lkml.org 
[lkml]   [2024]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: bio_vec, bv_page and folios
On Tue, Jan 02, 2024 at 10:03:58AM +0000, David Howells wrote:
> Matthew Wilcox <willy@infradead.org> wrote:
>
> > On Tue, Jan 02, 2024 at 08:56:46AM +0000, David Howells wrote:
> > > Hi Christoph, Willy,
> > >
> > > Will bv_page in struct bio_vec ever become a folio pointer rather than I page
> > > pointer? I'm guessing not as it still presumably needs to be able to point to
> > > non-folio pages.
> >
> > My plan for bio_vec is that it becomes phyr -- a physical address +
> > length. No more page or folio reference.
>
> Interesting... What does that mean for those places that currently use
> bv_page as a place to stash a pointer to the page and use it to clean up the
> page later?

I don't intend to get rid of bio_for_each_folio_all() or bio_add_page()
for example. It's just a phys_to_page() away. The advantage is that
we wouldn't need a struct page to do I/O to a physical address.

\
 
 \ /
  Last update: 2024-01-02 11:25    [W:0.040 / U:1.488 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site