linux-kernel - Re: [PATCH v7 1/4] xattr: extract simple

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Date:	Thu, 23 Aug 2012 16:14:24 -0700 (PDT)
From:	Hugh Dickins <hughd@...gle.com>
To:	aris@...hat.com
cc:	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	Li Zefan <lizefan@...wei.com>, Tejun Heo <tj@...nel.org>,
	Hugh Dickins <hughd@...gle.com>,
	Hillf Danton <dhillf@...il.com>,
	Lennart Poettering <lpoetter@...hat.com>
Subject: Re: [PATCH v7 1/4] xattr: extract simple_xattr code from tmpfs

On Thu, 23 Aug 2012, aris@...hat.com wrote:
> From: Li Zefan <lizefan@...wei.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
> 
> v7:
> - checkpatch warnings fixed
> - Implement the changes requested by Hugh Dickins:
> 	- make simple_xattrs_init and simple_xattrs_free inline
> 	- get rid of locking and list reinitialization in simple_xattrs_free,
> 	  they're not needed

Thanks for doing those.

I'm also happy to see that you're now using simple_xattr_alloc() in
__simple_xattr_set() (but no need to respin to comment on that here).

It looks very nice: much better for this code to live in fs/xattr.c
than in mm/shmem.c.

> 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@...wei.com>
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Hugh Dickins <hughd@...gle.com>

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

> Cc: Hillf Danton <dhillf@...il.com>
> Cc: Lennart Poettering <lpoetter@...hat.com>
> Signed-off-by: Li Zefan <lizefan@...wei.com>
> Signed-off-by: Aristeu Rozanski <aris@...hat.com>
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