Messages in this thread |  | | Date | Tue, 6 Feb 2001 20:35:25 +0100 | From | Jens Axboe <> | Subject | Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait |
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On Tue, Feb 06 2001, Ben LaHaise wrote: > > > As for io completion, can't we just issue seperate requests for the > > > critical data and the readahead? That way for SCSI disks, the important > > > io should be finished while the readahead can continue. Thoughts? > > > > Priorities? > > Definately. I'd like to be able to issue readaheads with a "don't bother > executing if this request unless the cost is low" bit set. It might also > be helpful for heavy multiuser loads (or even a single user with multiple > processes) to ensure progress is made for others.
And in other contexts too it might be handy to assign priorities to requests as well. I don't know how sgi plan on handling grio (or already handle it in irix), maybe Steve can fill us in on that :)
-- Jens Axboe
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