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Sun, 01 Feb 2026 04:26:59 -0800 (PST) From: Vernon Yang To: akpm@linux-foundation.org, david@kernel.org Cc: lorenzo.stoakes@oracle.com, ziy@nvidia.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vernon Yang Subject: [PATCH mm-new v6 5/5] mm: khugepaged: set to next mm direct when mm has MMF_DISABLE_THP_COMPLETELY Date: Sun, 1 Feb 2026 20:25:54 +0800 Message-ID: <20260201122554.1470071-6-vernon2gm@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260201122554.1470071-1-vernon2gm@gmail.com> References: <20260201122554.1470071-1-vernon2gm@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Vernon Yang When an mm with the MMF_DISABLE_THP_COMPLETELY flag is detected during scanning, directly set khugepaged_scan.mm_slot to the next mm_slot, reduce redundant operation. Without this patch, entering khugepaged_scan_mm_slot() next time, we will set khugepaged_scan.mm_slot to the next mm_slot. With this patch, we will directly set khugepaged_scan.mm_slot to the next mm_slot. Signed-off-by: Vernon Yang Acked-by: David Hildenbrand (Red Hat) Reviewed-by: Lance Yang Reviewed-by: Dev Jain Reviewed-by: Barry Song --- mm/khugepaged.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index b4def001ccd0..94cd064f79a5 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -2549,9 +2549,9 @@ static unsigned int khugepaged_scan_mm_slot(unsigned = int pages, enum scan_result VM_BUG_ON(khugepaged_scan.mm_slot !=3D slot); /* * Release the current mm_slot if this mm is about to die, or - * if we scanned all vmas of this mm. + * if we scanned all vmas of this mm, or THP got disabled. */ - if (hpage_collapse_test_exit(mm) || !vma) { + if (hpage_collapse_test_exit_or_disable(mm) || !vma) { /* * Make sure that if mm_users is reaching zero while * khugepaged runs here, khugepaged_exit will find --=20 2.51.0