Re: [PATCH] x86/64/mm: Map all kernel memory into trampoline_pgd

[Joerg Roedel]

Hi Mike,

On Tue, Sep 14, 2021 at 10:52:39AM +0300, Mike Rapoport wrote:
> On Mon, Sep 13, 2021 at 11:52:36AM +0200, Joerg Roedel wrote:
> > +	for (i = pgd_index(__PAGE_OFFSET); i < PTRS_PER_PGD; i++)
> > +		trampoline_pgd[i] = init_top_pgt[i].pgd;
> 
> Don't we need to update the trampoline_pgd in sync_global_pgds() as well?

No, the trampoline_pgd is setup after preallocate_vmalloc_pages(), so
everything that would need synchronization is already in the reference
page-table.

Regards,

	Joerg