The patch titled
Subject: mm/khugepaged: keep mm in mm_slot without MMF_DISABLE_THP check
has been added to the -mm mm-unstable branch. Its filename is
mm-khugepaged-keep-mm-in-mm_slot-without-mmf_disable_thp-check.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-khugepaged-keep-mm-in-mm_slot-without-mmf_disable_thp-check.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Lance Yang <ioworker0@xxxxxxxxx>
Subject: mm/khugepaged: keep mm in mm_slot without MMF_DISABLE_THP check
Date: Tue, 27 Feb 2024 11:51:35 +0800
Previously, we removed the mm from mm_slot and dropped mm_count
if the MMF_THP_DISABLE flag was set. However, we didn't re-add
the mm back after clearing the MMF_THP_DISABLE flag. Additionally,
We add a check for the MMF_THP_DISABLE flag in hugepage_vma_revalidate().
Link: https://lkml.kernel.org/r/20240227035135.54593-1-ioworker0@xxxxxxxxx
Fixes: 879c6000e191 ("mm/khugepaged: bypassing unnecessary scans with MMF_DISABLE_THP check")
Signed-off-by: Lance Yang <ioworker0@xxxxxxxxx>
Suggested-by: Yang Shi <shy828301@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Zach O'Keefe <zokeefe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/khugepaged.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/khugepaged.c~mm-khugepaged-keep-mm-in-mm_slot-without-mmf_disable_thp-check
+++ a/mm/khugepaged.c
@@ -920,7 +920,7 @@ static int hugepage_vma_revalidate(struc
{
struct vm_area_struct *vma;
- if (unlikely(hpage_collapse_test_exit(mm)))
+ if (unlikely(hpage_collapse_test_exit_or_disable(mm)))
return SCAN_ANY_PROCESS;
*vmap = vma = find_vma(mm, address);
@@ -1428,7 +1428,7 @@ static void collect_mm_slot(struct khuge
lockdep_assert_held(&khugepaged_mm_lock);
- if (hpage_collapse_test_exit_or_disable(mm)) {
+ if (hpage_collapse_test_exit(mm)) {
/* free mm_slot */
hash_del(&slot->hash);
list_del(&slot->mm_node);
@@ -2456,7 +2456,7 @@ breakouterloop_mmap_lock:
* Release the current mm_slot if this mm is about to die, or
* if we scanned all vmas of this mm.
*/
- if (hpage_collapse_test_exit_or_disable(mm) || !vma) {
+ if (hpage_collapse_test_exit(mm) || !vma) {
/*
* Make sure that if mm_users is reaching zero while
* khugepaged runs here, khugepaged_exit will find
_
Patches currently in -mm which might be from ioworker0@xxxxxxxxx are
mm-khugepaged-keep-mm-in-mm_slot-without-mmf_disable_thp-check.patch
