Background we are discussing __replace_page() in:
kernel/events/uprobes.c
and wether this can be call on page that can be written too through
its virtual address mapping.
On Fri, Feb 01, 2019 at 07:50:22PM -0500, Andrea Arcangeli wrote:
> On Thu, Jan 31, 2019 at 01:37:03PM -0500, Jerome Gliss
On Thu, Jan 31, 2019 at 01:37:03PM -0500, Jerome Glisse wrote:
> @@ -207,8 +207,7 @@ static int __replace_page(struct vm_area_struct *vma,
> unsigned long addr,
>
> flush_cache_page(vma, addr, pte_pfn(*pvmw.pte));
> ptep_clear_flush_notify(vma, addr, pvmw.pte);
> - set_pte_at_not
From: Jérôme Glisse
Using set_pte_at_notify() trigger useless calls to change_pte() so just
use set_pte_at() instead. The reason is that set_pte_at_notify() should
only be use when going from either a read and write pte to read only pte
with same pfn, or from read only to read and write with a di
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