On Sun, Oct 2, 2011 at 8:41 PM, Avi Kivity <a...@redhat.com> wrote: >> > >> > >> > Would not this corruption also happen on real hardware? If reset >> > to the disk controller is delayed by a slow gate or extra >> > capacitance on a line? >> >> Maybe, but the delays are probably too short on real HW before any >> packets are sent or disk gets written. On QEMU, I/O can be >> instantaneous. >> > > Right, this is a real difference. If any hardware actually depends on this, > we can model it by launching a timer instead of issuing the I/O. When the > reset arrives to the disk controller, it will cancel the timer. > > This is expensive both to code and in run-time performance, but we can afford > the expense since we don't have such a case, yes?
It's already in, see -win2k-hack and floppy DMA hack.
