}
/*
- * Queue work item to compress the existing log entries. We copy the
- * samples, and reset the log sample count to 0 (so the logging will
- * continue to use the memory associated with the log). If called with
- * wait == 1, will not return until the log compression has completed.
+ * Queue work item to compress the existing log entries. We reset the
+ * current log to a small size, and reference the existing log in the
+ * data that we queue for compression. Once compression has been done,
+ * this old log is freed. If called with wait == 1, will not return until
+ * the log compression has completed.
*/
int iolog_flush(struct io_log *log, int wait)
{
struct iolog_flush_data *data;
- size_t sample_size;
data = malloc(sizeof(*data));
if (!data)
data->log = log;
- sample_size = log->nr_samples * log_entry_sz(log);
- data->samples = malloc(sample_size);
- if (!data->samples) {
- free(data);
- return 1;
- }
-
- memcpy(data->samples, log->log, sample_size);
+ data->samples = log->log;
data->nr_samples = log->nr_samples;
+
log->nr_samples = 0;
+ log->max_samples = 128;
+ log->log = malloc(log->max_samples * log_entry_sz(log));
data->wait = wait;
if (data->wait) {