shithub: lwext4

Download patch

ref: 74d0e84547710dcb8bc93b23aa0a5c9450af52a9
parent: 914d1a53f60d476c1bbdb6a666277780b88ed313
author: gkostka <[email protected]>
date: Fri Jan 17 13:56:23 EST 2014 

Better caching method for fopen.


--- a/lwext4/ext4.c
+++ b/lwext4/ext4.c
@@ -660,13 +660,8 @@
 

         if((f->flags & O_TRUNC) &&

                 (inode_type == EXT4_DIRECTORY_FILETYPE_REG_FILE)){

-            /*Turncate.*/

-            ext4_block_delay_cache_flush(mp->fs.bdev, 1);

-            /*Truncate may be IO heavy.

-             Do it with delayed cache flush mode.*/

-            r = ext4_fs_truncate_inode(&ref, 0);

-            ext4_block_delay_cache_flush(mp->fs.bdev, 0);

 

+            r = ext4_fs_truncate_inode(&ref, 0);

             if(r != EOK){

                 ext4_fs_put_inode_ref(&ref);

                 return r;

@@ -766,7 +761,9 @@
         return ENOENT;

 

     EXT4_MP_LOCK(mp);

+    ext4_block_delay_cache_flush(mp->fs.bdev, 1);

     r = ext4_generic_open(f, path, flags, true, 0, 0);

+    ext4_block_delay_cache_flush(mp->fs.bdev, 0);

     EXT4_MP_UNLOCK(mp);

     return r;

 }