Merge "logd: pruning time horizon"
am: 183df3ddf7

* commit '183df3ddf72e5b7685f8fe4ae4c1f918968afa5d':
  logd: pruning time horizon
diff --git a/logd/LogBuffer.cpp b/logd/LogBuffer.cpp
index 1de8e64..4ada788 100644
--- a/logd/LogBuffer.cpp
+++ b/logd/LogBuffer.cpp
@@ -436,7 +436,10 @@
                     worst_sizes = sorted[0]->getSizes();
                     // Calculate threshold as 12.5% of available storage
                     size_t threshold = log_buffer_size(id) / 8;
-                    if (worst_sizes > threshold) {
+                    if ((worst_sizes > threshold)
+                        // Allow time horizon to extend roughly tenfold, assume
+                        // average entry length is 100 characters.
+                            && (worst_sizes > (10 * sorted[0]->getDropped()))) {
                         worst = sorted[0]->getKey();
                         second_worst_sizes = sorted[1]->getSizes();
                         if (second_worst_sizes < threshold) {