linux-kernel - Re: [PATCH v3 0/8] change sb_writers to use percpu_rw

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Message-ID: <20150815120326.GA23868@redhat.com>
Date:	Sat, 15 Aug 2015 14:03:26 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Dave Chinner <david@...morbit.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Jan Kara <jack@...e.cz>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/8] change sb_writers to use percpu_rw_semaphore

On 08/15, Al Viro wrote:
>
> On Fri, Aug 14, 2015 at 07:19:35PM +0200, Oleg Nesterov wrote:
> > On 08/13, Jan Kara wrote:
> > >
> > > Regarding the routing, ideally Al Viro should take these as a VFS
> > > maintainer.
> >
> > Al, could you take these patches?
>
> I can live with that.  Do you have it as a branch in a public git tree?

Just created

	git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc sb_writers_pcpu_rwsem

Based on Linus's tree.

Thanks!

Oleg.
---

The following changes since commit 45e38cff4fce8d6871b5fa5e734e4dc9814d6056:
  Linus Torvalds (1):
        Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc sb_writers_pcpu_rwsem

Oleg Nesterov (8):
      introduce __sb_writers_{acquired,release}() helpers
      fix the broken lockdep logic in __sb_start_write()
      document rwsem_release() in sb_wait_write()
      percpu-rwsem: introduce percpu_down_read_trylock()
      percpu-rwsem: introduce percpu_rwsem_release() and percpu_rwsem_acquire()
      percpu-rwsem: kill CONFIG_PERCPU_RWSEM
      shift percpu_counter_destroy() into destroy_super_work()
      change sb_writers to use percpu_rw_semaphore

 arch/Kconfig                  |    1 -
 fs/btrfs/transaction.c        |    8 +--
 fs/super.c                    |  171 ++++++++++++++++++-----------------------
 fs/xfs/xfs_aops.c             |    6 +-
 include/linux/fs.h            |   23 +++---
 include/linux/percpu-rwsem.h  |   20 +++++
 init/Kconfig                  |    1 -
 kernel/locking/Makefile       |    3 +-
 kernel/locking/percpu-rwsem.c |   13 +++
 lib/Kconfig                   |    3 -
 10 files changed, 123 insertions(+), 126 deletions(-)

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