[git pull] device-mapper changes for 3.11

[git pull] device-mapper changes for 3.11

[Alasdair G Kergon]

Please pull from:
 
  git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm tags/dm-3.11-changes

to get the following device-mapper changes for 3.11.

Thanks,
Alasdair


----------------------------------------------------------------
Add a device-mapper target called dm-switch to provide a multipath
framework for storage arrays that dynamically reconfigure their
preferred paths for different device regions.

Fix a bug in the verity target that prevented its use with some
specific sizes of devices.

Improve some locking mechanisms in the device-mapper core and bufio.

Add Mike Snitzer as a device-mapper maintainer.

A few more clean-ups and fixes.

----------------------------------------------------------------
Alasdair G Kergon (2):
      dm flakey: correct ctr alloc failure mesg
      dm: update maintainers

Hannes Reinecke (1):
      dm mpath: fix ioctl deadlock when no paths

Jim Ramsay (1):
      dm: add switch target

Mikulas Patocka (9):
      dm ioctl: set noio flag to avoid __vmalloc deadlock
      dm verity: fix inability to use a few specific devices sizes
      dm: use __GFP_HIGHMEM in __vmalloc
      dm verity: remove pointless comparison
      dm verity: use __ffs and __fls
      dm cache: fix arm link errors with inline
      dm bufio: submit writes outside lock
      dm: optimize use SRCU and RCU
      dm: optimize reorder structure

 Documentation/device-mapper/switch.txt |  126 ++++++++
 MAINTAINERS                            |    2 +
 drivers/md/Kconfig                     |   14 +
 drivers/md/Makefile                    |    1 +
 drivers/md/dm-bufio.c                  |   75 ++++-
 drivers/md/dm-cache-target.c           |    4 +
 drivers/md/dm-flakey.c                 |    2 +-
 drivers/md/dm-ioctl.c                  |  127 +++++---
 drivers/md/dm-mpath.c                  |    8 +-
 drivers/md/dm-switch.c                 |  538 ++++++++++++++++++++++++++++++++
 drivers/md/dm-table.c                  |   35 ---
 drivers/md/dm-verity.c                 |   17 +-
 drivers/md/dm.c                        |  177 ++++++-----
 include/linux/device-mapper.h          |    6 +-
 include/uapi/linux/dm-ioctl.h          |    4 +-
 15 files changed, 951 insertions(+), 185 deletions(-)
 create mode 100644 Documentation/device-mapper/switch.txt
 create mode 100644 drivers/md/dm-switch.c

Re: [git pull] device-mapper changes for 3.11

[Stephen Rothwell]

[-- Attachment #1: Type: text/plain, Size: 1167 bytes --]

On Thu, 11 Jul 2013 02:34:48 +0100 Alasdair G Kergon <agk@redhat.com> wrote:
>
> Please pull from:
>  
>   git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm tags/dm-3.11-changes
> 
> to get the following device-mapper changes for 3.11.

The device-mapper tree exists as a quilt series in linux-next.  The
patches in the above git tree are the same as the ones in linux-next, but
have a different base (and the ones in linux-next were on a different
base from yesterday as well). :-(

Alistair, is there some reason that you cannot maintain some relatively
stable git tree for me to fetch (instead of the quilt series).  Also,
there is not real reason to keep rebasing this stuff (especially just
before sending it to Linus).

If you want to test for conflicts before submission, then, fine, do that
in a test branch by *merging* Linus' tree (git is good for that), but send
Linus your pre merged branch and if there is some complex conflict, then
explain it to him (and me if necessary) or publish your test branch
separately to show your suggested resolution.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

[-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --]

Re: [git pull] device-mapper changes for 3.11

[Mike Snitzer]

On Thu, Jul 11 2013 at  2:20am -0400,
Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> On Thu, 11 Jul 2013 02:34:48 +0100 Alasdair G Kergon <agk@redhat.com> wrote:
> >
> > Please pull from:
> >  
> >   git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm tags/dm-3.11-changes
> > 
> > to get the following device-mapper changes for 3.11.
> 
> The device-mapper tree exists as a quilt series in linux-next.  The
> patches in the above git tree are the same as the ones in linux-next, but
> have a different base (and the ones in linux-next were on a different
> base from yesterday as well). :-(
> 
> Alistair, is there some reason that you cannot maintain some relatively
> stable git tree for me to fetch (instead of the quilt series).  Also,
> there is not real reason to keep rebasing this stuff (especially just
> before sending it to Linus).

Hi Stephen,

I'll be transitioning in to maintain device mapper (for 3.12).  Alasdair
will be helping me as needed but ultimately the plan is for me to be the
one sending DM changes upstream in the future.  I will maintain a
kernel.org git tree with a 'for-next' branch for you to pull.  I'll
likely base my for-next on Jens' for-next as a rule (unless that isn't
ideal on a linux-next process level).

There will be a learning curve for me initially on how to interface with
linux-next, proper git rebase protocol relative to Linus' ideals, etc
but I hope to cut through that quickly.

Regards,
Mike

Re: [git pull] device-mapper changes for 3.11

[Stephen Rothwell]

[-- Attachment #1: Type: text/plain, Size: 938 bytes --]

Hi Mike,

On Thu, 11 Jul 2013 09:35:11 -0400 Mike Snitzer <snitzer@redhat.com> wrote:
>
> I'll be transitioning in to maintain device mapper (for 3.12).  Alasdair
> will be helping me as needed but ultimately the plan is for me to be the
> one sending DM changes upstream in the future.  I will maintain a
> kernel.org git tree with a 'for-next' branch for you to pull.  I'll
> likely base my for-next on Jens' for-next as a rule (unless that isn't
> ideal on a linux-next process level).

OK, that sounds fine as long as Jen's never rebases his branch (I think
he is pretty good about that).

> There will be a learning curve for me initially on how to interface with
> linux-next, proper git rebase protocol relative to Linus' ideals, etc
> but I hope to cut through that quickly.

Excellent.  Please feel free to ask if you have any questions.
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

[-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --]

Re: [dm-devel] [git pull] device-mapper changes for 3.11

[Alasdair G Kergon]

On Thu, Jul 11, 2013 at 04:20:40PM +1000, Stephen Rothwell wrote:
> Alistair, is there some reason that you cannot maintain some relatively
> stable git tree for me to fetch (instead of the quilt series).  

Well Mike Snitzer is becoming a joint maintainer and this also requires
changes to the workflow so watch this space.

> Also,
> there is not real reason to keep rebasing this stuff (especially just
> before sending it to Linus).
 
Most of the time the patches are decoupled from the rest of the tree
and the final linux-next kernel is the same regardless of where the
quilt tree is attached.  I maintain a single sequence of patches 
where the ones ready for upstream float up to the top and the
linux-next export is a by-product and not the primary output.

Anyway, like I say, we'll be changing things during the next couple of
cycles and we'll bear your suggestions in mind.

Alasdair

Re: [dm-devel] [git pull] device-mapper changes for 3.11

[Stephen Rothwell]

[-- Attachment #1: Type: text/plain, Size: 1168 bytes --]

Hi Alasdair,

On Thu, 11 Jul 2013 14:55:22 +0100 Alasdair G Kergon <agk@redhat.com> wrote:
>
> On Thu, Jul 11, 2013 at 04:20:40PM +1000, Stephen Rothwell wrote:
> > Alistair, is there some reason that you cannot maintain some relatively
> > stable git tree for me to fetch (instead of the quilt series).  
> 
> Well Mike Snitzer is becoming a joint maintainer and this also requires
> changes to the workflow so watch this space.

OK, noted.

> > Also,
> > there is not real reason to keep rebasing this stuff (especially just
> > before sending it to Linus).
>  
> Most of the time the patches are decoupled from the rest of the tree
> and the final linux-next kernel is the same regardless of where the
> quilt tree is attached.  I maintain a single sequence of patches 
> where the ones ready for upstream float up to the top and the
> linux-next export is a by-product and not the primary output.
> 
> Anyway, like I say, we'll be changing things during the next couple of
> cycles and we'll bear your suggestions in mind.

Thanks, I will watch for developments.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

[-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --]

please fetch new git-based DM 'for-next' branch [was: Re: [git pull] device-mapper changes for 3.11]

[Mike Snitzer]

On Thu, Jul 11 2013 at  9:03pm -0400,
Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi Alasdair,
> 
> On Thu, 11 Jul 2013 14:55:22 +0100 Alasdair G Kergon <agk@redhat.com> wrote:
> >
> > On Thu, Jul 11, 2013 at 04:20:40PM +1000, Stephen Rothwell wrote:
> > > Alistair, is there some reason that you cannot maintain some relatively
> > > stable git tree for me to fetch (instead of the quilt series).  
> > 
> > Well Mike Snitzer is becoming a joint maintainer and this also requires
> > changes to the workflow so watch this space.
> 
> OK, noted.

Hi Stephen,

To access all future DM changes for linux-next, please switch from
Alasdair's quilt tree to using the 'for-next' branch of the DM git repo:

git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git

Thanks,
Mike

Re: please fetch new git-based DM 'for-next' branch [was: Re: [git pull] device-mapper changes for 3.11]

[Stephen Rothwell]

[-- Attachment #1: Type: text/plain, Size: 484 bytes --]

Hi Mike, Alasdair,

On Fri, 16 Aug 2013 17:18:10 -0400 Mike Snitzer <snitzer@redhat.com> wrote:
>
> To access all future DM changes for linux-next, please switch from
> Alasdair's quilt tree to using the 'for-next' branch of the DM git repo:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git

Done.  You are both listed as contacts for problems with that tree.

Thanks.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

[-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --]