On 13.12.2013 14:22, Kevin Wolf wrote:
From: Paolo Bonzini <pbonz...@redhat.com>

Add a bs->request_alignment field that contains the required
offset/length alignment for I/O requests and fill it in the raw block
drivers. Use ioctls if possible, else see what alignment it takes for
O_DIRECT to succeed.

While at it, also expose the memory alignment requirements, which may be
(and in practice are) different from the disk alignment requirements.

Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
  block.c                   |   3 ++
  block/raw-posix.c         | 102 ++++++++++++++++++++++++++++++++++++++--------
  block/raw-win32.c         |  41 +++++++++++++++++++
  include/block/block_int.h |   3 ++
  4 files changed, 132 insertions(+), 17 deletions(-)

Reviewed-by: Max Reitz <mre...@redhat.com>

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