shithub: lwext4

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1. Extra directory remove caching.
2. Faster inode allocation (but worse inode distribution)

--- a/lwext4/ext4.c

+++ b/lwext4/ext4.c

@@ -1167,6 +1167,9 @@

     inode_current = f.inode;

     dir_end = false;

+

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

+

     do {

         /*Load directory node.*/

         r = ext4_fs_get_inode_ref(&f.mp->fs, inode_current, &current);

@@ -1300,7 +1303,7 @@

     }while(depth);

-

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

     EXT4_MP_UNLOCK(mp);

     return r;

 }

--- a/lwext4/ext4_ialloc.c

+++ b/lwext4/ext4_ialloc.c

@@ -186,7 +186,7 @@

         uint32_t used_dirs = ext4_bg_get_used_dirs_count(bg, sb);

         /* Check if this block group is good candidate for allocation */

-        if (free_inodes >= avg_free_inodes) {

+        if (free_inodes > 0) {

             /* Load block with bitmap */

             uint32_t bitmap_block_addr = ext4_bg_get_inode_bitmap(

                     bg_ref.block_group, sb);