Re: [PATCH] slub: /proc/slabinfo ABI compatibility

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On Mon, 24 Dec 2007, Pekka Enberg wrote:

> On Dec 24, 2007 9:12 PM, Christoph Lameter <[email protected]> wrote:
> > Hmmm... What is the combination of config variables that causes this? I
> > moved the count_partial function in mm in order to make the merge of slab
> > defrag easier.
> 
> I think it's CONFIG_PROC_FS without CONFIG_SYSFS.

The only user of count_partial is in slab_objects() which is in a 
section that is

#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)

There should be no use if CONFIG_SYSFS is not set. I think we get a 
warning about a function that is never called when compiling the current 
mm code without SLUB_DEBUG or CONFIG_SYSFS (because the slab defrag use 
has not been merged yet).

In mm count_partial() is always defined. In Linus tree count_partial() 
comes just before slab_objects().

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