Re: 64-bit block sizes on 32-bit systems

[Manfred Spraul]

>> I vaguely remember a discussion about this a few months back.
>> If I remember, the reasoning was it would unnecessarily slow
>> down smaller systems that would never have block devices in
>> the 4-28T range attached.
>
>4k page size * 2GB = 8TB.

Try it.
If your drive (array) is larger than 512byte*4G (4TB) linux will eat
your data.

drivers/block/ll_rw_blk.c, in submit_bh()
>    bh->b_rsector = bh->b_blocknr * (bh->b_size >> 9);

But it shouldn't cause data corruptions:
It was discussed a few months ago, and iirc LVM refuses to create too
large volumes.

--
    Manfred


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