Changeset dba4a23 in mainline for uspace/srv/fs/fat/fat_ops.c

Timestamp:

2010-07-28T15:22:22Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

4637c72, 9a1d8ab

Parents:

6da81e0

Message:

Speed up sequential I/O by caching the "current" cluster in fat_block_get().
This improves sequentil read of a 5m file (using the cat command) by 45 seconds
(73s → 28s).

File:

• uspace/srv/fs/fat/fat_ops.c (modified) (1 diff)

uspace/srv/fs/fat/fat_ops.c

@@ -106 +106 @@
         node->lastc_cached_valid = false;
         node->lastc_cached_value = FAT_CLST_LAST1;
+        node->currc_cached_valid = false;
+        node->currc_cached_bn = 0;
+        node->currc_cached_value = FAT_CLST_LAST1;
 }