[PATCH v7 00/70] Introducing the Maple Tree

Andrew Morton akpm at linux-foundation.org
Wed Apr 13 23:50:51 PDT 2022

On Mon, 4 Apr 2022 14:35:26 +0000 Liam Howlett <liam.howlett at oracle.com> wrote:

> Please add this patch set to your branch.  They are based on v5.18-rc1.

Do we get a nice [0/n] cover letter telling us all about this?

I have that all merged up and it compiles.

https://lkml.kernel.org/r/20220402094550.129-1-lipeifeng@oppo.com and
https://lkml.kernel.org/r/20220412081014.399-1-lipeifeng@oppo.com are
disabled for now.

Several patches were marked

From: Liam
Signed-off-by: Matthew
Signed-off-by: Liam

Which makes me wonder whether the attribution was correct.  Please

I made a lame attempt to fix up mglru's get_next_vma(), and it probably
wants a revisit in the maple-tree world anyway.  Please check this and
send me a better version ;)

--- a/mm/vmscan.c~mglru-vs-maple-tree
+++ a/mm/vmscan.c
@@ -3704,7 +3704,7 @@ static bool get_next_vma(struct mm_walk
 	while (walk->vma) {
 		if (next >= walk->vma->vm_end) {
-			walk->vma = walk->vma->vm_next;
+			walk->vma = find_vma(walk->mm, walk->vma->vm_end);
@@ -3712,7 +3712,7 @@ static bool get_next_vma(struct mm_walk
 			return false;
 		if (should_skip_vma(walk->vma->vm_start, walk->vma->vm_end, walk)) {
-			walk->vma = walk->vma->vm_next;
+			walk->vma = find_vma(walk->mm, walk->vma->vm_end);
@@ -4062,7 +4062,7 @@ static void walk_mm(struct lruvec *lruve
 		/* the caller might be holding the lock for write */
 		if (mmap_read_trylock(mm)) {
 			unsigned long start = walk->next_addr;
-			unsigned long end = mm->highest_vm_end;
+			unsigned long end = TASK_SIZE;
 			err = walk_page_range(mm, start, end, &mm_walk_ops, walk);

I flung a tree up at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mmtemp containing
mglru and mapletree and a few other things.  Could the mglru and
mapletree people please runtime test it, send any fixes?

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