+ mm-change-mm-pt_reclaimc-to-use-asm-tlbh-instead-of-asm-generic-tlbh.patch added to mm-new branch

+ mm-change-mm-pt_reclaimc-to-use-asm-tlbh-instead-of-asm-generic-tlbh.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: mm: change mm/pt_reclaim.c to use asm/tlb.h instead of asm-generic/tlb.h
has been added to the -mm mm-new branch.  Its filename is
     mm-change-mm-pt_reclaimc-to-use-asm-tlbh-instead-of-asm-generic-tlbh.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-change-mm-pt_reclaimc-to-use-asm-tlbh-instead-of-asm-generic-tlbh.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

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------------------------------------------------------
From: Qi Zheng <zhengqi.arch@bytedance.com>
Subject: mm: change mm/pt_reclaim.c to use asm/tlb.h instead of asm-generic/tlb.h
Date: Wed, 17 Dec 2025 17:45:42 +0800

Patch series "enable PT_RECLAIM on all 64-bit architectures", v3.

This series aims to enable PT_RECLAIM on all 64-bit architectures.

On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of
empty PTE page table pages (such as 100GB+).  To resolve this problem, we
need to enable PT_RECLAIM, which depends on MMU_GATHER_RCU_TABLE_FREE.

Therefore, this series first enables MMU_GATHER_RCU_TABLE_FREE on all
64-bit architectures, and finally makes PT_RECLAIM depend on
MMU_GATHER_RCU_TABLE_FREE.  This way, PT_RECLAIM can be enabled by default
on all 64-bit architectures.

Of course, this will also be enabled on some 32-bit architectures that
already support MMU_GATHER_RCU_TABLE_FREE.  That's fine, PT_RECLAIM works
well on all 32-bit architectures as well.  Although the benefit isn't
significant, there's still memory that can be reclaimed.  Perhaps
PT_RECLAIM can be enabled on all 32-bit architectures in the future.


This patch (of 7):

Generally, the asm/tlb.h will include asm-generic/tlb.h, so change
mm/pt_reclaim.c to use asm/tlb.h instead of asm-generic/tlb.h.  This is a
preparation for enabling CONFIG_PT_RECLAIM on other architectures, such as
alpha.

Link: https://lkml.kernel.org/r/cover.1765963770.git.zhengqi.arch@bytedance.com
Link: https://lkml.kernel.org/r/67a0725081c82cdc2debce6cbdb9273412039553.1765963770.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <ioworker0@gmail.com>
Cc: Magnus Lindholm <linmag7@gmail.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/pt_reclaim.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/pt_reclaim.c~mm-change-mm-pt_reclaimc-to-use-asm-tlbh-instead-of-asm-generic-tlbh
+++ a/mm/pt_reclaim.c
@@ -2,7 +2,7 @@
 #include <linux/hugetlb.h>
 #include <linux/pgalloc.h>
 
-#include <asm-generic/tlb.h>
+#include <asm/tlb.h>
 
 #include "internal.h"
 
_

Patches currently in -mm which might be from zhengqi.arch@bytedance.com are

mm-change-mm-pt_reclaimc-to-use-asm-tlbh-instead-of-asm-generic-tlbh.patch
alpha-mm-enable-mmu_gather_rcu_table_free.patch
loongarch-mm-enable-mmu_gather_rcu_table_free.patch
mips-mm-enable-mmu_gather_rcu_table_free.patch
parisc-mm-enable-mmu_gather_rcu_table_free.patch
um-mm-enable-mmu_gather_rcu_table_free.patch
mm-make-pt_reclaim-depends-on-mmu_gather_rcu_table_free.patch