Messages in this thread | | | Date | Tue, 18 Jul 2000 01:50:22 +0200 | From | Jens Axboe <> | Subject | Re: elevator algorithm questions |
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On Mon, Jul 17 2000, Vitez Gabor wrote: > Hi, > I've got a few questions about the elevator algorithm. > After looking at ll_rw_blk.c and reading the linux-kernel mail archives > it seems to me that the elevator algorithm is used for all kind of block > devices, including hardware-raid controllers (like IBM ServerRaid and > Compaq SMART2). It also seems to me that you are not using the head > position for block write sequence reordering, but the linear address of > the blocks. Are these two "assumptions" true?
Yes. But low level drivers are free to override that choice by either defining their own I/O scheduler or use the no-op scheduler provided by the kernel as well.
-- * Jens Axboe <axboe@suse.de> * SuSE Labs
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