Re: 2.6.9-mm1: LVM stopped working (dio-handle-eof.patch)

[Alasdair G Kergon]

On Wed, Oct 27, 2004 at 11:03:35AM -0400, Joseph Fannin wrote:
>     I made this change to 2.6.9-mm1 and it didn't.  vgchange still
> seems to be trying to read 2048 bytes, rather than 4096 (I may not
> know what I'm talking about, or even what I'm looking at, though).

LVM2 uses the (soft) device block size for both alignment and size.
If no blocksize is defined, it uses pagesize.

Even when it only needs to change a few consecutive bytes, it still 
has to read a complete aligned block, make the change, then write it 
back.

Alasdair
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