Re: [PATCH 1/2] mm: vmalloc: streamline vmalloc memory accounting

[Shakeel Butt <shakeel.butt@linux.dev>]

On Fri, Feb 20, 2026 at 02:10:34PM -0500, Johannes Weiner wrote:
[...]
>  static struct vmap_area *__find_vmap_area(unsigned long addr, struct rb_root *root)
>  {
>  	struct rb_node *n = root->rb_node;
> @@ -3463,11 +3457,11 @@ void vfree(const void *addr)
>  		 * High-order allocs for huge vmallocs are split, so
>  		 * can be freed as an array of order-0 allocations
>  		 */
> +		if (!(vm->flags & VM_MAP_PUT_PAGES))
> +			dec_node_page_state(page, NR_VMALLOC);
>  		__free_page(page);
>  		cond_resched();
>  	}
> -	if (!(vm->flags & VM_MAP_PUT_PAGES))
> -		atomic_long_sub(vm->nr_pages, &nr_vmalloc_pages);
>  	kvfree(vm->pages);
>  	kfree(vm);
>  }
> @@ -3655,6 +3649,8 @@ vm_area_alloc_pages(gfp_t gfp, int nid,
>  			continue;
>  		}
>  
> +		mod_node_page_state(page, NR_VMALLOC, 1 << large_order);

mod_node_page_state() takes 'struct pglist_data *pgdat', you need to use
page_pgdat(page) as first param.

> +
>  		split_page(page, large_order);
>  		for (i = 0; i < (1U << large_order); i++)
>  			pages[nr_allocated + i] = page + i;
> @@ -3675,6 +3671,7 @@ vm_area_alloc_pages(gfp_t gfp, int nid,
>  	if (!order) {
>  		while (nr_allocated < nr_pages) {
>  			unsigned int nr, nr_pages_request;
> +			int i;
>  
>  			/*
>  			 * A maximum allowed request is hard-coded and is 100
> @@ -3698,6 +3695,9 @@ vm_area_alloc_pages(gfp_t gfp, int nid,
>  							nr_pages_request,
>  							pages + nr_allocated);
>  
> +			for (i = nr_allocated; i < nr_allocated + nr; i++)
> +				inc_node_page_state(pages[i], NR_VMALLOC);
> +
>  			nr_allocated += nr;
>  
>  			/*
> @@ -3722,6 +3722,8 @@ vm_area_alloc_pages(gfp_t gfp, int nid,
>  		if (unlikely(!page))
>  			break;
>  
> +		mod_node_page_state(page, NR_VMALLOC, 1 << order);

Same here.

With above fixes, you can add:

Acked-by: Shakeel Butt <shakeel.butt@linux.dev>