Messages in this thread | | | From | Roy Sigurd Karlsbakk <> | Subject | Re: O_DIRECT performance impact on 2.4.18 (was: Re: [PATCH] 2.5.14 IDE 56) | Date | Sat, 11 May 2002 16:18:35 +0200 |
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On Friday 10 May 2002 17:55, Linus Torvalds wrote: > On Fri, 10 May 2002, Lincoln Dale wrote: > > so O_DIRECT in 2.4.18 still shows up as a 55% performance hit versus no > > O_DIRECT. anyone have any clues? > > Yes. > > O_DIRECT isn't doing any read-ahead. > > For O_DIRECT to be a win, you need to make it asynchronous.
Will the use of O_DIRECT affect disk elevatoring?
Sorry if this is OT - I just need to know
Please cc: to me as I'm not on the list
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