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From: Jerome Glisse <jglisse@redhat.com>
To: Boaz Harrosh <boaz@plexistor.com>
Cc: "Boaz Harrosh" <openosd@gmail.com>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Kent Overstreet" <kent.overstreet@gmail.com>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	linux-block@vger.kernel.org, "Linux MM" <linux-mm@kvack.org>,
	"John Hubbard" <jhubbard@nvidia.com>, "Jan Kara" <jack@suse.cz>,
	"Alexander Viro" <viro@zeniv.linux.org.uk>,
	"Johannes Thumshirn" <jthumshirn@suse.de>,
	"Christoph Hellwig" <hch@lst.de>, "Jens Axboe" <axboe@kernel.dk>,
	"Ming Lei" <ming.lei@redhat.com>,
	"Jason Gunthorpe" <jgg@ziepe.ca>,
	"Matthew Wilcox" <willy@infradead.org>,
	"Steve French" <sfrench@samba.org>,
	linux-cifs@vger.kernel.org, "Yan Zheng" <zyan@redhat.com>,
	"Sage Weil" <sage@redhat.com>,
	"Ilya Dryomov" <idryomov@gmail.com>,
	"Alex Elder" <elder@kernel.org>,
	ceph-devel@vger.kernel.org,
	"Eric Van Hensbergen" <ericvh@gmail.com>,
	"Latchesar Ionkov" <lucho@ionkov.net>,
	"Mike Marshall" <hubcap@omnibond.com>,
	"Martin Brandenburg" <martin@omnibond.com>,
	"Dominique Martinet" <asmadeus@codewreck.org>,
	v9fs-developer@lists.sourceforge.net, "Coly Li" <colyli@suse.de>,
	linux-bcache@vger.kernel.org,
	"Ernesto A. Fernández" <ernesto.mnd.fernandez@gmail.com>
Subject: Re: [PATCH v1 00/15] Keep track of GUPed pages in fs and block
Date: Wed, 17 Apr 2019 17:19:43 -0400	[thread overview]
Message-ID: <20190417211943.GA24523@redhat.com> (raw)
In-Reply-To: <20190417020345.GB3330@redhat.com>

On Tue, Apr 16, 2019 at 10:03:45PM -0400, Jerome Glisse wrote:
> On Wed, Apr 17, 2019 at 04:11:03AM +0300, Boaz Harrosh wrote:
> > On 17/04/19 02:16, Jerome Glisse wrote:
> > > On Wed, Apr 17, 2019 at 01:09:22AM +0300, Boaz Harrosh wrote:
> > >> On 16/04/19 22:57, Jerome Glisse wrote:

[...]

> > >>
> > >> BTW: Are you aware of the users of iov_iter_get_pages_alloc() Do they need fixing too?
> > > 
> > > Yeah and that patchset should address those already, i do not think
> > > i missed any.
> > > 
> > 
> > I could not find a patch for nfs/direct.c where a put_page is called
> > to balance the iov_iter_get_pages_alloc(). Which takes care of for example of
> > the blocklayout.c pages state
> > 
> > So I think the deep Audit needs to be for iov_iter_get_pages and get_user_pages
> > and the balancing of that. And the all of bio_alloc and bio_add_page should stay
> > agnostic to any pege-refs taking/putting
> 
> Will try to get started on that and see if i hit any roadblock. I will
> report once i get my feet wet, or at least before i drown ;)

So far it does not look too bad:

https://cgit.freedesktop.org/~glisse/linux/log/?h=gup-bio-v2

they are few things that will be harder to fit in like splice
and pipe that are populated from GUP.

Cheers,
Jérôme

  reply	other threads:[~2019-04-17 21:20 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11 21:08 [PATCH v1 00/15] Keep track of GUPed pages in fs and block jglisse
2019-04-11 21:08 ` [PATCH v1 01/15] fs/direct-io: fix trailing whitespace issues jglisse
2019-04-11 21:08 ` [PATCH v1 02/15] iov_iter: add helper to test if an iter would use GUP jglisse
2019-04-11 21:08 ` [PATCH v1 03/15] block: introduce bvec_page()/bvec_set_page() to get/set bio_vec.bv_page jglisse
2019-04-11 21:08 ` [PATCH v1 04/15] block: introduce BIO_VEC_INIT() macro to initialize bio_vec structure jglisse
2019-04-11 21:08 ` [PATCH v1 05/15] block: replace all bio_vec->bv_page by bvec_page()/bvec_set_page() jglisse
2019-04-11 21:08 ` [PATCH v1 06/15] block: convert bio_vec.bv_page to bv_pfn to store pfn and not page jglisse
2019-04-11 21:08 ` [PATCH v1 07/15] block: add bvec_put_page_dirty*() to replace put_page(bvec_page()) jglisse
2019-04-11 21:08 ` [PATCH v1 08/15] block: use bvec_put_page() instead of put_page(bvec_page()) jglisse
2019-04-11 21:08 ` [PATCH v1 09/15] block: bvec_put_page_dirty* instead of set_page_dirty* and bvec_put_page jglisse
2019-04-11 21:08 ` [PATCH v1 10/15] block: add gup flag to bio_add_page()/bio_add_pc_page()/__bio_add_page() jglisse
2019-04-15 14:59   ` Jan Kara
2019-04-15 15:24     ` Jerome Glisse
2019-04-16 16:46       ` Jan Kara
2019-04-16 16:54         ` Dan Williams
2019-04-16 17:07         ` Jerome Glisse
2019-04-16  0:22     ` Jerome Glisse
2019-04-16 16:52       ` Jan Kara
2019-04-16 18:32         ` Jerome Glisse
2019-04-11 21:08 ` [PATCH v1 11/15] block: make sure bio_add_page*() knows page that are coming from GUP jglisse
2019-04-11 21:08 ` [PATCH v1 12/15] fs/direct-io: keep track of wether a page is coming from GUP or not jglisse
2019-04-11 23:14   ` Dave Chinner
2019-04-12  0:08     ` Jerome Glisse
2019-04-11 21:08 ` [PATCH v1 13/15] fs/splice: use put_user_page() when appropriate jglisse
2019-04-11 21:08 ` [PATCH v1 14/15] fs: use bvec_set_gup_page() where appropriate jglisse
2019-04-11 21:08 ` [PATCH v1 15/15] ceph: use put_user_pages() instead of ceph_put_page_vector() jglisse
2019-04-15  7:46   ` Yan, Zheng
2019-04-15 15:11     ` Jerome Glisse
2019-04-16  0:00 ` [PATCH v1 00/15] Keep track of GUPed pages in fs and block Dave Chinner
     [not found] ` <2c124cc4-b97e-ee28-2926-305bc6bc74bd@plexistor.com>
2019-04-16 18:47   ` Jerome Glisse
2019-04-16 18:59   ` Kent Overstreet
2019-04-16 19:12     ` Dan Williams
2019-04-16 19:49       ` Jerome Glisse
2019-04-17 21:53         ` Dan Williams
2019-04-17 22:28           ` Jerome Glisse
2019-04-17 23:32             ` Dan Williams
2019-04-18 10:42             ` Jan Kara
2019-04-18 14:27               ` Jerome Glisse
2019-04-18 15:30                 ` Jan Kara
2019-04-18 15:36                   ` Jerome Glisse
2019-04-18 18:03               ` Dan Williams
     [not found]       ` <ccac6c5a-7120-0455-88de-ca321b01e825@plexistor.com>
2019-04-16 19:57         ` Jerome Glisse
     [not found]           ` <41e2d7e1-104b-a006-2824-015ca8c76cc8@gmail.com>
2019-04-16 23:16             ` Jerome Glisse
     [not found]               ` <fa00a2ff-3664-3165-7af8-9d9c53238245@plexistor.com>
2019-04-17  2:03                 ` Jerome Glisse
2019-04-17 21:19                   ` Jerome Glisse [this message]
2019-04-16 23:34             ` Jerome Glisse
2019-04-17 21:54         ` Dan Williams

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