1. 03 Feb, 2009 1 commit
    • Frederic Weisbecker's avatar
      connector: create connector workqueue only while needed once · 1a5645bc
      Frederic Weisbecker authored
      The netlink connector uses its own workqueue to relay the datas sent
      from userspace to the appropriate callback.  If you launch the test
      from Documentation/connector and change it a bit to send a high flow
      of data, you will see thousands of events coming to the "cqueue"
      workqueue by looking at the workqueue tracer.
      
      This flow of events can be sent very quickly. So, to not encumber the
      kevent workqueue and delay other jobs, the "cqueue" workqueue should
      remain.
      
      But this workqueue is pointless most of the time, it will always be
      created (assuming you have built it of course) although only
      developpers with specific needs will use it.
      
      So avoid this "most of the time useless task", this patch proposes to
      create this workqueue only when needed once.  The first jobs to be
      sent to connector callbacks will be sent to kevent while the "cqueue"
      thread creation will be scheduled to kevent too.
      
      The following jobs will continue to be scheduled to keventd until the
      cqueue workqueue is created, and then the rest of the jobs will
      continue to perform as usual, through this dedicated workqueue.
      
      Each time I tested this patch, only the first event was sent to
      keventd, the rest has been sent to cqueue which have been created
      quickly.
      
      Also, this patch fixes some trailing whitespaces on the connector files.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Acked-by: default avatarEvgeniy Polyakov <zbr@ioremap.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1a5645bc
  2. 02 Feb, 2009 1 commit
  3. 01 Feb, 2009 29 commits
  4. 30 Jan, 2009 9 commits