Messages in this thread | | | Date | Sun, 23 Dec 2007 12:26:21 +0000 | From | Christoph Hellwig <> | Subject | Re: [PATCH 0/4] add task handling notifier |
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On Thu, Dec 20, 2007 at 01:11:24PM +0000, Jan Beulich wrote: > With more and more sub-systems/sub-components leaving their footprint > in task handling functions, it seems reasonable to add notifiers that > these components can use instead of having them all patch themselves > directly into core files.
I agree that we probably want something like this. As do some others, so we already had a few a few attempts at similar things. The first one is from SGI and called PAGG (http://oss.sgi.com/projects/pagg/) and also includes allocating per-task data for it's users. Then also from SGI there has been a simplified version called pnotify that's also available from the website above.
Later Matt Helsley had something called "Task Watchers" which lwn has an article on: http://lwn.net/Articles/208117/.
For some reason neither ever made a lot of progess (performance problems?).
As said by other we really should have a register/unregister API instead of exposing the implementation. Also please don't export anything until we actuall grow modular users in the tree.
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