Re: [PATCH v3 1/1] iommu/sva: Invalidate KVA range on kernel TLB flush

On Wed, Aug 06, 2025 at 09:34:12AM -0700, Dave Hansen wrote:

struct kernel_pgtable_work { struct list_head list; spinlock_t lock; struct work_struct work; } kernel_pte_work;

pte_free_kernel() { struct page *page = ptdesc_magic();

guard(spinlock)(&kernel_pte_work.lock); list_add(&page->list, &kernel_pte_work.list); schedule_work(&kernel_pte_work.work); }

Oh, OK, yeah this can work

The only wrinkle is that pte_free_kernel() itself still has a pte and 'ptdesc', not a 'struct page'. But there is ptdesc->pt_list, which should be unused at this point, especially for non-pgd pages on x86.

It should all be ptdesc, so lets avoid a struct page here and use the pt_list instead..

Jason