linux-kernel - [PATCH -next 0/5] ipc/sem: semop(2) improvements

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Date:   Mon, 12 Sep 2016 04:53:31 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     akpm@...ux-foundation.org
Cc:     manfred@...orfullife.com, dave@...olabs.net,
        linux-kernel@...r.kernel.org
Subject: [PATCH -next 0/5] ipc/sem: semop(2) improvements

Hi,

Here are a few updates around the semop syscall handling that I noticed while
reviewing Manfred's simple vs complex ops fixes. Changes are on top of -next,
which means that Manfred's pending patches to ipc/sem.c that remove the redundant
barrier(s) would probably have to be rebased.

The patchset has survived the following testscases:
- ltp
- ipcsemtest (https://github.com/manfred-colorfu/ipcsemtest)
- ipcscale (https://github.com/manfred-colorfu/ipcscale)

Details are in each individual patch. Please consider for v4.9.

Thanks!

Davidlohr Bueso (5):
  ipc/sem: do not call wake_sem_queue_do() prematurely
  ipc/sem: rework task wakeups
  ipc/sem: optimize perform_atomic_semop()
  ipc/sem: explicitly inline check_restart
  ipc/sem: use proper list api for pending_list wakeups

 ipc/sem.c | 404 ++++++++++++++++++++++++++++----------------------------------
 1 file changed, 185 insertions(+), 219 deletions(-)

-- 
2.6.6