From: Adrian Bunk <bunk@kernel.org>
To: Kent Overstreet <koverstreet@google.com>
Cc: Adrian Bunk <bunk@kernel.org>,
linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org,
dm-devel@redhat.com, tj@kernel.org, vgoyal@redhat.com,
mpatocka@redhat.com, bharrosh@panasas.com,
Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH v6 08/13] block: Add an explicit bio flag for bios that own their bvec
Date: Wed, 22 Aug 2012 23:00:38 +0300 [thread overview]
Message-ID: <20120822200038.GB27453@bunk.dyndns.info> (raw)
In-Reply-To: <20120822192241.GA30084@google.com>
On Wed, Aug 22, 2012 at 12:22:41PM -0700, Kent Overstreet wrote:
> On Wed, Aug 22, 2012 at 08:43:52PM +0300, Adrian Bunk wrote:
> > On Wed, Aug 22, 2012 at 10:04:05AM -0700, Kent Overstreet wrote:
> > >...
> > > --- a/include/linux/blk_types.h
> > > +++ b/include/linux/blk_types.h
> > > @@ -117,6 +117,7 @@ struct bio {
> > > * BIO_POOL_IDX()
> > > */
> > > #define BIO_RESET_BITS 12
> > > +#define BIO_OWNS_VEC 12 /* bio_free() should free bvec */
> > >...
> >
> > This doesn't look right.
>
> Well, the first 12 bits are reset, so bit 12 will get preserved... I
> guess it's unusual to have a duplicated enum value like that but
> BIO_RESET_BITS is just a marker, not a real bit.
Wouldn't a BIO_RESET_MASK be better than BIO_RESET_BITS?
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
next prev parent reply other threads:[~2012-08-22 20:08 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-22 17:03 [PATCH v6 00/13] Block cleanups Kent Overstreet
2012-08-22 17:03 ` [PATCH v6 01/13] block: Generalized bio pool freeing Kent Overstreet
2012-08-22 21:27 ` Nicholas A. Bellinger
2012-08-22 17:03 ` [PATCH v6 02/13] dm: Use bioset's front_pad for dm_rq_clone_bio_info Kent Overstreet
2012-08-22 18:32 ` Tejun Heo
2012-08-22 21:30 ` Vivek Goyal
2012-08-24 7:14 ` Kent Overstreet
2012-08-24 18:40 ` Vivek Goyal
2012-08-22 17:04 ` [PATCH v6 03/13] block: Add bio_reset() Kent Overstreet
2012-08-22 18:34 ` Tejun Heo
2012-08-22 19:51 ` Tejun Heo
2012-08-22 17:04 ` [PATCH v6 04/13] pktcdvd: Switch to bio_kmalloc() Kent Overstreet
2012-08-22 19:55 ` Tejun Heo
2012-08-28 23:19 ` Jiri Kosina
2012-08-29 4:35 ` Peter Osterlund
2012-09-03 16:15 ` Jiri Kosina
2012-08-22 17:04 ` [PATCH v6 05/13] block: Kill bi_destructor Kent Overstreet
2012-08-22 20:00 ` Tejun Heo
2012-08-24 5:09 ` Kent Overstreet
2012-08-22 17:04 ` [PATCH v6 06/13] block: Consolidate bio_alloc_bioset(), bio_kmalloc() Kent Overstreet
2012-08-22 20:17 ` Tejun Heo
2012-08-24 5:04 ` Kent Overstreet
2012-08-24 20:08 ` Tejun Heo
2012-08-22 17:04 ` [PATCH v6 07/13] block: Avoid deadlocks with bio allocation by stacking drivers Kent Overstreet
2012-08-22 20:30 ` Tejun Heo
2012-08-24 5:55 ` Kent Overstreet
2012-08-24 20:28 ` Tejun Heo
2012-08-22 17:04 ` [PATCH v6 08/13] block: Add an explicit bio flag for bios that own their bvec Kent Overstreet
2012-08-22 17:43 ` Adrian Bunk
2012-08-22 19:22 ` Kent Overstreet
2012-08-22 20:00 ` Adrian Bunk [this message]
2012-08-28 17:23 ` Kent Overstreet
2012-08-22 17:04 ` [PATCH v6 09/13] block: Rename bio_split() -> bio_pair_split() Kent Overstreet
2012-08-22 17:04 ` [PATCH v6 10/13] block: Introduce new bio_split() Kent Overstreet
2012-08-22 20:46 ` Tejun Heo
2012-08-22 17:04 ` [PATCH v6 11/13] block: Rework bio_pair_split() Kent Overstreet
2012-08-22 21:04 ` Tejun Heo
2012-08-24 2:25 ` Martin K. Petersen
2012-08-24 10:37 ` Kent Overstreet
2012-08-24 20:58 ` Tejun Heo
2012-08-24 10:30 ` Kent Overstreet
2012-08-24 20:53 ` Tejun Heo
2012-08-22 17:04 ` [PATCH v6 12/13] block: Add bio_clone_bioset(), bio_clone_kmalloc() Kent Overstreet
2012-08-22 17:13 ` Jeff Garzik
2012-08-22 21:07 ` Tejun Heo
2012-08-24 6:24 ` Kent Overstreet
2012-08-24 20:36 ` Tejun Heo
2012-08-22 17:04 ` [PATCH v6 13/13] block: Only clone bio vecs that are in use Kent Overstreet
2012-08-22 21:10 ` Tejun Heo
2012-08-24 7:05 ` Kent Overstreet
2012-08-24 20:42 ` Tejun Heo
2012-08-23 18:00 ` [PATCH v6 00/13] Block cleanups Vivek Goyal
2012-08-24 12:46 ` Kent Overstreet
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