| commit | c25f53b06eba1575d5d0e92a0132455c97825b83 | |
| author | Paolo Bonzini <pbonzini@redhat.com> | |
| Tue, 29 Nov 2011 11:42:20 +0000 (29 12:42 +0100) | ||
| committer | Kevin Wolf <kwolf@redhat.com> | |
| Fri, 24 Jan 2014 16:40:02 +0000 (24 17:40 +0100) | ||
| tree | cf2b0c8ed726159431608cf097f9c89d022104aa | treesnapshot (tar.gz zip) |
| parent | 1b7fd729559c6d3b273303aa48bc653ceef08747 | commitdiff |
raw: Probe required direct I/O alignment
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 <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@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 <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
| block.c | diffblobblamehistory | |
| block/raw-posix.c | diffblobblamehistory | |
| block/raw-win32.c | diffblobblamehistory | |
| include/block/block_int.h | diffblobblamehistory |