fater way to detect last page address for the last log file.

gprof build for amd64.


storage/maria/ma_loghandler.c:
  fater way to detect last page address for the last log file.
BUILD/compile-amd64-gprof-no-ndb:
  New BitKeeper file ``BUILD/compile-amd64-gprof-no-ndb''

BUILD/compile-amd64-gprof-no-ndb

+#! /bin/sh
+path=`dirname $0`
+. "$path/SETUP.sh"
+extra_flags="$amd64_cflags -pg -g"
+extra_configs="$amd64_configs $max_no_ndb_configs --disable-shared $static_link"
+
+. "$path/FINISH.sh"

storage/maria/ma_loghandler.c

@@ -5185,6 +5185,14 @@ static my_bool translog_scanner_set_last_page(TRANSLOG_SCANNER_DATA
                                               *scanner)
 {
   my_bool page_ok;
+  if (LSN_FILE_NO(scanner->page_addr) == LSN_FILE_NO(scanner->horizon))
+  {
+    /* It is last file => we can easy find last page address by horizon */
+    uint pagegrest= LSN_OFFSET(scanner->horizon) % TRANSLOG_PAGE_SIZE;
+    scanner->last_file_page= (scanner->horizon -
+                              (pagegrest ? pagegrest : TRANSLOG_PAGE_SIZE));
+    return (0);
+  }
   scanner->last_file_page= scanner->page_addr;
   return (translog_get_last_page_addr(&scanner->last_file_page, &page_ok));
 }