Messages in this thread | ![/](/images/icornerl.gif) | | From | Badari Pulavarty <> | Subject | Re: [PATCH][2.6-mm] Readahead issues and AIO read speedup | Date | Thu, 7 Aug 2003 13:41:50 -0700 |
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On Thursday 07 August 2003 10:39 am, Andrew Morton wrote: > Badari Pulavarty <pbadari@us.ibm.com> wrote: > > We should do readahead of actual pages required by the current > > read would be correct solution. (like Suparna suggested). > > I repeat: what will be the effect of this if all those pages are already in > pagecache?
Hmm !! Do you think just peeking at pagecache and bailing out if nothing needed to be done, is too expensive ? Anyway, slow read code has to do this later. Doing it in readahead one more time causes significant perf. hit ? And also, do you think this is the most common case ?
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