Subject: Re: linux-next: manual merge of the vfs tree with the ext4 tree

From: Al Viro <[email-masked]>
Date: Tue, 14 Apr 2015 22:14:56 +0100

On Tue, Apr 14, 2015 at 05:02:15PM -0400, Theodore Ts'o wrote:
> On Tue, Apr 14, 2015 at 06:17:43PM +0100, Al Viro wrote:
> > Except that you do not handle the slow unencrypted case - you end up with
> > kfree() on the freshly kunmaped address.
> 
> Ah, right, we're actually kmalloc'ing the space that case as well ---
> so hanging on the cpage is pointless; which was the point you were
> making.   Sorry, I was being slow.
> 
> So what we have works, but it's not optimal.  Will fix.

BTW, take a look at kfree_put_link(); no need to reinvent that wheel...