[withdrawn] mm-khugepaged-allow-khugepaged-to-check-all-anonymous-mthp-orders.patch removed from -mm tree

[withdrawn] mm-khugepaged-allow-khugepaged-to-check-all-anonymous-mthp-orders.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: khugepaged: allow khugepaged to check all anonymous mTHP orders
has been removed from the -mm tree.  Its filename was
     mm-khugepaged-allow-khugepaged-to-check-all-anonymous-mthp-orders.patch

This patch was dropped because it was withdrawn

------------------------------------------------------
From: Baolin Wang <baolin.wang@linux.alibaba.com>
Subject: mm: khugepaged: allow khugepaged to check all anonymous mTHP orders
Date: Wed, 28 May 2025 20:31:46 +0800

We have now allowed mTHP collapse, but thp_vma_allowable_order() still
only checks if the PMD-sized mTHP is allowed to collapse.  This prevents
scanning and collapsing of 64K mTHP when only 64K mTHP is enabled.  Thus,
we should modify the checks to allow all large orders of anonymous mTHP.

Link: https://lkml.kernel.org/r/ac9ed6d71b439611f9c94b3506a8ce975d4636e9.1748435162.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Lameter (Ampere) <cl@gentwo.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Kirill A. Shuemov <kirill.shutemov@linux.intel.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mariano Pache <npache@redhat.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Rafael Aquini <raquini@redhat.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Reported-by:Takashi Iwai <tiwai@suse.de>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Hellstrom <thomas.hellstrom@linux.intel.com>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <yang@os.amperecomputing.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/khugepaged.c |   13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

--- a/mm/khugepaged.c~mm-khugepaged-allow-khugepaged-to-check-all-anonymous-mthp-orders
+++ a/mm/khugepaged.c
@@ -474,8 +474,11 @@ void khugepaged_enter_vma(struct vm_area
 {
 	if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags) &&
 	    hugepage_pmd_enabled()) {
-		if (thp_vma_allowable_order(vma, vm_flags, TVA_ENFORCE_SYSFS,
-					    PMD_ORDER))
+		unsigned long orders = vma_is_anonymous(vma) ?
+					THP_ORDERS_ALL_ANON : BIT(PMD_ORDER);
+
+		if (thp_vma_allowable_orders(vma, vm_flags, TVA_ENFORCE_SYSFS,
+					    orders))
 			__khugepaged_enter(vma->vm_mm);
 	}
 }
@@ -2399,6 +2402,8 @@ static unsigned int khugepaged_scan_mm_s
 
 	vma_iter_init(&vmi, mm, khugepaged_scan.address);
 	for_each_vma(vmi, vma) {
+		unsigned long orders = vma_is_anonymous(vma) ?
+					THP_ORDERS_ALL_ANON : BIT(PMD_ORDER);
 		unsigned long hstart, hend;
 
 		cond_resched();
@@ -2406,8 +2411,8 @@ static unsigned int khugepaged_scan_mm_s
 			progress++;
 			break;
 		}
-		if (!thp_vma_allowable_order(vma, vma->vm_flags,
-					TVA_ENFORCE_SYSFS, PMD_ORDER)) {
+		if (!thp_vma_allowable_orders(vma, vma->vm_flags,
+					TVA_ENFORCE_SYSFS, orders)) {
 skip:
 			progress++;
 			continue;
_

Patches currently in -mm which might be from baolin.wang@linux.alibaba.com are

mm-khugepaged-kick-khugepaged-for-enabling-none-pmd-sized-mthps.patch
mm-fix-the-inaccurate-memory-statistics-issue-for-users.patch