ZIGLIO, Frediano, VF-IT wrote:
Hi, well, this is not a definitive patch but it works. The aim is to be able to wipe the disk without allocating entire space. When you wipe a disk the program fill disk with zero bytes so disk image increase to allocate all space. This just patch detect null byte writes and do not write all zero byte clusters.
I've been giving this some pretty heavy testing over the last week and can say I've not noticed any negative performance impact or any other adverse side effects, not to mention the speedup when doing re-packing (which I do fairly regularly on both ext3 and ntfs guest filesystems).
While I'm here does anyone know of a simple program, either dos or linux based for wiping unused space on fat filesystems? The only ones I've found so far have been windows based.
This patch now conflicts pretty heavily with the new AIO changes it would seem. Further investigation required.
Ta, Brad -- "Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so." -- Douglas Adams _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
