Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool

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To: Jerome Glisse <jglisse@xxxxxxxxxx>
Subject: Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool
From: Christoph Hellwig <hch@xxxxxx>
Date: Thu, 1 Aug 2019 10:20:04 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, john.hubbard@xxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>, Anna Schumaker <anna.schumaker@xxxxxxxxxx>, "David S . Miller" <davem@xxxxxxxxxxxxx>, Dominique Martinet <asmadeus@xxxxxxxxxxxxx>, Eric Van Hensbergen <ericvh@xxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Jason Wang <jasowang@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Latchesar Ionkov <lucho@xxxxxxxxxx>, "Michael S . Tsirkin" <mst@xxxxxxxxxx>, Miklos Szeredi <miklos@xxxxxxxxxx>, Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, linux-mm@xxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>, ceph-devel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-cifs@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, samba-technical@xxxxxxxxxxxxxxx, v9fs-developer@xxxxxxxxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, John Hubbard <jhubbard@xxxxxxxxxx>, Minwoo Im <minwoo.im.dev@xxxxxxxxx>
In-reply-to: <20190730155702.GB10366@redhat.com>
User-agent: Mutt/1.5.17 (2007-11-01)

On Tue, Jul 30, 2019 at 11:57:02AM -0400, Jerome Glisse wrote:
> Other user can also add page that are not coming from GUP but need to
> have a reference see __blkdev_direct_IO()

Except for the zero page case I mentioned in my last mail explicitly,
and the KVEC/PIPE type iov vecs from the original mail what other
pages do you see to get added?

References:
- [PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
  - From: john . hubbard
- [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool
  - From: john . hubbard
- Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool
  - From: Christoph Hellwig
- Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool
  - From: Jerome Glisse
- Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool
  - From: Christoph Hellwig
- Re: [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool
  - From: Jerome Glisse

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