On 12/21/2011 05:55 PM, Christoph Hellwig wrote:
On Wed, Dec 14, 2011 at 01:40:22PM +0100, Paolo Bonzini wrote:
If the partitions are aligned, the OS will always issue aligned requests,
because file system blocks are already 4k.
It won't nessecarily. For example XFS will do a fair amount of sub-blocksize
I/O for metadata and the log. Note that if you tell XFS that the
minimal_io_size is 4k it will at least align the log write to it, which
is what really matters.
The physical_block_size doesn't matter?
Paolo
