On 07.10.2013 11:55, Paolo Bonzini wrote:
Il 07/10/2013 11:49, Peter Lieven ha scritto:
It's in general not easy to do this if you take non-x86 targets into
account.
What about the dirty way to zero out all non zero pages at the beginning of
ram_load?
I'm not sure I follow?
sth like this for each ram block at the beginning of ram_load.
+ base = memory_region_get_ram_ptr(block->mr);
+ for (offset = 0; offset < block->length;
+ offset += TARGET_PAGE_SIZE) {
+ if (!is_zero_page(base + offset)) {
+ memset(base + offset, 0x00, TARGET_PAGE_SIZE);
+ }
+ }
+
Then add a capability "skip_zero_pages" which does not sent them on the source
and enables this zeroing. it would also be possible to skip the zero check
for each incoming compressed pages.
Peter
