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From: Tejun Heo <tj@kernel.org>
To: Kent Overstreet <koverstreet@google.com>
Cc: linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org,
	dm-devel@redhat.com, vgoyal@redhat.com, mpatocka@redhat.com,
	bharrosh@panasas.com, Jens Axboe <axboe@kernel.dk>,
	NeilBrown <neilb@suse.de>, Alasdair Kergon <agk@redhat.com>,
	Jeff Garzik <jeff@garzik.org>
Subject: Re: [PATCH v7 7/9] block: Add bio_clone_bioset(), bio_clone_kmalloc()
Date: Fri, 31 Aug 2012 19:19:16 -0700	[thread overview]
Message-ID: <20120901021916.GD19535@dhcp-172-17-108-109.mtv.corp.google.com> (raw)
In-Reply-To: <20120828220532.GB1048@moria.home.lan>

Hello,

On Tue, Aug 28, 2012 at 03:05:32PM -0700, Kent Overstreet wrote:
> On Tue, Aug 28, 2012 at 01:44:01PM -0700, Tejun Heo wrote:
> > On Tue, Aug 28, 2012 at 10:37:34AM -0700, Kent Overstreet wrote:
> > > +static inline struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
> > > +{
> > > +	return bio_clone_bioset(bio, gfp_mask, fs_bio_set);
> > > +}
> > > +
> > ...
> > > +static inline struct bio *bio_clone_kmalloc(struct bio *bio, gfp_t gfp_mask)
> > > +{
> > > +	return bio_clone_bioset(bio, gfp_mask, NULL);
> > > +
> > > +}
> > 
> > Do we really need these wrappers?  I'd prefer requiring users to
> > explicit choose @bioset when cloning.
> 
> bio_clone() is an existing api, I agree but I'd prefer to convert
> existing users in a separate patch and when I do that I want to spend
> some time actually looking at the existing code instead of doing the
> conversion blindly (at least some of the existing users are incorrect
> and I'll have to add bio_sets for them).

Aren't there like three users in kernel?  If you wanna clean it up
later, that's fine too but I don't think it would make much difference
either way.

Thanks.

-- 
tejun

WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Kent Overstreet <koverstreet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Cc: linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	mpatocka-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	bharrosh-C4P08NqkoRlBDgjK7y7TUQ@public.gmane.org,
	Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
	NeilBrown <neilb-l3A5Bk7waGM@public.gmane.org>,
	Alasdair Kergon <agk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Jeff Garzik <jeff-o2qLIJkoznsdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH v7 7/9] block: Add bio_clone_bioset(), bio_clone_kmalloc()
Date: Fri, 31 Aug 2012 19:19:16 -0700	[thread overview]
Message-ID: <20120901021916.GD19535@dhcp-172-17-108-109.mtv.corp.google.com> (raw)
In-Reply-To: <20120828220532.GB1048-jC9Py7bek1znysI04z7BkA@public.gmane.org>

Hello,

On Tue, Aug 28, 2012 at 03:05:32PM -0700, Kent Overstreet wrote:
> On Tue, Aug 28, 2012 at 01:44:01PM -0700, Tejun Heo wrote:
> > On Tue, Aug 28, 2012 at 10:37:34AM -0700, Kent Overstreet wrote:
> > > +static inline struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
> > > +{
> > > +	return bio_clone_bioset(bio, gfp_mask, fs_bio_set);
> > > +}
> > > +
> > ...
> > > +static inline struct bio *bio_clone_kmalloc(struct bio *bio, gfp_t gfp_mask)
> > > +{
> > > +	return bio_clone_bioset(bio, gfp_mask, NULL);
> > > +
> > > +}
> > 
> > Do we really need these wrappers?  I'd prefer requiring users to
> > explicit choose @bioset when cloning.
> 
> bio_clone() is an existing api, I agree but I'd prefer to convert
> existing users in a separate patch and when I do that I want to spend
> some time actually looking at the existing code instead of doing the
> conversion blindly (at least some of the existing users are incorrect
> and I'll have to add bio_sets for them).

Aren't there like three users in kernel?  If you wanna clean it up
later, that's fine too but I don't think it would make much difference
either way.

Thanks.

-- 
tejun

  reply	other threads:[~2012-09-01  2:19 UTC|newest]

Thread overview: 128+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-28 17:37 [PATCH v7 0/9] Block cleanups, deadlock fix Kent Overstreet
2012-08-28 17:37 ` [PATCH v7 1/9] block: Generalized bio pool freeing Kent Overstreet
2012-08-28 17:37   ` Kent Overstreet
2012-08-28 17:37 ` [PATCH v7 2/9] dm: Use bioset's front_pad for dm_rq_clone_bio_info Kent Overstreet
2012-08-28 17:37 ` [PATCH v7 3/9] block: Add bio_reset() Kent Overstreet
2012-08-28 17:37   ` Kent Overstreet
2012-08-28 20:31   ` Tejun Heo
2012-08-28 20:31     ` Tejun Heo
2012-08-28 22:17     ` Kent Overstreet
2012-08-28 22:53       ` Kent Overstreet
2012-08-28 22:53         ` Kent Overstreet
2012-09-01  2:23       ` Tejun Heo
2012-09-01  2:23         ` Tejun Heo
2012-09-05 20:13         ` Kent Overstreet
2012-08-28 17:37 ` [PATCH v7 4/9] pktcdvd: Switch to bio_kmalloc() Kent Overstreet
2012-08-28 20:32   ` Tejun Heo
2012-08-28 20:32     ` Tejun Heo
2012-08-28 22:24     ` Kent Overstreet
2012-09-04  9:05     ` Jiri Kosina
2012-09-04  9:05       ` Jiri Kosina
2012-09-05 19:44       ` Kent Overstreet
2012-09-05 19:44         ` Kent Overstreet
2012-08-28 17:37 ` [PATCH v7 5/9] block: Kill bi_destructor Kent Overstreet
2012-08-28 20:36   ` Tejun Heo
2012-08-28 20:36     ` Tejun Heo
2012-08-28 22:07     ` Kent Overstreet
2012-08-28 17:37 ` [PATCH v7 6/9] block: Consolidate bio_alloc_bioset(), bio_kmalloc() Kent Overstreet
2012-08-28 17:37   ` Kent Overstreet
2012-08-28 20:41   ` Tejun Heo
2012-08-28 20:41     ` Tejun Heo
2012-08-28 22:03     ` Kent Overstreet
2012-08-28 22:03       ` Kent Overstreet
2012-09-01  2:17       ` Tejun Heo
2012-08-28 17:37 ` [PATCH v7 7/9] block: Add bio_clone_bioset(), bio_clone_kmalloc() Kent Overstreet
2012-08-28 20:44   ` Tejun Heo
2012-08-28 20:44     ` Tejun Heo
2012-08-28 22:05     ` Kent Overstreet
2012-09-01  2:19       ` Tejun Heo [this message]
2012-09-01  2:19         ` Tejun Heo
2012-08-28 17:37 ` [PATCH v7 8/9] block: Reorder struct bio_set Kent Overstreet
2012-08-28 17:37 ` [PATCH v7 9/9] block: Avoid deadlocks with bio allocation by stacking drivers Kent Overstreet
2012-08-28 20:49   ` Tejun Heo
2012-08-28 20:49     ` Tejun Heo
2012-08-28 22:28     ` Kent Overstreet
2012-08-28 23:01       ` Kent Overstreet
2012-08-28 23:01         ` Kent Overstreet
2012-08-29  1:31         ` Vivek Goyal
2012-08-29  1:31           ` Vivek Goyal
2012-08-29  3:25           ` Kent Overstreet
2012-08-29 12:57             ` Vivek Goyal
2012-08-29 12:57               ` Vivek Goyal
2012-08-29 14:39               ` [dm-devel] " Alasdair G Kergon
2012-08-29 14:39                 ` Alasdair G Kergon
2012-08-29 16:26                 ` Kent Overstreet
2012-08-29 16:26                   ` Kent Overstreet
2012-08-29 21:01                   ` John Stoffel
2012-08-29 21:08                     ` Kent Overstreet
2012-08-29 21:08                       ` Kent Overstreet
2012-08-28 22:06   ` Vivek Goyal
2012-08-28 22:06     ` Vivek Goyal
2012-08-28 22:23     ` Kent Overstreet
2012-08-28 22:23       ` Kent Overstreet
2012-08-29 16:24   ` Mikulas Patocka
2012-08-29 16:50     ` Kent Overstreet
2012-08-29 16:57       ` [dm-devel] " Alasdair G Kergon
2012-08-29 16:57         ` Alasdair G Kergon
2012-08-29 17:07       ` Vivek Goyal
2012-08-29 17:07         ` Vivek Goyal
2012-08-29 17:13         ` Kent Overstreet
2012-08-29 17:13           ` Kent Overstreet
2012-08-29 17:23           ` [dm-devel] " Alasdair G Kergon
2012-08-29 17:23             ` Alasdair G Kergon
2012-08-29 17:32             ` Kent Overstreet
2012-08-30 22:07           ` Vivek Goyal
2012-08-30 22:07             ` Vivek Goyal
2012-08-31  1:43             ` Kent Overstreet
2012-08-31  1:43               ` Kent Overstreet
2012-08-31  1:55               ` Kent Overstreet
2012-08-31  1:55                 ` Kent Overstreet
2012-08-31 15:01               ` Vivek Goyal
2012-09-03  1:26                 ` Kent Overstreet
2012-09-03  1:26                   ` Kent Overstreet
2012-09-03 20:41               ` Mikulas Patocka
2012-09-03 20:41                 ` Mikulas Patocka
2012-09-04  3:41                 ` Kent Overstreet
2012-09-04  3:41                   ` Kent Overstreet
2012-09-04 18:55                   ` Tejun Heo
2012-09-04 18:55                     ` Tejun Heo
2012-09-04 19:01                     ` Tejun Heo
2012-09-04 19:43                       ` Kent Overstreet
2012-09-04 19:43                         ` Kent Overstreet
2012-09-04 19:42                     ` Kent Overstreet
2012-09-04 21:03                       ` Tejun Heo
2012-09-04 21:03                         ` Tejun Heo
2012-09-04 19:26                   ` Mikulas Patocka
2012-09-04 19:26                     ` Mikulas Patocka
2012-09-04 19:39                     ` Vivek Goyal
2012-09-04 19:39                       ` Vivek Goyal
2012-09-04 19:51                     ` [PATCH] dm: Use bioset's front_pad for dm_target_io Kent Overstreet
2012-09-04 19:51                       ` Kent Overstreet
2012-09-04 21:20                       ` Tejun Heo
2012-09-04 21:20                         ` Tejun Heo
2012-09-11 19:28                       ` [PATCH 2] " Mikulas Patocka
2012-09-11 19:28                         ` Mikulas Patocka
2012-09-11 19:50                         ` Kent Overstreet
2012-09-11 19:50                           ` Kent Overstreet
2012-09-12 22:31                           ` Mikulas Patocka
2012-09-12 22:31                             ` Mikulas Patocka
2012-09-14 23:09                             ` [dm-devel] " Alasdair G Kergon
2012-09-14 23:09                               ` Alasdair G Kergon
2012-09-01  2:13             ` [PATCH v7 9/9] block: Avoid deadlocks with bio allocation by stacking drivers Tejun Heo
2012-09-01  2:13               ` Tejun Heo
2012-09-03  1:34               ` [PATCH v2] " Kent Overstreet
2012-09-03  1:34                 ` Kent Overstreet
2012-09-04 15:00               ` [PATCH v7 9/9] " Vivek Goyal
2012-09-04 15:00                 ` Vivek Goyal
2012-09-03  0:49             ` Dave Chinner
2012-09-03  0:49               ` Dave Chinner
2012-09-03  1:17               ` Kent Overstreet
2012-09-03  1:17                 ` Kent Overstreet
2012-09-04 13:54               ` Vivek Goyal
2012-09-04 13:54                 ` Vivek Goyal
2012-09-04 18:26                 ` Tejun Heo
2012-09-04 18:26                   ` Tejun Heo
2012-09-05  3:57                   ` Dave Chinner
2012-09-05  3:57                     ` Dave Chinner
2012-09-05  4:37                     ` Tejun Heo
2012-09-05  4:37                       ` Tejun Heo

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