Messages in this thread | | | Date | Fri, 8 Aug 2003 07:42:39 +0200 | From | Jens Axboe <> | Subject | Re: [PATCH][2.6-mm] Readahead issues and AIO read speedup |
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On Thu, Aug 07 2003, Joel Becker wrote: > On Thu, Aug 07, 2003 at 09:28:00AM -0700, Andrew Morton wrote: > > If the database pagesize is 16k then the application should be submitting > > 16k reads, yes? If so then these should not be creating 4k requests at the > > device layer! So what we need to do is to ensure that at least those 16k > > Um, I thought bio enforced single CDB I/O for contiguous chunks > of disk! If it doesn't, 2.6 is just as lame as 2.4.
It does of course, that was one of the main points of the bio structure. ->readpages() can submit those 16k minimum chunks in one bio.
-- Jens Axboe
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