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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?B1vLdR66+KG5gJklNRdtTSQ0FF1NGcx9blxLOXCDtuvdvcCR/G1hTgu03zn2?= =?us-ascii?Q?L7ml4X4ruWQK64qjzSKNDDH+5NOR2qMRNl5jMzab59ualpGIFoXvNPAax9H9?= =?us-ascii?Q?b7RBELiJOLUSNSeW9WVkYOeOv3NuOV0wkGvHOAa5UfP3FDvE4uArOpIS3Otu?= =?us-ascii?Q?zCEw1q0u7JrLRvyPv7BWUYGbg1Y1xUD4p06fAeOqhLoCN29C+ESMvlMAfY8l?= =?us-ascii?Q?RJOeJ9mFokYkTcUnn/pwyDPmf4IRks8Zx4Qn86/HMaJAFcUu8oUlgqM06pC3?= =?us-ascii?Q?HAlrLr7A90O6OCAfqMjBVK2n5TQluwHvL2RVj6P4GaaasE1wfL6tgfPu7jIv?= =?us-ascii?Q?T56FrVmE3Kpz6+jiCnAkR7RCSaT8qUcYOWGoua/XtoMCUVpJRZoqrSgMMUwg?= =?us-ascii?Q?Qw8fDKQ7odPJ+wdrnmX22x/d+xnntOnXAVFng/3DHCcjR8AebnBkTXOIlQNv?= =?us-ascii?Q?mzQNLHgaDofFEjNJYcf0yw5wLitEnQMjuM4QjMVQkp7jTiq8pGjpnhl3Zk9p?= =?us-ascii?Q?gTp52QmzooINEglaefjMymf/+ITZ+f1VyWUxhM7pmHZoM49qvbq5mXK6MSCQ?= =?us-ascii?Q?9zJt/tnsbiBK/U791IAb57bGekd+UNA2918PGSEBOasuX1P6lPFyMt8ZnjP3?= =?us-ascii?Q?jPMTs6+TjK22rQMKyQBJ/rKVyNszn49jsy6EtMJokal2eU4KnLs1gL3dk12p?= =?us-ascii?Q?FOay9B5LAkqOkQ9Sq76KEb7hEr6gKDTGcE48j8riQCYLCdyBwlcPZclN9XWz?= =?us-ascii?Q?NFhCYSrsORz7bCrl/Hta5ofrATlIgKOGXbxaTZgHXT68Rbx3yR7utAEFppek?= =?us-ascii?Q?eDqAcjVC0vsIdB0BYQHuDCK/viS4fZZ9YSPkBCUQk+zE9dhzGnjmcHIxNrV9?= =?us-ascii?Q?CWg7OwDlrmbcTEvzsu/iIH/fU114ZFkQZzVVIanGF990Oy7nIMFLIu0FBLUI?= =?us-ascii?Q?P+rFiQVwioz8OAR58nB18Y0W/wBCraJ2eTANQiC0XqwRfN426hxSn7g7b4WN?= =?us-ascii?Q?RF1g7A0yoi8fiVHbnZYlcjD8kLxboSm8xa3U2tfUC7o9D5z/7SMrqS+1nhTU?= =?us-ascii?Q?u2UMowWXaQI8kK+lVOGPvCgHr0xCHTxatNhRF5Q3vpoWnxsZU+U43IW0n8Ss?= =?us-ascii?Q?2tfJh5TAawcnH8dyZspXoDN7VaJV/B/p0czF+bjp+Krj2B2Xs+aft/YEh2cB?= =?us-ascii?Q?5gjHYZxLsjEwbHp13hfgXh6kD8vTONWEYNbiTL6HzsBz2mBZLwouVilcmojG?= =?us-ascii?Q?x8RMJxp+XNbIOApwBbevfR84Z/qpU6mrSpM5FQN5pceYTYfm42L6dcG824Mx?= =?us-ascii?Q?tsFghb0iIIwHDk8P3T11ThdmsB+/LtKUjyxcA8iPnrrC7Gy19X/3SoBGNWbE?= =?us-ascii?Q?CcSHtzzNSxbTa49PzyDGNs3rISYcQVZpOU19MJMadyNPyg/DlDviADC7URyb?= =?us-ascii?Q?hpSlq+o9kSucFVU0YhgFi01JJoRF4mnMgvPGysupgPse/+yIrtLBitR+YJBh?= =?us-ascii?Q?1SN83W2Eg+SE1FmO+cSmJM3qFKNW+uETbr8KY4dDRvM+r1/t/Sjrq4ek/527?= =?us-ascii?Q?PEOqQqxptRUpBs1/Co6fRMl4FUKUfv9MHkMGXOyo1EQVCFe1CCwTn9TShs3e?= =?us-ascii?Q?qcRrq8JuR/eBC11lRze69UET8omHEhW6nGihINWQU4FIeGo02HXRORzVLlG2?= =?us-ascii?Q?sDr53WIWJS3hU6B8IlqDbIkqN+zO9dgv07yeNfC1atVWyudR?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: f90ae980-8858-4ce9-e2d1-08dea4729d48 X-MS-Exchange-CrossTenant-AuthSource: DS7PR12MB9473.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Apr 2026 15:35:30.6677 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: vG5AoajnFQb7dVUI7HHSkGoTKgeMub+KtF5UtbYI4pWwgevR4LwEVuaDn9lpeZEg X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS4PR12MB9681 On 19 Apr 2026, at 11:55, Zhen Ni wrote: > Add data structure for page_owner filtering functionality and create > debugfs directory for filter controls. > > This adds: > - enum page_owner_print_mode with values for full_stack and stack_handl= e > - struct page_owner_filter with print_mode and nid_mask fields > - Static owner_filter instance initialized with default values > - page_owner_filter debugfs directory > > The filter infrastructure will be used to add print_mode and NUMA node > filtering capabilities in subsequent commits. > > Link: https://lore.kernel.org/linux-mm/20260417154638.22370-2-zhen.ni@e= asystack.cn/ > Suggested-by: Zi Yan > Signed-off-by: Zhen Ni > --- > > Changes in v2: > - Use enum page_owner_print_mode instead of bool 'compact' for better c= larity > - Use nodemask_t instead of int 'nid' to support multi-node filtering > --- > mm/page_owner.c | 20 +++++++++++++++++++- > 1 file changed, 19 insertions(+), 1 deletion(-) The patch can be folded into Patch 2. Otherwise, these new types are not used and page_owner_filter folder is just empty. > > diff --git a/mm/page_owner.c b/mm/page_owner.c > index 8178e0be557f..5884d883837e 100644 > --- a/mm/page_owner.c > +++ b/mm/page_owner.c > @@ -54,6 +54,21 @@ struct stack_print_ctx { > u8 flags; > }; > > +enum page_owner_print_mode { > + PAGE_OWNER_PRINT_FULL_STACK, > + PAGE_OWNER_PRINT_STACK_HANDLE, > +}; > + > +struct page_owner_filter { > + enum page_owner_print_mode print_mode; > + nodemask_t nid_mask; > +}; > + > +static struct page_owner_filter owner_filter =3D { > + .print_mode =3D PAGE_OWNER_PRINT_FULL_STACK, > + .nid_mask =3D NODE_MASK_NONE, > +}; > + > static bool page_owner_enabled __initdata; > DEFINE_STATIC_KEY_FALSE(page_owner_inited); > > @@ -973,7 +988,7 @@ DEFINE_SIMPLE_ATTRIBUTE(page_owner_threshold_fops, = &page_owner_threshold_get, > > static int __init pageowner_init(void) > { > - struct dentry *dir; > + struct dentry *dir, *filter_dir; > > if (!static_branch_unlikely(&page_owner_inited)) { > pr_info("page_owner is disabled\n"); > @@ -981,6 +996,9 @@ static int __init pageowner_init(void) > } > > debugfs_create_file("page_owner", 0400, NULL, NULL, &page_owner_fops)= ; > + > + filter_dir =3D debugfs_create_dir("page_owner_filter", NULL); > + > dir =3D debugfs_create_dir("page_owner_stacks", NULL); > debugfs_create_file("show_stacks", 0400, dir, > (void *)(STACK_PRINT_FLAG_STACK | > -- = > 2.20.1 Best Regards, Yan, Zi