@@ -384,7 +384,7 @@ xfs_bmap_update_finish_item(
 		bmap->bi_bmap.br_blockcount = count;
 		return -EAGAIN;
 	}
-	kmem_free(bmap);
+	kmem_cache_free(xfs_bmap_intent_cache, bmap);
 	return error;
 }
 
@@ -404,7 +404,7 @@ xfs_bmap_update_cancel_item(
 	struct xfs_bmap_intent		*bmap;
 
 	bmap = container_of(item, struct xfs_bmap_intent, bi_list);
-	kmem_free(bmap);
+	kmem_cache_free(xfs_bmap_intent_cache, bmap);
 }
 
 const struct xfs_defer_op_type xfs_bmap_update_defer_type = {

fs/xfs/xfs_refcount_item.c

@@ -384,7 +384,7 @@ xfs_refcount_update_finish_item(
 		refc->ri_blockcount = new_aglen;
 		return -EAGAIN;
 	}
-	kmem_free(refc);
+	kmem_cache_free(xfs_refcount_intent_cache, refc);
 	return error;
 }
 
@@ -404,7 +404,7 @@ xfs_refcount_update_cancel_item(
 	struct xfs_refcount_intent	*refc;
 
 	refc = container_of(item, struct xfs_refcount_intent, ri_list);
-	kmem_free(refc);
+	kmem_cache_free(xfs_refcount_intent_cache, refc);
 }
 
 const struct xfs_defer_op_type xfs_refcount_update_defer_type = {

fs/xfs/xfs_rmap_item.c

@@ -427,7 +427,7 @@ xfs_rmap_update_finish_item(
 			rmap->ri_bmap.br_startoff, rmap->ri_bmap.br_startblock,
 			rmap->ri_bmap.br_blockcount, rmap->ri_bmap.br_state,
 			state);
-	kmem_free(rmap);
+	kmem_cache_free(xfs_rmap_intent_cache, rmap);
 	return error;
 }
 
@@ -447,7 +447,7 @@ xfs_rmap_update_cancel_item(
 	struct xfs_rmap_intent		*rmap;
 
 	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
-	kmem_free(rmap);
+	kmem_cache_free(xfs_rmap_intent_cache, rmap);
 }
 
 const struct xfs_defer_op_type xfs_rmap_update_defer_type = {

fs/xfs/xfs_super.c

@@ -38,6 +38,7 @@
 #include "xfs_pwork.h"
 #include "xfs_ag.h"
 #include "xfs_btree.h"
+#include "xfs_defer.h"
 
 #include <linux/magic.h>
 #include <linux/fs_context.h>
@@ -1972,11 +1973,15 @@ xfs_init_caches(void)
 	if (error)
 		goto out_destroy_bmap_free_item_cache;
 
+	error = xfs_defer_init_item_caches();
+	if (error)
+		goto out_destroy_btree_cur_cache;
+
 	xfs_da_state_cache = kmem_cache_create("xfs_da_state",
 					      sizeof(struct xfs_da_state),
 					      0, 0, NULL);
 	if (!xfs_da_state_cache)
-		goto out_destroy_btree_cur_cache;
+		goto out_destroy_defer_item_cache;
 
 	xfs_ifork_cache = kmem_cache_create("xfs_ifork",
 					   sizeof(struct xfs_ifork),
@@ -2106,6 +2111,8 @@ xfs_init_caches(void)
 	kmem_cache_destroy(xfs_ifork_cache);
  out_destroy_da_state_cache:
 	kmem_cache_destroy(xfs_da_state_cache);
+ out_destroy_defer_item_cache:
+	xfs_defer_destroy_item_caches();
  out_destroy_btree_cur_cache:
 	xfs_btree_destroy_cur_caches();
  out_destroy_bmap_free_item_cache:
@@ -2139,6 +2146,7 @@ xfs_destroy_caches(void)
 	kmem_cache_destroy(xfs_trans_cache);
 	kmem_cache_destroy(xfs_ifork_cache);
 	kmem_cache_destroy(xfs_da_state_cache);
+	xfs_defer_destroy_item_caches();
 	xfs_btree_destroy_cur_caches();
 	kmem_cache_destroy(xfs_bmap_free_item_cache);
 	kmem_cache_destroy(xfs_log_ticket_cache);