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From: Wei Yang <richard.weiyang@gmail.com>
To: akpm@linux-foundation.org, Liam.Howlett@oracle.com
Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org,
	Wei Yang <richard.weiyang@gmail.com>,
	"Liam R . Howlett" <Liam.Howlett@Oracle.com>,
	Sidhartha Kumar <sidhartha.kumar@oracle.com>,
	Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: [PATCH 5/7] maple_tree: the type of left subtree is already saved in bnode->type
Date: Wed, 27 Nov 2024 01:27:51 +0000	[thread overview]
Message-ID: <20241127012753.3393-6-richard.weiyang@gmail.com> (raw)
In-Reply-To: <20241127012753.3393-1-richard.weiyang@gmail.com>

mast_sufficient()/mast_overflow() are only used in
mas_spanning_rebalance(). Before doing the check, mast_ascend() has
retrieved the left subtree type and stored in bnode->type.

So we can use the type in bnode->type directly to get minimum slot
count.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Liam R. Howlett <Liam.Howlett@Oracle.com>
CC: Sidhartha Kumar <sidhartha.kumar@oracle.com>
CC: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
---
 lib/maple_tree.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 6cabee1371ec..56e9857ce681 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -2729,7 +2729,7 @@ static inline void mast_combine_cp_right(struct maple_subtree_state *mast)
  */
 static inline bool mast_sufficient(struct maple_subtree_state *mast)
 {
-	if (mast->bn->b_end > mt_min_slot_count(mast->orig_l->node))
+	if (mast->bn->b_end > mt_min_slots[mast->bn->type])
 		return true;
 
 	return false;
@@ -2742,7 +2742,7 @@ static inline bool mast_sufficient(struct maple_subtree_state *mast)
  */
 static inline bool mast_overflow(struct maple_subtree_state *mast)
 {
-	if (mast->bn->b_end >= mt_slot_count(mast->orig_l->node))
+	if (mast->bn->b_end >= mt_slots[mast->bn->type])
 		return true;
 
 	return false;
-- 
2.34.1



  parent reply	other threads:[~2024-11-27  1:28 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-11-27  1:27 [PATCH 0/7] spanning write related cleanup Wei Yang
2024-11-27  1:27 ` [PATCH 1/7] maple_tree: not necessary to check ahead if !content Wei Yang
2024-11-27  1:27 ` [PATCH 2/7] maple_tree: validate we won't split on NULL Wei Yang
2024-11-27  1:27 ` [PATCH 3/7] maple_tree: check mid_split only may have Wei Yang
2024-11-27  1:27 ` [PATCH 4/7] maple_tree: the return value of mast_spanning_rebalance() is not used Wei Yang
2024-11-27  1:27 ` Wei Yang [this message]
2024-11-27  1:27 ` [PATCH 6/7] maple_tree: always need to update max of new left node Wei Yang
2024-11-27  1:27 ` [PATCH 7/7] maple_tree: only ascend left subtree to get the old node for replacement Wei Yang
2024-11-27 13:31 ` [PATCH 0/7] spanning write related cleanup Liam R. Howlett
2024-11-28  1:11   ` Wei Yang
2025-01-17  5:49   ` Wei Yang
2025-01-23 17:52     ` Liam R. Howlett
2025-01-24  1:43       ` Wei Yang
2025-01-27 14:36         ` Liam R. Howlett
2025-01-28  1:36           ` Wei Yang
2025-01-28  2:11           ` Wei Yang
2025-01-31 16:46           ` Wei Yang

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