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On Thu, 11 Jan 2007, Aubrey wrote: > > Now, my question is, is there a existing way to mount a filesystem > with O_DIRECT flag? so that I don't need to change anything in my > system. If there is no option so far, What is the right way to achieve > my purpose? The right way to do it is to just not use O_DIRECT. The whole notion of "direct IO" is totally braindamaged. Just say no. This is your brain: O This is your brain on O_DIRECT: . Any questions? I should have fought back harder. There really is no valid reason for EVER using O_DIRECT. You need a buffer whatever IO you do, and it might as well be the page cache. There are better ways to control the page cache than play games and think that a page cache isn't necessary. So don't use O_DIRECT. Use things like madvise() and posix_fadvise() instead. Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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