dump-guest-memory: add "detach" support
If "detach" is provided, one thread is created to do the dump work,
while main thread will return immediately. For each GuestPhysBlock,
adding one more field "mr" to points to MemoryRegion that it
belongs, also ref the mr before use.
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1455772616-8668-8-git-send-email-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/dump.c b/dump.c
index 923e3a5..9210a72 100644
--- a/dump.c
+++ b/dump.c
@@ -1643,6 +1643,20 @@
dump_cleanup(s);
}
+static void *dump_thread(void *data)
+{
+ Error *err = NULL;
+ DumpState *s = (DumpState *)data;
+
+ dump_process(s, &err);
+
+ if (err) {
+ /* TODO: notify user the error */
+ error_free(err);
+ }
+ return NULL;
+}
+
void qmp_dump_guest_memory(bool paging, const char *file,
bool has_detach, bool detach,
bool has_begin, int64_t begin, bool has_length,
@@ -1653,6 +1667,7 @@
int fd = -1;
DumpState *s;
Error *local_err = NULL;
+ bool detach_p = false;
if (runstate_check(RUN_STATE_INMIGRATE)) {
error_setg(errp, "Dump not allowed during incoming migration.");
@@ -1684,6 +1699,9 @@
error_setg(errp, QERR_MISSING_PARAMETER, "begin");
return;
}
+ if (has_detach) {
+ detach_p = detach;
+ }
/* check whether lzo/snappy is supported */
#ifndef CONFIG_LZO
@@ -1733,7 +1751,14 @@
return;
}
- dump_process(s, errp);
+ if (detach_p) {
+ /* detached dump */
+ qemu_thread_create(&s->dump_thread, "dump_thread", dump_thread,
+ s, QEMU_THREAD_DETACHED);
+ } else {
+ /* sync dump */
+ dump_process(s, errp);
+ }
}
DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp)