LU-13799 lov: Cache stripe offset calculation

[fs/lustre-release.git] / lustre / lov / lov_cl_internal.h

diff --git a/lustre/lov/lov_cl_internal.h b/lustre/lov/lov_cl_internal.h
index 40a5836..9563315 100644 (file)
--- a/lustre/lov/lov_cl_internal.h
+++ b/lustre/lov/lov_cl_internal.h
@@ -450,8 +450,6 @@ struct lov_lock {
 
 struct lov_page {
        struct cl_page_slice    lps_cl;
-       /* the layout gen when this page was created */
-       __u32                   lps_layout_gen;
 };
 
 /*
@@ -521,6 +519,7 @@ struct lov_io_sub {
 /**
  * IO state private for LOV.
  */
+#define LIS_CACHE_ENTRY_NONE   -ENOENT
 struct lov_io {
         /** super-class */
         struct cl_io_slice lis_cl;
@@ -586,7 +585,12 @@ struct lov_io {
         * All sub-io's created in this lov_io.
         */
        struct list_head        lis_subios;
-
+       /* Cached results from stripe & offset calculations for page init */
+       int                     lis_cached_entry;
+       int                     lis_cached_stripe;
+       loff_t                  lis_cached_off;
+       loff_t                  lis_cached_suboff;
+       struct lov_io_sub       *lis_cached_sub;
 };
 
 struct lov_session {