linux-kernel - Re: [GIT PULL] percpu changes for v3.17-rc1

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Date:	Tue, 5 Aug 2014 09:07:37 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] percpu changes for v3.17-rc1

On 08/04/2014 10:04 PM, Tejun Heo wrote:
> Hello, Linus.
> 
> * Major reorganization of percpu header files which I think makes
>   things a lot more readable and logical than before.
> 
> * percpu-refcount is updated so that it requires explicit destruction
>   and can be reinitialized if necessary.  This was pulled into the
>   block tree to replace the custom percpu refcnting implemented in
>   blk-mq.
> 
> * In the process, percpu and percpu-refcount got cleaned up a bit.
> 
> This pull request contains two stray workqueue commits from Lai.
> These are my mistakes.  I mistakenly applied the two to this tree and
> then cherry picked them to the workqueue tree but forgot to roll them
> back from this one.  I realized this only after percpu-refcount
> changes were pulled into the block tree so couldn't fix it up
> afterwards.  Sorry.  They shouldn't cause any problem during merge.
> 
> Thanks.
> 
> The following changes since commit ebe06187bf2aec10d537ce4595e416035367d703:
> 
>   epoll: fix use-after-free in eventpoll_release_file (2014-06-16 17:21:59 -1000)
> 
> are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git for-3.17
> 
> for you to fetch changes up to 2d7227828e1475c7b272e55bd70c4cec8eea219a:
> 
>   percpu-refcount: implement percpu_ref_reinit() and percpu_ref_is_zero() (2014-06-28 08:10:14 -0400)
> 
> ----------------------------------------------------------------
> Christoph Lameter (1):
>       percpu: Use ALIGN macro instead of hand coding alignment calculation
> 
> Lai Jiangshan (2):
>       workqueue: clear POOL_DISASSOCIATED in rebind_workers()
>       workqueue: stronger test in process_one_work()

These two are also requested to be pulled on workqueue tree.

> 
> Tejun Heo (18):
>       percpu: disallow archs from overriding SHIFT_PERCPU_PTR()
>       percpu: introduce arch_raw_cpu_ptr()
>       percpu: include/asm-generic/percpu.h should contain only arch-overridable parts
>       percpu: move accessors from include/linux/percpu.h to percpu-defs.h
>       percpu: reorganize include/linux/percpu-defs.h
>       percpu: only allow sized arch overrides for {raw|this}_cpu_*() ops
>       percpu: move generic {raw|this}_cpu_*_N() definitions to include/asm-generic/percpu.h
>       percpu: move {raw|this}_cpu_*() definitions to include/linux/percpu-defs.h
>       percpu: reorder macros in percpu header files
>       percpu: use raw_cpu_*() to define __this_cpu_*()
>       percpu: preffity percpu header files
>       percpu: invoke __verify_pcpu_ptr() from the generic part of accessors and operations
>       percpu-refcount, aio: use percpu_ref_cancel_init() in ioctx_alloc()
>       percpu-refcount: one bit is enough for REF_STATUS
>       percpu-refcount: add helpers for ->percpu_count accesses
>       percpu-refcount: use unsigned long for pcpu_count pointer
>       percpu-refcount: require percpu_ref to be exited explicitly
>       percpu-refcount: implement percpu_ref_reinit() and percpu_ref_is_zero()
> 
>  arch/x86/include/asm/percpu.h    |   3 +-
>  drivers/target/target_core_tpg.c |   4 +-
>  fs/aio.c                         |   6 +-
>  include/asm-generic/percpu.h     | 410 ++++++++++++++++++++----
>  include/linux/percpu-defs.h      | 380 +++++++++++++++++++++-
>  include/linux/percpu-refcount.h  |  64 ++--
>  include/linux/percpu.h           | 673 ---------------------------------------
>  kernel/cgroup.c                  |   8 +-
>  kernel/workqueue.c               |  19 +-
>  lib/percpu-refcount.c            |  86 +++--
>  mm/percpu.c                      |   3 +-
>  11 files changed, 834 insertions(+), 822 deletions(-)
> 

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