Re: [PATCH v6 1/4] xattr: extract simple_xattr code from tmpfs

[Hugh Dickins <hughd@google.com>]

On Thu, 16 Aug 2012, Tejun Heo wrote:
> On Thu, Aug 16, 2012 at 01:44:54PM -0400, aris@redhat.com wrote:
> > From: Li Zefan <lizefan@huawei.com>
> > 
> > Extract in-memory xattr APIs from tmpfs. Will be used by cgroup.
> > 
> > $ size vmlinux.o
> >    text    data     bss     dec     hex filename
> > 4658782  880729 5195032 10734543         a3cbcf vmlinux.o
> > $ size vmlinux.o
> >    text    data     bss     dec     hex filename
> > 4658957  880729 5195032 10734718         a3cc7e vmlinux.o
> > 
> > v6:
> > - no changes
> > v5:
> > - no changes
> > v4:
> > - move simple_xattrs_free() to fs/xattr.c
> > v3:
> > - in kmem_xattrs_free(), reinitialize the list
> > - use simple_xattr_* prefix
> > - introduce simple_xattr_add() to prevent direct list usage
> > 
> > Cc: Li Zefan <lizefan@huawei.com>
> > Cc: Tejun Heo <tj@kernel.org>
> > Cc: Hugh Dickins <hughd@google.com>
> 
> Hugh, can you please review and ack this one?

Yes, it looks nice to me.  I might have preferred more as inlines in
the header file to lower the slight init/evict overhead, and I don't
see why __simple_xattr_set() isn't using simple_xattr_alloc() in the
same way that shmem_xattr_set() used shmem_xattr_alloc().  But none
of that matters:

Acked-by: Hugh Dickins <hughd@google.com>