LU-10463 osd-zfs: use 1MB RPC size by default

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c

diff --git a/lustre/osd-ldiskfs/osd_handler.c b/lustre/osd-ldiskfs/osd_handler.c
index 6e310dc..cf8e476 100644 (file)
--- a/lustre/osd-ldiskfs/osd_handler.c
+++ b/lustre/osd-ldiskfs/osd_handler.c
@@ -2120,6 +2120,16 @@ static void osd_conf_get(const struct lu_env *env,
        else
 #endif
                param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
+
+       /* Preferred RPC size for efficient disk IO.  4MB shows good
+        * all-around performance for ldiskfs, but use bigalloc chunk size
+        * by default if larger. */
+#if defined(LDISKFS_CLUSTER_SIZE)
+       if (LDISKFS_CLUSTER_SIZE(sb) > DT_DEF_BRW_SIZE)
+               param->ddp_brw_size = LDISKFS_CLUSTER_SIZE(sb);
+       else
+#endif
+               param->ddp_brw_size = DT_DEF_BRW_SIZE;
 }
 
 /*