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No functional change. Signed-off-by: Shivank Garg Acked-by: David Hildenbrand (Red Hat) Reviewed-by: Liam R. Howlett --- mm/khugepaged.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 6c8c35d3e0c9..107146f012b1 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -2442,14 +2442,15 @@ static unsigned int khugepaged_scan_mm_slot(unsigne= d int pages, int *result, break; } if (!thp_vma_allowable_order(vma, vma->vm_flags, TVA_KHUGEPAGED, PMD_ORD= ER)) { -skip: progress++; continue; } hstart =3D round_up(vma->vm_start, HPAGE_PMD_SIZE); hend =3D round_down(vma->vm_end, HPAGE_PMD_SIZE); - if (khugepaged_scan.address > hend) - goto skip; + if (khugepaged_scan.address > hend) { + progress++; + continue; + } if (khugepaged_scan.address < hstart) khugepaged_scan.address =3D hstart; VM_BUG_ON(khugepaged_scan.address & ~HPAGE_PMD_MASK); --=20 2.43.0 From nobody Sun Feb 8 08:27:54 2026 Received: from CH4PR04CU002.outbound.protection.outlook.com (mail-northcentralusazon11013011.outbound.protection.outlook.com [40.107.201.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5D6A0257AEC; 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Tue, 16 Dec 2025 05:13:27 -0600 From: Shivank Garg To: Andrew Morton , David Hildenbrand , Lorenzo Stoakes CC: Zi Yan , Baolin Wang , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , , , , Subject: [PATCH 2/3] mm/khugepaged: use enum scan_result for result variables Date: Tue, 16 Dec 2025 11:11:40 +0000 Message-ID: <20251216111139.95438-6-shivankg@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251216111139.95438-2-shivankg@amd.com> References: <20251216111139.95438-2-shivankg@amd.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-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002316:EE_|MN2PR12MB4272:EE_ X-MS-Office365-Filtering-Correlation-Id: a2fa92f9-4e4d-46d3-ae15-08de3c9425df X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|1800799024|7416014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Ds97ZhIFJadeUvrNPVq5cyMaRqP+PVr9l2IH5DY39fZaC0n8eNYHO8ZV2y18?= =?us-ascii?Q?K+zhVZd33qxje/PttLQOKNogX2n1QjfQ3fD2AvPb0HuKPPEP5weeFGKMk/Mi?= =?us-ascii?Q?CbsWLg7WrPFWWoze9RKefijzcIeDnKajCF+Lzpgep5YCDZgSqlzN4x75VhT7?= =?us-ascii?Q?Mq1XE7ooSZN38NQPvGxnVr7W7MOQfCG2aGfoBAJtCujtZQ2CfM3d/YpXXUGz?= =?us-ascii?Q?GGAeyHGsuVo7bCHPiCrPcwpgdKTkh7QJrx9tIBzvsi78Hmo7I0zYPaeh+nRc?= =?us-ascii?Q?BAp60LsYm0rwdYzYOjRD4+uWrw9FLn0Oz9sr+gMHqkKZRFZxALyRxC+aDnUN?= =?us-ascii?Q?/e/jeUSccCHjX3FXm0XdLyCI83w6R/5nTsN+kj7kMKMwAhsubBXAk7xfxJp7?= =?us-ascii?Q?e17y+HwJBq/fUwPHZyw5NYkzb4kewzmpvRw/LZJ5uQcgAsBfd+6HCT5ntmNf?= =?us-ascii?Q?+OfK41JUQAXda46qYvGZWH2flaekdgG3Oi1UR8TKR+thT5bJCPcNsLBTq1hk?= =?us-ascii?Q?TndbyPaSkpbKTvq3iMA1QQX8Rx+PWK/AVYcEVfEH4CbY6eQMbyn9LOgAHOtQ?= =?us-ascii?Q?f5trtcEhN7in/JFqa0NVt4HyDMdI31uVF+XHdukVCwmq/06q2jp1ak4Kcstl?= =?us-ascii?Q?oFzvUVzl5DK5LlmJZ9I2J0+Iv27n9XrA9+52LVzKDcGDE5C5oFeYq/Av815x?= =?us-ascii?Q?xhVK/yxZqngIhwWPeYbMP+xxozC0FqUTFivQuGuL8kRrGc/RdZphx015UFjG?= =?us-ascii?Q?EBw4SACzHZhbXmFKZHE7KC/V+j8PI5wLUi4Yxnj3rNO/8h9dRtROdUSXx6hn?= =?us-ascii?Q?aYNoHvjfAqjGFxUO0LFtia2NqsYv5H9t2kF6PoaAzO5ExhJXd1KLRR01jwac?= =?us-ascii?Q?M5zb3anHwDqxOgCNlaeeihNrvrWu68U/Nddng29g6u2gUWCA3hiPEC+n2J0s?= =?us-ascii?Q?UCu2axoDSeyrjsLiNnIcW461yVRSCdEsCdhmWkoALOHef22U2IlX3Ert7OfO?= =?us-ascii?Q?cqvB2H7CP7fMmdMCvEowNqV/9SCdF89UC1i0oiFp+UbVWD51oKka5eSqsF96?= =?us-ascii?Q?lQ6GwiBquRLxTe576iwcvDfKuGYXZEET6E8TY1SbBy1qM8bqdKgUohTERgBV?= =?us-ascii?Q?loREkYMuCo0fZDqY1nXEa3NOPcPzelJxenFPFuNlI2/LCOXx4ZD/ZMS420wJ?= =?us-ascii?Q?uVNRTOZxMQIOMhe9Dvgp4oSVdvAEaobhZnqB67Uxq7ocLzeVLOVKq246GGqS?= =?us-ascii?Q?ynaAbqI8enRKMyy2xWPVjN67+vzuChoqcMcLd9q3C9+2qo1F+TwwDF4aleTS?= =?us-ascii?Q?77iY2izo3XbRaR1mmCee1vPN0VSC8jo1FsE9QK+8Ot+7IYUrC8ncOMLXKGds?= =?us-ascii?Q?c2Q4imVSrtAv/6W2/209QEGofmARuiPZrWhOxD2Gn2lauxRDlCt8hjjUvJ9j?= =?us-ascii?Q?iQMxJBq/B5KgBacEYdxYioyH8ZmIYx+iBC9t09KKnutHwozPAxWjPSVBtHwE?= =?us-ascii?Q?txMElr6FRGTKYlSUXMs1g+t8tfNK86jBvqqUXmMsoElHr+LYFWPzJBjRHJCt?= =?us-ascii?Q?0fTYwL7QCzvHyNQiazg=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700013)(376014)(1800799024)(7416014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Dec 2025 11:13:32.0090 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a2fa92f9-4e4d-46d3-ae15-08de3c9425df X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002316.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4272 Content-Type: text/plain; charset="utf-8" Use enum scan_result for local variables and the result pointer in khugepaged_scan_mm_slot(), instead of plain int. This improves code readability and clarifies intent, No functional change. Signed-off-by: Shivank Garg --- mm/khugepaged.c | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 107146f012b1..65b1b778378a 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -547,7 +547,8 @@ static int __collapse_huge_page_isolate(struct vm_area_= struct *vma, struct folio *folio =3D NULL; unsigned long addr =3D start_addr; pte_t *_pte; - int none_or_zero =3D 0, shared =3D 0, result =3D SCAN_FAIL, referenced = =3D 0; + int none_or_zero =3D 0, shared =3D 0, referenced =3D 0; + enum scan_result result =3D SCAN_FAIL; =20 for (_pte =3D pte; _pte < pte + HPAGE_PMD_NR; _pte++, addr +=3D PAGE_SIZE) { @@ -786,7 +787,7 @@ static int __collapse_huge_page_copy(pte_t *pte, struct= folio *folio, struct list_head *compound_pagelist) { unsigned int i; - int result =3D SCAN_SUCCEED; + enum scan_result result =3D SCAN_SUCCEED; =20 /* * Copying pages' contents is subject to memory poison at any iteration. @@ -969,7 +970,7 @@ static int check_pmd_still_valid(struct mm_struct *mm, pmd_t *pmd) { pmd_t *new_pmd; - int result =3D find_pmd_or_thp_or_none(mm, address, &new_pmd); + enum scan_result result =3D find_pmd_or_thp_or_none(mm, address, &new_pmd= ); =20 if (result !=3D SCAN_SUCCEED) return result; @@ -993,7 +994,7 @@ static int __collapse_huge_page_swapin(struct mm_struct= *mm, int swapped_in =3D 0; vm_fault_t ret =3D 0; unsigned long addr, end =3D start_addr + (HPAGE_PMD_NR * PAGE_SIZE); - int result; + enum scan_result result; pte_t *pte =3D NULL; spinlock_t *ptl; =20 @@ -1100,7 +1101,7 @@ static int collapse_huge_page(struct mm_struct *mm, u= nsigned long address, pgtable_t pgtable; struct folio *folio; spinlock_t *pmd_ptl, *pte_ptl; - int result =3D SCAN_FAIL; + enum scan_result result =3D SCAN_FAIL; struct vm_area_struct *vma; struct mmu_notifier_range range; =20 @@ -1253,8 +1254,8 @@ static int hpage_collapse_scan_pmd(struct mm_struct *= mm, { pmd_t *pmd; pte_t *pte, *_pte; - int result =3D SCAN_FAIL, referenced =3D 0; - int none_or_zero =3D 0, shared =3D 0; + int none_or_zero =3D 0, shared =3D 0, referenced =3D 0; + enum scan_result result =3D SCAN_FAIL; struct page *page =3D NULL; struct folio *folio =3D NULL; unsigned long addr; @@ -1492,7 +1493,8 @@ static int set_huge_pmd(struct vm_area_struct *vma, u= nsigned long addr, int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr, bool install_pmd) { - int nr_mapped_ptes =3D 0, result =3D SCAN_FAIL; + enum scan_result result =3D SCAN_FAIL; + int nr_mapped_ptes =3D 0; unsigned int nr_batch_ptes; struct mmu_notifier_range range; bool notified =3D false; @@ -1866,7 +1868,8 @@ static int collapse_file(struct mm_struct *mm, unsign= ed long addr, pgoff_t index =3D 0, end =3D start + HPAGE_PMD_NR; LIST_HEAD(pagelist); XA_STATE_ORDER(xas, &mapping->i_pages, start, HPAGE_PMD_ORDER); - int nr_none =3D 0, result =3D SCAN_SUCCEED; + enum scan_result result =3D SCAN_SUCCEED; + int nr_none =3D 0; bool is_shmem =3D shmem_file(file); =20 VM_BUG_ON(!IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) && !is_shmem); @@ -2296,7 +2299,7 @@ static int hpage_collapse_scan_file(struct mm_struct = *mm, unsigned long addr, XA_STATE(xas, &mapping->i_pages, start); int present, swap; int node =3D NUMA_NO_NODE; - int result =3D SCAN_SUCCEED; + enum scan_result result =3D SCAN_SUCCEED; =20 present =3D 0; swap =3D 0; @@ -2394,7 +2397,7 @@ static int hpage_collapse_scan_file(struct mm_struct = *mm, unsigned long addr, return result; } =20 -static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *resul= t, +static unsigned int khugepaged_scan_mm_slot(unsigned int pages, enum scan_= result *result, struct collapse_control *cc) __releases(&khugepaged_mm_lock) __acquires(&khugepaged_mm_lock) @@ -2555,7 +2558,7 @@ static void khugepaged_do_scan(struct collapse_contro= l *cc) unsigned int progress =3D 0, pass_through_head =3D 0; unsigned int pages =3D READ_ONCE(khugepaged_pages_to_scan); bool wait =3D true; - int result =3D SCAN_SUCCEED; + enum scan_result result =3D SCAN_SUCCEED; =20 lru_add_drain_all(); =20 @@ -2790,7 +2793,7 @@ int madvise_collapse(struct vm_area_struct *vma, unsi= gned long start, =20 for (addr =3D hstart; addr < hend; addr +=3D HPAGE_PMD_SIZE) { bool retried =3D false; 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Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , , , , Subject: [PATCH 3/3] mm/khugepaged: make khugepaged_collapse_control static Date: Tue, 16 Dec 2025 11:11:42 +0000 Message-ID: <20251216111139.95438-8-shivankg@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251216111139.95438-2-shivankg@amd.com> References: <20251216111139.95438-2-shivankg@amd.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-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002317:EE_|IA4PR12MB9761:EE_ X-MS-Office365-Filtering-Correlation-Id: 9a63c901-f0b9-4a91-455b-08de3c9435da X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|82310400026|376014|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?sLPll4SIUGsatpwDwNk2YtpAfj7q2ndn8+dm8VjjrYTMY5WMcvly4xx1qM/t?= =?us-ascii?Q?HCL8BXL8BEDToZa9joIr/2UJ2psI7qLFxHEz1vD3vH4/5QeyEVEo4uknoTiy?= =?us-ascii?Q?Zc7f6v7tkgfff4iiTXyPrEUqLezoi4jQnpt6M0+e7ovEadD9gDdFlXzZVF4r?= =?us-ascii?Q?dm3LdGhcTdT8fPIOvw2gwvUWlJoZoPU6shinvgXulgdGkz/TqZVwprRpWVMD?= =?us-ascii?Q?AgBbnzbuJuLQHOo6+Z+N7VRgjwsSF1iEbvqGzlI1Zyy8TSU4rhYn4XlrRI6D?= =?us-ascii?Q?Dk7AkikNBJ701kv3E1BGnM1UGDiCWgoE0r5BRARJHqJpbsPR/Hlbp5c7OxhF?= =?us-ascii?Q?Grbw9BmqwpZCaGR6elhPi4EVLAS8Si1oYrYo9gqsnFu9vOZQc94qZS50J+j2?= =?us-ascii?Q?k6TdqZie3Hh9or8lQg0VCX2YuR8kFZzlbO79gSeM/HdjMIchWKeYNTyF7uzP?= =?us-ascii?Q?16QfzRQsVwkZr3qk8EAiOGQGdCsIEJLFBIYDx0m8zoDCJTJx05XIBv7Sc5X/?= =?us-ascii?Q?tG7oKu1fDqtRXmlEKr2gEGkBDG1gcTU60YO9G/i205t3ItMz2ihtWKXDh+hY?= =?us-ascii?Q?ADHxc1+kryYZCVP21+MGDU223JhM0E/0P97gUty+3bDx8ezQsaf9DBqeSziu?= =?us-ascii?Q?FoehTv0UPko+Ic9uhnDvt+3MIs6w5+qks5FceeiHBK2qQRip1sBfFHYuiJmh?= =?us-ascii?Q?7Iq/W1bvT83dDCI8VlM2b2DD2dywuYh59EuQrKEi956sVRj5prT8CjoIwUXb?= =?us-ascii?Q?AAyN6zC1O3lVpw2eSD+bOyCJnjCarvIFJ9Bq9Z10WDOgcW7w8bt2YOAOztnA?= =?us-ascii?Q?UHRrcWkQDVV/VDDGX4ab4XoR5IrHqRsC/pDjsYp14uBo+/yNnK/TeqpRS4b9?= =?us-ascii?Q?AwsTJHa/eQZB/Alhz+4Vcql6oMvdy1hN0inTZ1sAw6l4/bSRjdNSRJeYaTWK?= =?us-ascii?Q?xucKUp6aYzq2dW7OcDBjhmLqgfkVN/h34bTTTUJTvrBTJ80iLNK9EjSzxZIM?= =?us-ascii?Q?CPiUoDXW0TEUkstkzqWE7phx0BBSwAUaPLYcuzicVSiltnTZypP8yimXq0Xl?= =?us-ascii?Q?wrqjX7sV+r6DT9pcEyQM3Mdmx46ZABbEjhborbo03Yl1xCcuybn78TS3Kp1r?= =?us-ascii?Q?0vCR+9X8VmsvvMKMyeEtUJHis6f7T53vg62PIO8kMfW4UPLrJlTNgacuDy0x?= =?us-ascii?Q?wydKvkVcXaWOzSpd6T/lHzWifq43iUTlMM7lqHzDMWCyVcTM1zPLP/YbZW0i?= =?us-ascii?Q?nzeR+SisMzLN/00Wt+QvSCpRGj26lNyoRDUAo4Eil+6y9PUwkjOdDiEMepbW?= =?us-ascii?Q?ENJxrEhdkLtNn2k6zWZATxP3lZm/icWk82dCatO2CMOmOQkYKVCiPUgkK1k6?= =?us-ascii?Q?JAaAcJtwWbiNp0/xjseL4XcGC6LsWAaoOoW1aSa4EmrVN1X5tKhWkNHN3Q4k?= =?us-ascii?Q?X2VpyiogYE4uinZNSRUTbf267DoFTjmhqxh3nD9HrYV8Url9nqSLBuPrnGfM?= =?us-ascii?Q?bCFLWfeBSpxEcFK9/ejd8LD8H+ezvAoe41Ha4Ie18vcf1qfjs0AQJ66loqqi?= =?us-ascii?Q?lTQBKeSEUDUpukCrKIw=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(82310400026)(376014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Dec 2025 11:13:58.8176 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9a63c901-f0b9-4a91-455b-08de3c9435da X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002317.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA4PR12MB9761 Content-Type: text/plain; charset="utf-8" The global variable 'khugepaged_collapse_control' is not used outside of mm/khugepaged.c. Make it static to limit its scope. Signed-off-by: Shivank Garg Acked-by: David Hildenbrand (Red Hat) Reviewed-by: Wei Yang --- mm/khugepaged.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 65b1b778378a..d130357a2d88 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -829,7 +829,7 @@ static void khugepaged_alloc_sleep(void) remove_wait_queue(&khugepaged_wait, &wait); } =20 -struct collapse_control khugepaged_collapse_control =3D { +static struct collapse_control khugepaged_collapse_control =3D { .is_khugepaged =3D true, }; =20 --=20 2.43.0