From: John Hubbard <jhubbard@nvidia.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: <john.hubbard@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Anna Schumaker <anna.schumaker@netapp.com>,
"David S . Miller" <davem@davemloft.net>,
Dominique Martinet <asmadeus@codewreck.org>,
Eric Van Hensbergen <ericvh@gmail.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Jason Wang <jasowang@redhat.com>,
Jens Axboe <axboe@kernel.dk>, Latchesar Ionkov <lucho@ionkov.net>,
"Michael S . Tsirkin" <mst@redhat.com>,
Miklos Szeredi <miklos@szeredi.hu>,
Trond Myklebust <trond.myklebust@hammerspace.com>,
Christoph Hellwig <hch@lst.de>,
Matthew Wilcox <willy@infradead.org>, <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>, <ceph-devel@vger.kernel.org>,
<kvm@vger.kernel.org>, <linux-block@vger.kernel.org>,
<linux-cifs@vger.kernel.org>, <linux-fsdevel@vger.kernel.org>,
<linux-nfs@vger.kernel.org>, <linux-rdma@vger.kernel.org>,
<netdev@vger.kernel.org>, <samba-technical@lists.samba.org>,
<v9fs-developer@lists.sourceforge.net>,
<virtualization@lists.linux-foundation.org>
Subject: Re: [PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*()
Date: Tue, 6 Aug 2019 23:38:59 -0700 [thread overview]
Message-ID: <3ab1e69f-88c6-3e16-444d-cab78c3bf1d1@nvidia.com> (raw)
In-Reply-To: <20190807063448.GA6002@infradead.org>
On 8/6/19 11:34 PM, Christoph Hellwig wrote:
> On Mon, Aug 05, 2019 at 03:54:35PM -0700, John Hubbard wrote:
>> On 7/23/19 11:17 PM, Christoph Hellwig wrote:
...
>>> I think we can do this in a simple and better way. We have 5 ITER_*
>>> types. Of those ITER_DISCARD as the name suggests never uses pages, so
>>> we can skip handling it. ITER_PIPE is rejected іn the direct I/O path,
>>> which leaves us with three.
>>>
>>
>> Hi Christoph,
>>
>> Are you working on anything like this?
>
> I was hoping I could steer you towards it. But if you don't want to do
> it yourself I'll add it to my ever growing todo list.
>
Sure, I'm up for this. The bvec-related items are the next logical part
of the gup/dma conversions to work on, and I just wanted to avoid solving the
same problem if you were already in the code.
>> Or on the put_user_bvec() idea?
>
> I have a prototype from two month ago:
>
> http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/gup-bvec
>
> but that only survived the most basic testing, so it'll need more work,
> which I'm not sure when I'll find time for.
>
I'll take a peek, and probably pester you with a few questions if I get
confused. :)
thanks,
--
John Hubbard
NVIDIA
next prev parent reply other threads:[~2019-08-07 6:40 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 4:25 [PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*() john.hubbard
2019-07-24 4:25 ` [PATCH 01/12] mm/gup: add make_dirty arg to put_user_pages_dirty_lock() john.hubbard
2019-07-24 4:25 ` [PATCH 02/12] iov_iter: add helper to test if an iter would use GUP v2 john.hubbard
2019-07-24 4:25 ` [PATCH 03/12] block: bio_release_pages: use flags arg instead of bool john.hubbard
2019-07-24 5:30 ` Christoph Hellwig
2019-07-29 20:57 ` Jerome Glisse
2019-07-30 10:25 ` Christoph Hellwig
2019-07-30 15:57 ` Jerome Glisse
2019-08-01 8:20 ` Christoph Hellwig
2019-07-24 4:25 ` [PATCH 04/12] block: bio_release_pages: convert put_page() to put_user_page*() john.hubbard
2019-07-24 4:25 ` [PATCH 05/12] block_dev: " john.hubbard
2019-07-24 4:25 ` [PATCH 06/12] fs/nfs: " john.hubbard
2019-07-24 4:25 ` [PATCH 07/12] vhost-scsi: " john.hubbard
2019-07-24 4:34 ` John Hubbard
2019-07-24 8:07 ` Michael S. Tsirkin
2019-07-24 4:25 ` [PATCH 08/12] fs/cifs: " john.hubbard
2019-07-24 4:25 ` [PATCH 09/12] fs/fuse: " john.hubbard
2019-07-24 4:25 ` [PATCH 10/12] fs/ceph: " john.hubbard
2019-07-24 4:25 ` [PATCH 11/12] 9p/net: " john.hubbard
2019-07-24 4:25 ` [PATCH 12/12] fs/ceph: fix a build warning: returning a value from void function john.hubbard
2019-07-24 6:17 ` [PATCH 00/12] block/bio, fs: convert put_page() to put_user_page*() Christoph Hellwig
2019-07-24 23:23 ` John Hubbard
2019-08-05 22:54 ` John Hubbard
2019-08-07 6:34 ` Christoph Hellwig
2019-08-07 6:38 ` John Hubbard [this message]
2019-07-25 0:41 ` Bob Liu
2019-07-26 1:24 ` John Hubbard
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