Hi Neil! On Tue, Apr 13, 2010 at 04:18:02PM +1000, Neil Brown wrote: > Actually I don't think that would be hard at all. > ->lookup can return a different dentry than the one passed in, usually using > d_splice_alias to find it. > So when you create an inode for a directory, create an anonymous dentry, > attach it via i_dentry, and it should "just work". > That is assuming this is still a "problem" that needs to be "fixed". I'm not sure if changing the slab object will make a whole lot of difference, because antifrag will threat all unmovable stuff the same. To make a difference directories should go in a different 2M page of the inodes, and that would require changes to the slab code to achieve I guess. However while I doubt it helps with hugepage fragmentation because of the above, it still sounds a good idea to provide more "free memory" to the system with less effort and while preserving more cache. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>