[Qemu-devel] [PATCH 0/2 v2][UPDATED] Open disk images with O_DIRECT

[Laurent Vivier]

These patches allow to open file using O_DIRECT and bypass the host I/O cache.

The v2 is a new version including comments from Anthony Liguori ("directio" 
has been renamed "cache"), from Balazs Attila-Mihaly (for Win32 support, 
not tested) and Samuel Thibault (for the generic function qemu_memalign()".

This version is an updated version with last CVS changes.

[PATCH 1/2] Add "cache" parameter to "-drive"

    Using "cache=off" with "-drive" will open the disk image 
    file using "O_DIRECT".

[PATCH 2/2] Direct IDE I/O

    This patch enhances the "-drive ,cache=off" mode with IDE drive emulation
    by removing the buffer used in the IDE emulation.

Laurent