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At 04:18 PM 11/05/2002 +0200, Roy Sigurd Karlsbakk wrote: >Will the use of O_DIRECT affect disk elevatoring? i believe the elevator is based on the 'block' layer and anything that goes thru it. so the answer is that the requests would use the elevator. for the test in question, i was doing sequential reads from the first block of each disk until some block later on in the disk. (ie. a 2gbyte read or 18gbyte read). given that was the case and the only i/o ops were 'read' operations, elevator would make no difference here. cheers, lincoln. - 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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