Am 26/08/2022 um 16:15 schrieb David Hildenbrand: > On 16.08.22 12:12, Emanuele Giuseppe Esposito wrote: >> Instead of sending a single ioctl every time ->region_* or ->log_* >> callbacks are called, "queue" all memory regions in a list that will >> be emptied only when committing. >> > > Out of interest, how many such regions does the ioctl support? As many > as KVM theoretically supports? (32k IIRC) > I assume you mean for the new ioctl, but yes that's a good question. The problem here is that we could have more than a single update per memory region. So we are not limited anymore to the number of regions, but the number of operations * number of region. I was thinking, maybe when pre-processing QEMU could divide a single transaction into multiple atomic operations (ie operations on the same memory region)? That way avoid sending a single ioctl with 32k * #operation elements. Is that what you mean? Emanuele
