LU-4578 ptlrpc: Early replies need to honor at_max

[fs/lustre-release.git] / lustre / ptlrpc / import.c

diff --git a/lustre/ptlrpc/import.c b/lustre/ptlrpc/import.c
index 40753de..81cf710 100644 (file)
--- a/lustre/ptlrpc/import.c
+++ b/lustre/ptlrpc/import.c
@@ -1544,10 +1544,13 @@ EXPORT_SYMBOL(ptlrpc_cleanup_imp);
 /* Adaptive Timeout utils */
 extern unsigned int at_min, at_max, at_history;
 
-/* Bin into timeslices using AT_BINS bins.
-   This gives us a max of the last binlimit*AT_BINS secs without the storage,
-   but still smoothing out a return to normalcy from a slow response.
-   (E.g. remember the maximum latency in each minute of the last 4 minutes.) */
+/* Update at_current with the specified value (bounded by at_min and at_max),
+ * as well as the AT history "bins".
+ *  - Bin into timeslices using AT_BINS bins.
+ *  - This gives us a max of the last at_history seconds without the storage,
+ *    but still smoothing out a return to normalcy from a slow response.
+ *  - (E.g. remember the maximum latency in each minute of the last 4 minutes.)
+ */
 int at_measured(struct adaptive_timeout *at, unsigned int val)
 {
         unsigned int old = at->at_current;