* + mm-collapse-drop-the-collapse_possible-wrapper.patch added to mm-unstable branch
@ 2026-09-16 22:48 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2026-09-16 22:48 UTC (permalink / raw)
To: mm-commits, kas, akpm
The patch titled
Subject: mm/collapse: drop the collapse_possible() wrapper
has been added to the -mm mm-unstable branch. Its filename is
mm-collapse-drop-the-collapse_possible-wrapper.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-collapse-drop-the-collapse_possible-wrapper.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 various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
Subject: mm/collapse: drop the collapse_possible() wrapper
Date: Wed, 16 Sep 2026 10:31:33 +0100
collapse_possible() only forwards to collapse_possible_orders() and turns
its mask into a bool. Its three callers can test the mask themselves.
No functional change.
Assisted-by: LLM
Link: https://lore.kernel.org/20260916093145.4022188-7-kirill@shutemov.name
Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jann Horn <jannh@google.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
---
mm/khugepaged.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
--- a/mm/khugepaged.c~mm-collapse-drop-the-collapse_possible-wrapper
+++ a/mm/khugepaged.c
@@ -512,17 +512,11 @@ static unsigned long collapse_possible_o
return thp_vma_allowable_orders(vma, vm_flags, tva_flags, orders);
}
-static bool collapse_possible(struct vm_area_struct *vma,
- vm_flags_t vm_flags, enum tva_type tva_flags)
-{
- return collapse_possible_orders(vma, vm_flags, tva_flags);
-}
-
void khugepaged_enter_vma(struct vm_area_struct *vma,
vm_flags_t vm_flags)
{
- if (!mm_flags_test(MMF_VM_HUGEPAGE, vma->vm_mm) && hugepage_enabled()
- && collapse_possible(vma, vm_flags, TVA_KHUGEPAGED))
+ if (!mm_flags_test(MMF_VM_HUGEPAGE, vma->vm_mm) && hugepage_enabled() &&
+ collapse_possible_orders(vma, vm_flags, TVA_KHUGEPAGED))
__khugepaged_enter(vma->vm_mm);
}
@@ -2850,7 +2844,8 @@ static void collapse_scan_mm_slot(unsign
cc->progress++;
break;
}
- if (!collapse_possible(vma, vma->vm_flags, TVA_KHUGEPAGED)) {
+ if (!collapse_possible_orders(vma, vma->vm_flags,
+ TVA_KHUGEPAGED)) {
cc->progress++;
continue;
}
@@ -3163,7 +3158,7 @@ int madvise_collapse(struct vm_area_stru
BUG_ON(vma->vm_start > start);
BUG_ON(vma->vm_end < end);
- if (!collapse_possible(vma, vma->vm_flags, TVA_FORCED_COLLAPSE))
+ if (!collapse_possible_orders(vma, vma->vm_flags, TVA_FORCED_COLLAPSE))
return -EINVAL;
hstart = ALIGN(start, HPAGE_PMD_SIZE);
_
Patches currently in -mm which might be from kas@kernel.org are
mm-huge_memory-do-not-touch-frozen-folios-in-deferred_split_isolate.patch
mm-huge_memory-dequeue-the-deferred-split-after-the-split-freeze.patch
mm-huge_memory-add-folio_reset_partially_mapped.patch
mm-khugepaged-drop-redundant-mm_struct-pin-in-madvise_collapse.patch
mm-khugepaged-count-collapses-where-khugepaged-makes-them.patch
mm-khugepaged-rename-mthp_present_ptes-bitmap-to-eligible_ptes.patch
mm-collapse-add-collapseh-for-the-collapse-interface.patch
mm-collapse-state-what-a-collapse-may-do-in-the-policy.patch
mm-collapse-drop-the-collapse_possible-wrapper.patch
mm-collapse-name-the-per-table-scan-reset-for-what-it-resets.patch
mm-collapse-separate-scanning-a-pte-table-from-collapsing-it.patch
mm-collapse-open-code-collapse_single_pmd-in-its-two-callers.patch
mm-collapse-work-out-the-orders-a-vma-allows-once-per-vma.patch
mm-collapse-declare-the-collapse-interface-in-collapseh.patch
mm-collapse-implement-madv_collapse-in-madvisec.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
* + mm-collapse-drop-the-collapse_possible-wrapper.patch added to mm-unstable branch
@ 2026-09-28 22:01 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2026-09-28 22:01 UTC (permalink / raw)
To: mm-commits, kas, akpm
The patch titled
Subject: mm/collapse: drop the collapse_possible() wrapper
has been added to the -mm mm-unstable branch. Its filename is
mm-collapse-drop-the-collapse_possible-wrapper.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-collapse-drop-the-collapse_possible-wrapper.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 various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
Subject: mm/collapse: drop the collapse_possible() wrapper
Date: Mon, 28 Sep 2026 11:06:20 +0100
collapse_possible() only forwards to collapse_possible_orders() and turns
its mask into a bool. Its three callers can test the mask themselves.
No functional change.
Link: https://lore.kernel.org/20260928100630.21870-7-kirill@shutemov.name
Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Assisted-by: LLM
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Nico Pache <nico.pache@linux.dev>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Jann Horn <jannh@google.com>
---
mm/khugepaged.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
--- a/mm/khugepaged.c~mm-collapse-drop-the-collapse_possible-wrapper
+++ a/mm/khugepaged.c
@@ -494,17 +494,11 @@ static unsigned long collapse_possible_o
return thp_vma_allowable_orders(vma, vm_flags, tva_flags, orders);
}
-static bool collapse_possible(struct vm_area_struct *vma,
- vm_flags_t vm_flags, enum tva_type tva_flags)
-{
- return collapse_possible_orders(vma, vm_flags, tva_flags);
-}
-
void khugepaged_enter_vma(struct vm_area_struct *vma,
vm_flags_t vm_flags)
{
- if (!mm_flags_test(MMF_VM_HUGEPAGE, vma->vm_mm) && hugepage_enabled()
- && collapse_possible(vma, vm_flags, TVA_KHUGEPAGED))
+ if (!mm_flags_test(MMF_VM_HUGEPAGE, vma->vm_mm) && hugepage_enabled() &&
+ collapse_possible_orders(vma, vm_flags, TVA_KHUGEPAGED))
__khugepaged_enter(vma->vm_mm);
}
@@ -2878,7 +2872,8 @@ static void collapse_scan_mm_slot(unsign
cc->progress++;
break;
}
- if (!collapse_possible(vma, vma->vm_flags, TVA_KHUGEPAGED)) {
+ if (!collapse_possible_orders(vma, vma->vm_flags,
+ TVA_KHUGEPAGED)) {
cc->progress++;
continue;
}
@@ -3190,7 +3185,7 @@ int madvise_collapse(struct vm_area_stru
BUG_ON(vma->vm_start > start);
BUG_ON(vma->vm_end < end);
- if (!collapse_possible(vma, vma->vm_flags, TVA_FORCED_COLLAPSE))
+ if (!collapse_possible_orders(vma, vma->vm_flags, TVA_FORCED_COLLAPSE))
return -EINVAL;
hstart = ALIGN(start, HPAGE_PMD_SIZE);
_
Patches currently in -mm which might be from kas@kernel.org are
mm-huge_memory-do-not-touch-frozen-folios-in-deferred_split_isolate.patch
mm-huge_memory-dequeue-the-deferred-split-after-the-split-freeze.patch
mm-huge_memory-add-folio_reset_partially_mapped.patch
mm-khugepaged-drop-redundant-mm_struct-pin-in-madvise_collapse.patch
mm-khugepaged-count-collapses-where-khugepaged-makes-them.patch
mm-khugepaged-rename-mthp_present_ptes-bitmap-to-eligible_ptes.patch
mm-collapse-add-collapseh-for-the-collapse-interface.patch
mm-collapse-state-what-a-collapse-may-do-in-the-policy.patch
mm-collapse-drop-the-collapse_possible-wrapper.patch
mm-collapse-name-the-per-table-scan-reset-for-what-it-resets.patch
mm-collapse-call-collapse_file-from-collapse_single_pmd.patch
mm-collapse-separate-scanning-a-pte-table-from-collapsing-it.patch
mm-collapse-open-code-collapse_single_pmd-in-its-two-callers.patch
mm-collapse-work-out-the-orders-a-vma-allows-once-per-vma.patch
mm-collapse-declare-the-collapse-interface-in-collapseh.patch
mm-collapse-implement-madv_collapse-in-madvisec.patch
selftests-mm-raise-the-khugepaged-test-case-cap.patch
selftests-mm-skip-collapse_compound_extreme-where-the-pmd-is-too-large.patch
selftests-mm-scale-khugepageds-collapse-wait-with-the-pmd-size.patch
selftests-mm-skip-khugepaged-page-cache-cases-without-a-pmd-folio.patch
selftests-mm-make-the-swap-cases-swapout-reliable.patch
selftests-mm-stop-khugepaged-during-the-madv_collapse-cases.patch
selftests-mm-move-is_backed_by_folio-into-vm_util.patch
selftests-mm-add-folio-order-check-for-address-ranges.patch
selftests-mm-add-folio-order-detection-self-check.patch
selftests-mm-add-khugepaged-completion-barrier-helper.patch
selftests-mm-add-order-parameterized-khugepaged-collapse-cases.patch
selftests-mm-parameterize-the-mixed-source-collapse-case-by-source-order.patch
selftests-mm-cover-a-shared-source-collapse-write-race.patch
selftests-mm-run-every-supported-collapse-order-by-default.patch
selftests-mm-check-that-one-khugepaged-pass-collapses-one-window.patch
selftests-mm-add-khugepaged-race-harness.patch
selftests-mm-race-the-collapse-of-windows-with-holes.patch
selftests-mm-add-memory-pressure-threads-to-the-khugepaged-race-harness.patch
selftests-mm-zap-whole-pte-tables-in-the-khugepaged-race-harness.patch
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