linux-kernel - Re: [PATCH 4/8] ceph: drop usage of page

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Date: Mon, 22 Apr 2024 23:34:40 +0800
From: Kairui Song <ryncsn@...il.com>
To: Xiubo Li <xiubli@...hat.com>
Cc: Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org, 
	Andrew Morton <akpm@...ux-foundation.org>, "Huang, Ying" <ying.huang@...el.com>, 
	Chris Li <chrisl@...nel.org>, Barry Song <v-songbaohua@...o.com>, 
	Ryan Roberts <ryan.roberts@....com>, Neil Brown <neilb@...e.de>, Minchan Kim <minchan@...nel.org>, 
	Hugh Dickins <hughd@...gle.com>, David Hildenbrand <david@...hat.com>, Yosry Ahmed <yosryahmed@...gle.com>, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Ilya Dryomov <idryomov@...il.com>, Jeff Layton <jlayton@...nel.org>, ceph-devel@...r.kernel.org
Subject: Re: [PATCH 4/8] ceph: drop usage of page_index

On Thu, Apr 18, 2024 at 9:40 AM Xiubo Li <xiubli@...hat.com> wrote:
> On 4/18/24 09:30, Matthew Wilcox wrote:
> > On Thu, Apr 18, 2024 at 08:28:22AM +0800, Xiubo Li wrote:
> >> Thanks for you patch and will it be doable to switch to folio_index()
> >> instead ?
> > No.  Just use folio->index.  You only need folio_index() if the folio
> > might belong to the swapcache instead of a file.
> >
> Hmm, Okay.
>
> Thanks
>
> - Xiubo
>

Hi Xiubo

Thanks for the comment,

As Matthew mentioned there is no need to use folio_index unless you
are access swapcache. And I found that ceph is not using folios
internally yet, needs a lot of conversions. So I think I'll just keep
using page->index here, later conversions may change it to
folio->index.