@@ -770,6 +770,21 @@ static inline void *host_from_stream_offset(QEMUFile *f,
return NULL;
}
+/*
+ * If a page (or a whole RDMA chunk) has been
+ * determined to be zero, then zap it.
+ */
+void ram_handle_compressed(void *host, uint8_t ch, uint64_t size)
+{
+ memset(host, ch, TARGET_PAGE_SIZE);
+#ifndef _WIN32
+ if (ch == 0 && (!kvm_enabled() || kvm_has_sync_mmu()) &&
+ getpagesize() <= TARGET_PAGE_SIZE) {
+ qemu_madvise(host, size, QEMU_MADV_DONTNEED);
+ }
+#endif
+}
+
static int ram_load(QEMUFile *f, void *opaque, int version_id)
{
ram_addr_t addr;
@@ -837,14 +852,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
}
ch = qemu_get_byte(f);
- memset(host, ch, TARGET_PAGE_SIZE);
-#ifndef _WIN32
- if (ch == 0 &&
- (!kvm_enabled() || kvm_has_sync_mmu()) &&
- getpagesize() <= TARGET_PAGE_SIZE) {
- qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
- }
-#endif
+ ram_handle_compressed(host, ch, TARGET_PAGE_SIZE);
} else if (flags & RAM_SAVE_FLAG_PAGE) {
void *host;
@@ -127,4 +127,6 @@ int migrate_use_xbzrle(void);
int64_t migrate_xbzrle_cache_size(void);
int64_t xbzrle_cache_resize(int64_t new_size);
+
+void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
#endif