From: Linus Torvalds <torvalds@linux-foundation.org>
To: David Howells <dhowells@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>,
David Hildenbrand <david@redhat.com>,
Jens Axboe <axboe@kernel.dk>, Al Viro <viro@zeniv.linux.org.uk>,
Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
Jeff Layton <jlayton@kernel.org>,
Jason Gunthorpe <jgg@nvidia.com>,
Logan Gunthorpe <logang@deltatee.com>,
Hillf Danton <hdanton@sina.com>,
Christian Brauner <brauner@kernel.org>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC PATCH v2 2/3] mm: Provide a function to get an additional pin on a page
Date: Thu, 25 May 2023 19:29:21 -0700 [thread overview]
Message-ID: <CAHk-=win3ttfr2xb1JcGroPSOoqGs0GooZq0DLsRtZzXUH5YeQ@mail.gmail.com> (raw)
In-Reply-To: <20230525223953.225496-3-dhowells@redhat.com>
On Thu, May 25, 2023 at 3:40 PM David Howells <dhowells@redhat.com> wrote:
>
> +void page_get_additional_pin(struct page *page)
> +{
> + struct folio *folio = page_folio(page);
> +
> + if (page == ZERO_PAGE(0))
> + return;
You added that nice "is_zero_folio()", and then you did the above anyway..
Linus
next prev parent reply other threads:[~2023-05-26 2:29 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-25 22:39 [RFC PATCH v2 0/3] block: Make old dio use iov_iter_extract_pages() and page pinning David Howells
2023-05-25 22:39 ` [RFC PATCH v2 1/3] mm: Don't pin ZERO_PAGE in pin_user_pages() David Howells
2023-05-26 8:10 ` Lorenzo Stoakes
2023-05-26 8:17 ` Christoph Hellwig
2023-05-26 8:22 ` Christoph Hellwig
2023-05-26 8:27 ` Lorenzo Stoakes
2023-05-26 8:29 ` David Howells
2023-05-26 8:43 ` David Howells
2023-05-26 8:58 ` Lorenzo Stoakes
2023-05-26 9:15 ` David Howells
2023-05-26 9:23 ` Lorenzo Stoakes
2023-05-26 9:24 ` David Hildenbrand
2023-05-25 22:39 ` [RFC PATCH v2 2/3] mm: Provide a function to get an additional pin on a page David Howells
2023-05-26 2:29 ` Linus Torvalds [this message]
2023-05-26 5:50 ` David Howells
2023-05-26 8:20 ` Christoph Hellwig
2023-05-26 8:31 ` David Howells
2023-05-25 22:39 ` [RFC PATCH v2 3/3] block: Use iov_iter_extract_pages() and page pinning in direct-io.c David Howells
2023-05-26 8:26 ` Christoph Hellwig
2023-05-26 8:33 ` David Howells
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