From: "Liam R. Howlett (Oracle)" <liam@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
maple-tree@lists.infradead.org,
"Liam R. Howlett (Oracle)" <liam@infradead.org>
Subject: [PATCH v2 08/19] maple_tree: Use prefetched value in mas_wr_store_type()
Date: Tue, 30 Jun 2026 15:08:32 -0400 [thread overview]
Message-ID: <20260630190843.3563858-9-liam@infradead.org> (raw)
In-Reply-To: <20260630190843.3563858-1-liam@infradead.org>
The slot contents exist in wr_mas->content, which has less overhead than
reading the slot again.
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
---
lib/maple_tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 3886b856d6e3a..8f5a7fa10cf4c 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -3279,7 +3279,7 @@ static inline void mas_wr_slot_store(struct ma_wr_state *wr_mas)
void __rcu **slots = wr_mas->slots;
bool gap = false;
- gap |= !mt_slot_locked(mas->tree, slots, offset);
+ gap |= !wr_mas->content;
gap |= !mt_slot_locked(mas->tree, slots, offset + 1);
if (wr_mas->offset_end - offset == 1) {
--
2.47.3
next prev parent reply other threads:[~2026-06-30 19:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-30 19:08 [PATCH v2 00/19] maple_tree: lock checking and clean ups Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 01/19] maple_tree: Add rcu locking check when LOCKDEP is enabled Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 02/19] locking/lockdep: Add sequence counter to held_lock Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 03/19] maple_tree: Add write lock checking with lockdep sequence numbers Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 04/19] maple_tree: Documentation fix Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 05/19] maple_tree: Drop dead code from mas_extend_spanning_null() Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 06/19] maple_tree: Drop MAPLE_ALLOC_SLOTS Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 07/19] maple_tree: Clarify comments on mas_nomem() Liam R. Howlett (Oracle)
2026-06-30 19:08 ` Liam R. Howlett (Oracle) [this message]
2026-06-30 19:08 ` [PATCH v2 09/19] maple_tree: Optimise mas_wr_node_store() when not in rcu mode Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 10/19] maple_tree: micro optimisation of mas_wr_store_type() Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 11/19] maple_tree: Add bulk parent set helper Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 12/19] maple_tree: Catch race in mas_alloc_cyclic() Liam R. Howlett (Oracle)
2026-06-30 19:41 ` Chuck Lever
2026-06-30 19:08 ` [PATCH v2 13/19] maple_tree: Document that erase may use GFP_KERNEL for allocations Liam R. Howlett (Oracle)
2026-06-30 19:32 ` Rik van Riel
2026-06-30 19:08 ` [PATCH v2 14/19] maple_tree: WARN_ON_ONCE when allocations fail Liam R. Howlett (Oracle)
2026-06-30 23:02 ` Andrew Morton
2026-06-30 19:08 ` [PATCH v2 15/19] maple_tree: Document erase and allocations better Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 16/19] maple_tree: Change two GFP flags in tests Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 17/19] maple_tree: Fix argument name in header Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 18/19] maple_tree: Avoid extra gap calculation Liam R. Howlett (Oracle)
2026-06-30 19:08 ` [PATCH v2 19/19] maple_tree: Add helper mas_make_walkable() Liam R. Howlett (Oracle)
2026-06-30 23:05 ` [PATCH v2 00/19] maple_tree: lock checking and clean ups Andrew Morton
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