linux-kernel - Re: [RFC PATCH v2 2/3] mm: Provide a function to get an additional pin on a page

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Message-ID: <520385.1685089889@warthog.procyon.org.uk>
Date:   Fri, 26 May 2023 09:31:29 +0100
From:   David Howells <dhowells@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     dhowells@...hat.com, David Hildenbrand <david@...hat.com>,
        Jens Axboe <axboe@...nel.dk>,
        Al Viro <viro@...iv.linux.org.uk>,
        Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>,
        Jeff Layton <jlayton@...nel.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Hillf Danton <hdanton@...a.com>,
        Christian Brauner <brauner@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH v2 2/3] mm: Provide a function to get an additional pin on a page

Christoph Hellwig <hch@...radead.org> wrote:

> > +void page_get_additional_pin(struct page *page)
> 
> page_get_additional_pin seems like an odd name, mixing the get and
> pin terminologies.  What about repin_page?

I considered that, though repin_page() suggests putting a pin back in after
one is removed, but I can go with that if no one objects.

> Or move to a folio interface from the start can call it folio_repin?

I also considered this, but the entire gup interface is page-based at the
moment, but I can do that too:-/

David