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[PATCH -tip 0/3] locking/percpu-rwsem: writer-side optimizations

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Hi,

Here are two updates intended for those rare updater cases.

wrt numbers, I'm still trying to figure out this android boot environment
(that calls cgroup_proc_write ipc paths) which might care about these
changes. In the mean time, I'd like to know if anyone has any objections
to these optimizations.

Passed kernel builds with lockdep, as well as an overnight run doing
locktoture.

Thanks.

Davidlohr Bueso (3):
  locking/percpu-rwsem: Move text file into Documentation/locking/
  locking/percpu-rwsem: Replace bulky wait-queues with swait
  locking/percpu-rwsem: Avoid unnecessary writer wakeups

 Documentation/locking/percpu-rw-semaphore.txt | 27 ++++++++++
 Documentation/percpu-rw-semaphore.txt         | 27 ----------
 include/linux/percpu-rwsem.h                  |  6 +--
 kernel/locking/percpu-rwsem.c                 | 78 +++++++++++++++------------
 4 files changed, 73 insertions(+), 65 deletions(-)
 create mode 100644 Documentation/locking/percpu-rw-semaphore.txt
 delete mode 100644 Documentation/percpu-rw-semaphore.txt

-- 
2.6.6

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[PATCH -tip 0/3] locking/percpu-rwsem: writer-side optimizations Davidlohr Bueso <dave@stgolabs.net> - 2016-11-18 20:00 +0100
  [PATCH 1/3] locking/percpu-rwsem: Move text file into Documentation/locking/ Davidlohr Bueso <dave@stgolabs.net> - 2016-11-18 20:00 +0100
  [PATCH 2/3] locking/percpu-rwsem: Replace bulky wait-queues with swait Davidlohr Bueso <dave@stgolabs.net> - 2016-11-18 20:00 +0100
    Re: [PATCH 2/3] locking/percpu-rwsem: Replace bulky wait-queues         with swait Oleg Nesterov <oleg@redhat.com> - 2016-11-21 14:00 +0100
      Re: [PATCH 2/3] locking/percpu-rwsem: Replace bulky wait-queues with  swait Davidlohr Bueso <dave@stgolabs.net> - 2016-11-21 18:30 +0100
  [PATCH 3/3] locking/percpu-rwsem: Avoid unnecessary writer wakeups Davidlohr Bueso <dave@stgolabs.net> - 2016-11-18 20:00 +0100
    Re: [PATCH 3/3] locking/percpu-rwsem: Avoid unnecessary writer  wakeups Peter Zijlstra <peterz@infradead.org> - 2016-11-21 13:30 +0100
      Re: [PATCH 3/3] locking/percpu-rwsem: Avoid unnecessary writer         wakeups Oleg Nesterov <oleg@redhat.com> - 2016-11-21 13:50 +0100
        Re: [PATCH 3/3] locking/percpu-rwsem: Avoid unnecessary writer         wakeups Oleg Nesterov <oleg@redhat.com> - 2016-11-21 16:10 +0100
          Re: [PATCH 3/3] locking/percpu-rwsem: Avoid unnecessary writer  wakeups Davidlohr Bueso <dave@stgolabs.net> - 2016-11-22 05:00 +0100
            Re: [PATCH 3/3] locking/percpu-rwsem: Avoid unnecessary writer         wakeups Oleg Nesterov <oleg@redhat.com> - 2016-11-23 15:50 +0100
    Re: [PATCH 3/3] locking/percpu-rwsem: Avoid unnecessary writer         wakeups Oleg Nesterov <oleg@redhat.com> - 2016-11-21 13:30 +0100

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