The patch titled
Subject: maple_tree: avoid ascending when mas->min is also the parent's minimum
has been added to the -mm mm-unstable branch. Its filename is
maple_tree-avoid-ascending-when-mas-min-is-also-the-parents-minimum.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-avoid-ascending-when-mas-min-is-also-the-parents-minimum.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Peng Zhang <zhangpeng.00@xxxxxxxxxxxxx>
Subject: maple_tree: avoid ascending when mas->min is also the parent's minimum
Date: Mon, 20 Nov 2023 15:09:34 +0800
When the child node is the first child of its parent node, mas->min does
not need to be updated. This can reduce the number of ascending times
in some cases.
Link: https://lkml.kernel.org/r/20231120070937.35481-3-zhangpeng.00@xxxxxxxxxxxxx
Signed-off-by: Peng Zhang <zhangpeng.00@xxxxxxxxxxxxx>
Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/maple_tree.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/lib/maple_tree.c~maple_tree-avoid-ascending-when-mas-min-is-also-the-parents-minimum
+++ a/lib/maple_tree.c
@@ -1088,14 +1088,16 @@ static int mas_ascend(struct ma_state *m
return 0;
}
- if (!mas->min)
+ min = 0;
+ max = ULONG_MAX;
+ if (!mas->offset) {
+ min = mas->min;
set_min = true;
+ }
if (mas->max == ULONG_MAX)
set_max = true;
- min = 0;
- max = ULONG_MAX;
do {
p_enode = a_enode;
a_type = mas_parent_type(mas, p_enode);
_
Patches currently in -mm which might be from zhangpeng.00@xxxxxxxxxxxxx are
maple_tree-add-mt_free_one-and-mt_attr-helpers.patch
maple_tree-introduce-mtreemas_lock_nested.patch
maple_tree-introduce-interfaces-__mt_dup-and-mtree_dup.patch
radix-tree-test-suite-align-kmem_cache_alloc_bulk-with-kernel-behavior.patch
maple_tree-add-test-for-mtree_dup.patch
maple_tree-update-the-documentation-of-maple-tree.patch
maple_tree-skip-other-tests-when-bench-is-enabled.patch
maple_tree-update-check_forking-and-bench_forking.patch
maple_tree-preserve-the-tree-attributes-when-destroying-maple-tree.patch
fork-use-__mt_dup-to-duplicate-maple-tree-in-dup_mmap.patch
maple_tree-move-the-check-forward-to-avoid-static-check-warning.patch
maple_tree-avoid-ascending-when-mas-min-is-also-the-parents-minimum.patch
maple_tree-remove-an-unused-parameter-for-ma_meta_end.patch
maple_tree-delete-one-of-the-two-identical-checks.patch
maple_tree-simplify-mas_leaf_set_meta.patch
