Il 14/11/2012 01:54, Jason J. Herne ha scritto:
> blk_queue_physical_block_size(sdp->request_queue,
> sdkp->physical_block_size);
> sdkp->device->sector_size = sector_size;
> +
> + /* Use read/write(16) for > 2TB disks */
> + sdp->use_16_for_rw = (sdkp->capacity > 0xffffffff);
> }
This needs to be done before this bit:
/* Rescale capacity to 512-byte units */
if (sector_size == 4096)
sdkp->capacity <<= 3;
else if (sector_size == 2048)
sdkp->capacity <<= 2;
else if (sector_size == 1024)
sdkp->capacity <<= 1;
else if (sector_size == 256)
sdkp->capacity >>= 1;
For example, for a 4K-sector disk the "threshold" would be 16TB (2^12 *
2^32).
Paolo
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