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From:   Jens Axboe <axboe@kernel.dk>
To:     Christoph Hellwig <hch@infradead.org>,
        David Hildenbrand <david@redhat.com>,
        Lorenzo Stoakes <lstoakes@gmail.com>,
        David Howells <dhowells@redhat.com>
Cc:     Al Viro <viro@zeniv.linux.org.uk>,
        Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
        Jeff Layton <jlayton@kernel.org>,
        Logan Gunthorpe <logang@deltatee.com>,
        Hillf Danton <hdanton@sina.com>,
        Christian Brauner <brauner@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Jason Gunthorpe <jgg@ziepe.ca>
In-Reply-To: <20230526214142.958751-1-dhowells@redhat.com>
References: <20230526214142.958751-1-dhowells@redhat.com>
Subject: Re: [PATCH v4 0/3] block: Make old dio use
 iov_iter_extract_pages() and page pinning
Message-Id: <168554811322.183150.13490236053670818511.b4-ty@kernel.dk>
Date:   Wed, 31 May 2023 09:48:33 -0600
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On Fri, 26 May 2023 22:41:39 +0100, David Howells wrote:
> Here are three patches that go on top of the similar patches for bio
> structs now in the block tree that make the old block direct-IO code use
> iov_iter_extract_pages() and page pinning.
> 
> There are three patches:
> 
>  (1) Make page pinning neither add nor remove a pin to/from a ZERO_PAGE,
>      thereby allowing the dio code to insert zero pages in the middle of
>      dealing with pinned pages.  This also mitigates a potential problem
>      whereby userspace could force the overrun the pin counter of a zero
>      page.
> 
> [...]

Applied, thanks!

[1/3] mm: Don't pin ZERO_PAGE in pin_user_pages()
      commit: c8070b78751955e59b42457b974bea4a4fe00187
[2/3] mm: Provide a function to get an additional pin on a page
      commit: 1101fb8f89e5fc548c4d0ad66750e98980291815
[3/3] block: Use iov_iter_extract_pages() and page pinning in direct-io.c
      commit: 1ccf164ec866cb8575ab9b2e219fca875089c60e

Best regards,
-- 
Jens Axboe