Messages in this thread | | | Subject | Re: [Lse-tech] Re: [ckrm-tech] Re: [PATCH 00/01] Move Exit Connectors | From | Matt Helsley <> | Date | Wed, 11 Jan 2006 21:26:08 -0800 |
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On Thu, 2006-01-12 at 14:29 +1100, Keith Owens wrote: > 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 >
Interesting. Might the 'inuse' flags suffer from bouncing due to false sharing?
Cheers, -Matt Helsley
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