Messages in this thread | | | Date | Fri, 3 Feb 2006 09:54:59 +0100 | From | Jens Axboe <> | Subject | Re: CD writing in future Linux (stirring up a hornets' nest) |
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On Thu, Feb 02 2006, Lee Revell wrote: > On Thu, 2006-02-02 at 16:49 -0500, Jim Crilly wrote: > > On 02/02/06 04:25:50PM -0500, Lee Revell wrote: > > > On Thu, 2006-02-02 at 16:09 -0500, Jim Crilly wrote: > > > > Apparently O_EXCL was added by Ubuntu and Debian to stop > > > > burns being corrupted by hald polling the device while a disc is > > > > being burned. > > > > > > IO priorities are the correct solution... > > > > > > Lee > > > > Is this something that's available now? > > > > Hmm, actually I'm not sure it would make a difference, as I don't think > CD writing goes through the regular IO scheduler.
Right, you can only prioritize "regular" io, not stuff sent with SG_IO. So it'll help burning only for the case of getting the data required to the buffer, not in getting that data out to the burner. The latter is usually not a problem though, as these requests take a 'short cut' directly to the dispatch queue.
-- Jens Axboe
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