Messages in this thread | | | Date | Fri, 30 Jul 1999 01:39:11 +0200 | From | Matthew Wilcox <> | Subject | Re: priority inversion |
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On Thu, Jul 29, 1999 at 11:50:55AM -0600, Jeff Merkey wrote: > > Priority Inversion is **BAD BUSINESS**. Someone whould fix whatever this > person is complaining about. I agree that priority inheritance is slow and > makes for **FAT** sync object code, but it's either this or throw priorities > out of the window in the kernel proper since we will see **LOTS** of > deadlocks and busted applications if an inversion model is what we end up > with.
Linux has never had a mechanism to deal with priority inversion since it was first introduced (in 2.0, I believe?). Victor Yodaiken gave an excellent presentation at Linux Expo about why priority inheritance is a stupid idea, but that particular section isn't in the Proceedings. I also can't find it on the rtlinux website. Victor, would you be so kind as to post a link to it if it exists?
-- Matthew Wilcox <willy@bofh.ai> "Windows and MacOS are products, contrived by engineers in the service of specific companies. Unix, by contrast, is not so much a product as it is a painstakingly compiled oral history of the hacker subculture." - N Stephenson
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