The patch titled
Subject: maple_tree: calculate new_end when needed
has been added to the -mm mm-unstable branch. Its filename is
maple_tree-calculate-new_end-when-needed.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-calculate-new_end-when-needed.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: maple_tree: calculate new_end when needed
Date: Wed, 16 Oct 2024 00:22:20 +0000
Patch series "Following cleanup after introduce mas_wr_store_type()".
Here are two cleanups after introduction of mas_wr_store_type().
Patch 1 postpones new_end calculation when needed.
Patch 2 removes an unnecessary sanity check in mas_wr_slot_store().
This patch (of 2):
For wr_exact_fit/wr_new_root, we don't need to calculate new_end.
Let's postpone it until necessary.
Link: https://lkml.kernel.org/r/20241016002221.32428-1-richard.weiyang@xxxxxxxxx
Link: https://lkml.kernel.org/r/20241016002221.32428-2-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/maple_tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/maple_tree.c~maple_tree-calculate-new_end-when-needed
+++ a/lib/maple_tree.c
@@ -4202,13 +4202,13 @@ static inline enum store_type mas_wr_sto
if (!wr_mas->entry)
mas_wr_extend_null(wr_mas);
- new_end = mas_wr_new_end(wr_mas);
if ((wr_mas->r_min == mas->index) && (wr_mas->r_max == mas->last))
return wr_exact_fit;
if (unlikely(!mas->index && mas->last == ULONG_MAX))
return wr_new_root;
+ new_end = mas_wr_new_end(wr_mas);
/* Potential spanning rebalance collapsing a node */
if (new_end < mt_min_slots[wr_mas->type]) {
if (!mte_is_root(mas->node) && !(mas->mas_flags & MA_STATE_BULK))
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
maple_tree-i-is-always-less-than-or-equal-to-mas_end.patch
maple_tree-goto-complete-directly-on-a-pivot-of-0.patch
maple_tree-remove-maple_big_nodeparent.patch
maple_tree-memset-maple_big_node-as-a-whole.patch
maple_tree-root-node-could-be-handled-by-p_slot-too.patch
maple_tree-clear-request_count-for-new-allocated-one.patch
maple_tree-total-is-not-changed-for-nomem_one-case.patch
maple_tree-simplify-mas_push_node.patch
maple_tree-not-necessary-to-check-index-last-again.patch
maple_tree-one-single-entry-couldnt-represent-the-whole-range.patch
maple_tree-calculate-new_end-when-needed.patch
maple_tree-remove-sanity-check-from-mas_wr_slot_store.patch
