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 pekiRePI K7S6pZXivIpP1OETUh67Z5RjOeSrpyHvscpG5ug7+7hvclp9Y727a5rOH/Ma9HkXJOO5VHL5OhBQDTz7qyDmeowOGe65tQIRPF+YFoeIxl6Hv0EMtxAQqAiNZxMNP+kqbj9aqq4ESjyZce/5GwAFKLtOSMbKrnbDl9BmhLDTd531imebawsRtN5mFVpEaKwrU90H70r7MdckpNvKA2UtYl1AxxgFuXCffUbp7vxvjarvCIPlciHotmPh5JnQzAAcJSImfk/1NaxgjRj10iJvncXEcdOEyAhOkM5cE6CmgT+bc2TlvI7xqvflB3ehPk+oyi008S2nYvCvSqXmaYI5TShQCGn+FZkLdpUi0x+6hac6WFz217Dhfcf9xjVW8IXvG7EQjPSZ21N/WIdGK1/NKjffcYaEWMYSTozDDasUdmJMELflbIn17j9sHSDMTqowNe+OuadFAhSUvjeo+vU1NsxkA8Q== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 27 Apr 2026, at 23:33, zhen.ni wrote: > =E5=9C=A8 2026/4/27 23:35, Zi Yan =E5=86=99=E9=81=93: >> 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. >> > > > Thanks for your review and suggestion. > > I kept the 3-patch structure mainly for clear functional separation, > which also makes review easier. Patch 1 adds the infrastructure, What is the point of adding unused code in a separate patch? Patch 1 has no functional addition and should be part of Patch 2. > patch 2 adds print_mode filter, and patch 3 adds NUMA filter. > > I discussed this with Andrew and he has already accepted the > current 3-patch structure into mm-new for testing. Since he's okay > with it and mentioned that bisection holes are acceptable in this The patches are still in mm-new, not mm-stable. It is totally acceptable to reorganize them. > case, I'll keep the current structure in v3. Please refrain from posting a new version when the discussion is still going on. > >>> >>> 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 | >>> --=20 >>> 2.20.1 >> >> >> Best Regards, >> Yan, Zi >> >> > Best regards, > Zhen Best Regards, Yan, Zi