On Thu, Sep 14, 2023 at 10:56 AM Matthew Wilcox wrote:
>
> On Thu, Sep 14, 2023 at 08:26:11AM -0700, Suren Baghdasaryan wrote:
> > From: Andrea Arcangeli
> >
> > As far as the rmap code is concerned, UFFDIO_REMAP only alters the
> > page->mapping and page->index. It does it while holding the page
On Thu, Sep 14, 2023 at 08:26:11AM -0700, Suren Baghdasaryan wrote:
> From: Andrea Arcangeli
>
> As far as the rmap code is concerned, UFFDIO_REMAP only alters the
> page->mapping and page->index. It does it while holding the page
folio->mapping and folio->index. It does it while holding the fo
From: Andrea Arcangeli
As far as the rmap code is concerned, UFFDIO_REMAP only alters the
page->mapping and page->index. It does it while holding the page
lock. However folio_referenced() is doing rmap walks without taking the
folio lock first, so folio_lock_anon_vma_read() must be updated to
re-
