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SubjectRe: [Evms-devel] Re: Re: Hardsector size support in 2.4 and 2.5
On Mon, Nov 12 2001, Christoph Hellwig wrote:
> On Mon, Nov 12, 2001 at 02:05:19PM -0600, Mark Peloquin wrote:
> > So any block device, can always expect to receive buffer heads
> > whose b_rsector value represents the offset from the beginning
> > of that device in 512 byte multiples? And this will continue
> > to hold true in 2.5 as well?
>
> There is a good chance that no 2.5 block driver will ever see a buffer_head,
> take a look at http://www.kernel.org/pub/linux/kernel/people/axboe/v2.5/ for
> details.

To expand on the specific point -- in 2.5, what will change is that
b_rsector (or equiv field, bi_sector in bio) will be offset from the
beginning of the disk, not the beginning of the partition. This moves
toe partion remaps out of the driver itself.

--
Jens Axboe

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