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Revision 7229


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Author: aliguori
Date: Wed Apr 22 20:20:00 2009 UTC (14 years, 7 months ago)
Changed paths: 6
Log Message:
implement qemu_blockalign (Stefano Stabellini)

this patch adds a buffer_alignment field to BlockDriverState and
implements a qemu_blockalign function that uses that field to allocate a
memory aligned buffer to be used by the block driver.
buffer_alignment is initialized to 512 but each block driver can set
a different value (at the moment none of them do).
This patch modifies ide.c, block-qcow.c, block-qcow2.c and block.c to
use qemu_blockalign instead of qemu_memalign.
There is only one place left that still uses qemu_memalign to allocate
buffers used by block drivers that is posix-aio-compat:handle_aiocb_rw
because it is not possible to get the BlockDriverState from that
function. However I think it is not important because posix-aio-compat
already deals with driver specific code so it is supposed to know its
own needs.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Changed paths:

Path Details
Directorytrunk/block-qcow.c modified , text changed
Directorytrunk/block-qcow2.c modified , text changed
Directorytrunk/block-raw-posix.c modified , text changed
Directorytrunk/block.c modified , text changed
Directorytrunk/block_int.h modified , text changed
Directorytrunk/hw/ide.c modified , text changed

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