On Wed, 19 Nov 2003, Jens Axboe wrote: > On Wed, Nov 19 2003, James Bottomley wrote: > > > > Alternatively, we could add this as yet another parameter to the host > > > > and template structures. Any preferences? > > > > > > I suppose you have to, if you want LLD to be able to pass it down. > > > > Well, what I was fishing for: Is this property useful enough to want > > every device driver writer to think about it (i.e. document and place in > > the template), or is it rare enough that it should only be accessible > > to those who know what they're doing (via the direct block queue > > interfaces in slave_alloc/configure)? > > As far as I'm concerned, requiring 512-byte alignment is 'just > easier'... Only a select few host adapters will set it differently > anyways, so you gain basically nothing. > As usual, I am against this 512-byte alignment (thinking as st maintainer). Don't default to more strict aligment requirements than is necessary. It creates hidden performance problems for character device drivers.
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