+ maple_tree-convert-mas_insert-to-preallocate-nodes.patch added to mm-unstable branch

+ maple_tree-convert-mas_insert-to-preallocate-nodes.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: maple_tree: convert mas_insert() to preallocate nodes
has been added to the -mm mm-unstable branch.  Its filename is
     maple_tree-convert-mas_insert-to-preallocate-nodes.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-convert-mas_insert-to-preallocate-nodes.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: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Subject: maple_tree: convert mas_insert() to preallocate nodes
Date: Tue, 18 Jun 2024 13:47:44 -0700

By setting the store type in mas_insert(), we no longer need to use
mas_wr_modify() to determine the correct store function to use.  Instead,
set the store type and call mas_wr_store_entry().  Also, pass in the
requested gfp flags to mas_insert() so they can be passed to the call to
mas_wr_preallocate().

Link: https://lkml.kernel.org/r/20240618204750.79512-11-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/maple_tree.c |   33 ++++++++++++++++-----------------
 1 file changed, 16 insertions(+), 17 deletions(-)

--- a/lib/maple_tree.c~maple_tree-convert-mas_insert-to-preallocate-nodes
+++ a/lib/maple_tree.c
@@ -4442,11 +4442,12 @@ static inline void mas_wr_preallocate(st
  * mas_insert() - Internal call to insert a value
  * @mas: The maple state
  * @entry: The entry to store
+ * @gfp: The GFP_FLAGS to use for allocations
  *
  * Return: %NULL or the contents that already exists at the requested index
  * otherwise.  The maple state needs to be checked for error conditions.
  */
-static inline void *mas_insert(struct ma_state *mas, void *entry)
+static inline void *mas_insert(struct ma_state *mas, void *entry, gfp_t gfp)
 {
 	MA_WR_STATE(wr_mas, mas, entry);
 
@@ -4468,26 +4469,24 @@ static inline void *mas_insert(struct ma
 	if (wr_mas.content)
 		goto exists;
 
-	if (mas_is_none(mas) || mas_is_ptr(mas)) {
-		mas_store_root(mas, entry);
+	mas_wr_preallocate(&wr_mas, entry, gfp);
+	if (mas_is_err(mas))
 		return NULL;
-	}
 
 	/* spanning writes always overwrite something */
-	if (!mas_wr_walk(&wr_mas))
+	if (mas->store_type == wr_spanning_store)
 		goto exists;
 
 	/* At this point, we are at the leaf node that needs to be altered. */
-	wr_mas.offset_end = mas->offset;
-	wr_mas.end_piv = wr_mas.r_max;
-
-	if (wr_mas.content || (mas->last > wr_mas.r_max))
-		goto exists;
+	if (mas->store_type != wr_new_root && mas->store_type != wr_store_root) {
+		wr_mas.offset_end = mas->offset;
+		wr_mas.end_piv = wr_mas.r_max;
 
-	if (!entry)
-		return NULL;
+		if (wr_mas.content || (mas->last > wr_mas.r_max))
+			goto exists;
+	}
 
-	mas_wr_modify(&wr_mas);
+	mas_wr_store_entry(&wr_mas);
 	return wr_mas.content;
 
 exists:
@@ -4532,7 +4531,7 @@ int mas_alloc_cyclic(struct ma_state *ma
 		return ret;
 
 	do {
-		mas_insert(mas, entry);
+		mas_insert(mas, entry, gfp);
 	} while (mas_nomem(mas, gfp));
 	if (mas_is_err(mas))
 		return xa_err(mas->node);
@@ -6536,7 +6535,7 @@ int mtree_insert_range(struct maple_tree
 
 	mtree_lock(mt);
 retry:
-	mas_insert(&ms, entry);
+	mas_insert(&ms, entry, gfp);
 	if (mas_nomem(&ms, gfp))
 		goto retry;
 
@@ -6585,7 +6584,7 @@ retry:
 	if (ret)
 		goto unlock;
 
-	mas_insert(&mas, entry);
+	mas_insert(&mas, entry, gfp);
 	/*
 	 * mas_nomem() may release the lock, causing the allocated area
 	 * to be unavailable, so try to allocate a free area again.
@@ -6667,7 +6666,7 @@ retry:
 	if (ret)
 		goto unlock;
 
-	mas_insert(&mas, entry);
+	mas_insert(&mas, entry, gfp);
 	/*
 	 * mas_nomem() may release the lock, causing the allocated area
 	 * to be unavailable, so try to allocate a free area again.
_

Patches currently in -mm which might be from sidhartha.kumar@oracle.com are

mm-hugetlb-remove-setclearhpage-macros.patch
mm-hugetlb-mm-memory_hotplug-use-a-folio-in-scan_movable_pages.patch
maple_tree-introduce-store_type-enum.patch
maple_tree-introduce-mas_wr_prealloc_setup.patch
maple_tree-move-up-mas_wr_store_setup-and-mas_wr_prealloc_setup.patch
maple_tree-introduce-mas_wr_store_type.patch
maple_tree-remove-mas_destroy-from-mas_nomem.patch
maple_tree-use-mas_store_gfp-in-mas_erase.patch
maple_tree-use-mas_store_gfp-in-mtree_store_range.patch
maple_tree-print-store-type-in-mas_dump.patch
maple_tree-use-store-type-in-mas_wr_store_entry.patch
maple_tree-convert-mas_insert-to-preallocate-nodes.patch
maple_tree-simplify-mas_commit_b_node.patch
maple_tree-remove-mas_wr_modify.patch
maple_tree-have-mas_store-allocate-nodes-if-needed.patch
maple_tree-remove-node-allocations-from-various-write-helper-functions.patch
maple_tree-remove-repeated-sanity-checks-from-mas_wr_append.patch
maple_tree-remove-unneeded-mas_wr_walk-in-mas_store_prealloc.patch
tools-testing-radix-tree-add-missing-module_description-definition.patch

+ maple_tree-convert-mas_insert-to-preallocate-nodes.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: maple_tree: convert mas_insert() to preallocate nodes
has been added to the -mm mm-unstable branch.  Its filename is
     maple_tree-convert-mas_insert-to-preallocate-nodes.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-convert-mas_insert-to-preallocate-nodes.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: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Subject: maple_tree: convert mas_insert() to preallocate nodes
Date: Wed, 14 Aug 2024 12:19:37 -0400

By setting the store type in mas_insert(), we no longer need to use
mas_wr_modify() to determine the correct store function to use. Instead,
set the store type and call mas_wr_store_entry(). Also, pass in the
requested gfp flags to mas_insert() so they can be passed to the call to
mas_wr_preallocate().

Link: https://lkml.kernel.org/r/20240814161944.55347-11-sidhartha.kumar@oracle.com
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/maple_tree.c |   22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

--- a/lib/maple_tree.c~maple_tree-convert-mas_insert-to-preallocate-nodes
+++ a/lib/maple_tree.c
@@ -4457,26 +4457,24 @@ static inline void *mas_insert(struct ma
 	if (wr_mas.content)
 		goto exists;
 
-	if (mas_is_none(mas) || mas_is_ptr(mas)) {
-		mas_store_root(mas, entry);
+	mas_wr_preallocate(&wr_mas, entry);
+	if (mas_is_err(mas))
 		return NULL;
-	}
 
 	/* spanning writes always overwrite something */
-	if (!mas_wr_walk(&wr_mas))
+	if (mas->store_type == wr_spanning_store)
 		goto exists;
 
 	/* At this point, we are at the leaf node that needs to be altered. */
-	wr_mas.offset_end = mas->offset;
-	wr_mas.end_piv = wr_mas.r_max;
-
-	if (wr_mas.content || (mas->last > wr_mas.r_max))
-		goto exists;
+	if (mas->store_type != wr_new_root && mas->store_type != wr_store_root) {
+		wr_mas.offset_end = mas->offset;
+		wr_mas.end_piv = wr_mas.r_max;
 
-	if (!entry)
-		return NULL;
+		if (wr_mas.content || (mas->last > wr_mas.r_max))
+			goto exists;
+	}
 
-	mas_wr_modify(&wr_mas);
+	mas_wr_store_entry(&wr_mas);
 	return wr_mas.content;
 
 exists:
_

Patches currently in -mm which might be from sidhartha.kumar@oracle.com are

maple_tree-reset-mas-index-and-mas-last-on-write-retries.patch
maple_tree-add-test-to-replicate-low-memory-race-conditions.patch
maple_tree-introduce-store_type-enum.patch
maple_tree-introduce-mas_wr_prealloc_setup.patch
maple_tree-move-up-mas_wr_store_setup-and-mas_wr_prealloc_setup.patch
maple_tree-introduce-mas_wr_store_type.patch
maple_tree-remove-mas_destroy-from-mas_nomem.patch
maple_tree-preallocate-nodes-in-mas_erase.patch
maple_tree-use-mas_store_gfp-in-mtree_store_range.patch
maple_tree-print-store-type-in-mas_dump.patch
maple_tree-use-store-type-in-mas_wr_store_entry.patch
maple_tree-convert-mas_insert-to-preallocate-nodes.patch
maple_tree-simplify-mas_commit_b_node.patch
maple_tree-remove-mas_wr_modify.patch
maple_tree-have-mas_store-allocate-nodes-if-needed.patch
maple_tree-remove-node-allocations-from-various-write-helper-functions.patch
maple_tree-remove-repeated-sanity-checks-from-write-helper-functions.patch
maple_tree-remove-unneeded-mas_wr_walk-in-mas_store_prealloc.patch
maple_tree-make-write-helper-functions-void.patch