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Date: Mon, 29 Jan 2007 10:43:22 -0500 From: Phillip Susi <psusi@....rr.com> To: Denis Vlasenko <vda.linux@...glemail.com> CC: Bill Davidsen <davidsen@....com>, Michael Tokarev <mjt@....msk.ru>, Linus Torvalds <torvalds@...l.org>, Viktor <vvp01@...ox.ru>, Aubrey <aubreylee@...il.com>, Hua Zhong <hzhong@...il.com>, Hugh Dickins <hugh@...itas.com>, linux-kernel@...r.kernel.org, hch@...radead.org Subject: Re: O_DIRECT question Denis Vlasenko wrote: > I still don't see much difference between O_SYNC and O_DIRECT write > semantic. Yes, if you change the normal io paths to properly support playing vmsplice games ( which have a number of corner cases ) to get the zero copy, and support madvise() and O_SYNC to control caching behavior, and fix all the error handling corner cases, then you may be able to do away with O_DIRECT. I believe that doing all that will be much more complex than O_DIRECT however. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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