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Mon, 01 Dec 2025 12:48:22 -0500 X-MC-Unique: LPOO6yvWMW63oEqcofsNxw-1 X-Mimecast-MFC-AGG-ID: LPOO6yvWMW63oEqcofsNxw_1764611297 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B9071180122B; Mon, 1 Dec 2025 17:48:14 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.66.60]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 21AB1180047F; Mon, 1 Dec 2025 17:48:04 +0000 (UTC) From: Nico Pache To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org Cc: david@redhat.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, ryan.roberts@arm.com, dev.jain@arm.com, corbet@lwn.net, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, akpm@linux-foundation.org, baohua@kernel.org, willy@infradead.org, peterx@redhat.com, wangkefeng.wang@huawei.com, usamaarif642@gmail.com, sunnanyong@huawei.com, vishal.moola@gmail.com, thomas.hellstrom@linux.intel.com, yang@os.amperecomputing.com, kas@kernel.org, aarcange@redhat.com, raquini@redhat.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, tiwai@suse.de, will@kernel.org, dave.hansen@linux.intel.com, jack@suse.cz, cl@gentwo.org, jglisse@google.com, surenb@google.com, zokeefe@google.com, hannes@cmpxchg.org, rientjes@google.com, mhocko@suse.com, rdunlap@infradead.org, hughd@google.com, richard.weiyang@gmail.com, lance.yang@linux.dev, vbabka@suse.cz, rppt@kernel.org, jannh@google.com, pfalcato@suse.de Subject: [PATCH v13 mm-new 05/16] khugepaged: introduce is_mthp_order helper Date: Mon, 1 Dec 2025 10:46:16 -0700 Message-ID: <20251201174627.23295-6-npache@redhat.com> In-Reply-To: <20251201174627.23295-1-npache@redhat.com> References: <20251201174627.23295-1-npache@redhat.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 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Content-Type: text/plain; charset="utf-8" In order to add mTHP support, we will often be checking if a given order is a mTHP or PMD order. Lets create a simple helper function to keep the code clean and readable. Suggested-by: Lorenzo Stoakes Signed-off-by: Nico Pache --- mm/khugepaged.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 8599c7fa112e..9c041141b2e3 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -338,6 +338,11 @@ static bool pte_none_or_zero(pte_t pte) return pte_present(pte) && is_zero_pfn(pte_pfn(pte)); } =20 +static bool is_mthp_order(unsigned int order) +{ + return order !=3D HPAGE_PMD_ORDER; +} + int hugepage_madvise(struct vm_area_struct *vma, vm_flags_t *vm_flags, int advice) { @@ -1071,13 +1076,13 @@ static int alloc_charge_folio(struct folio **foliop= , struct mm_struct *mm, folio =3D __folio_alloc(gfp, order, node, &cc->alloc_nmask); if (!folio) { *foliop =3D NULL; - if (order =3D=3D HPAGE_PMD_ORDER) + if (!is_mthp_order(order)) count_vm_event(THP_COLLAPSE_ALLOC_FAILED); count_mthp_stat(order, MTHP_STAT_COLLAPSE_ALLOC_FAILED); return SCAN_ALLOC_HUGE_PAGE_FAIL; } =20 - if (order =3D=3D HPAGE_PMD_ORDER) + if (!is_mthp_order(order)) count_vm_event(THP_COLLAPSE_ALLOC); count_mthp_stat(order, MTHP_STAT_COLLAPSE_ALLOC); =20 --=20 2.51.1