John Hesterberg (on Wed, 11 Jan 2006 15:39:10 -0600) wrote: >On Wed, Jan 11, 2006 at 01:02:10PM -0800, Matt Helsley wrote: >> Have you looked at Alan Stern's notifier chain fix patch? Could that be >> used in task_notify? > >I have two concerns about an all-tasks notification interface. >First, we want this to scale, so don't want more global locks. >One unique part of the task notify is that it doesn't use locks.
Neither does Alan Stern's atomic notifier chain. Indeed it cannot use locks, because the atomic notifier chains can be called from anywhere, including non maskable interrupts. The downside is that Alan's atomic notifier chains require RCU. An alternative patch that requires no locks and does not even require RCU is in http://marc.theaimsgroup.com/?l=linux-kernel&m=113392370322545&w=2 ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
