Messages in this thread | | | Date | Tue, 22 Jan 2002 09:16:53 +0100 | From | Jens Axboe <> | Subject | Re: Linux 2.5.3-pre1-aia1 |
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On Mon, Jan 21 2002, Andre Hedrick wrote: > > On Mon, Jan 21, 2002 at 03:53:20PM -0800, Andre Hedrick wrote: > > > On Mon, 21 Jan 2002, Vojtech Pavlik wrote: > > > Okay if the execution of the command block is ATOMIC, and we want to stop > > > an ATOMIC operation to go alter buffers? > > > > YES! I think you got it! Because atomic here doesn't mean 'do it all as > > soon as possible with no delay', but 'do nothing else on the ATA bus > > inbetween'. > > In order to do this you can not issue a sector request larger than an > addressable buffer, since the request walking of the rq->buffer is not > allowed.
It's not that it's not allowed, it's that it doesn't work the way you want it. ->buffer is just the first segment, which is 8 sectors max, that much is correct. But nothing prevents your from ending the front of the request and continuing and the drive will never know. Just see task_mulin_intr.
-- Jens Axboe
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