Re: [RFC] Common code 09/12] slabs: Extract a common function for kmem_cache_destroy

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On Mon, 21 May 2012, Glauber Costa wrote:

> On 05/21/2012 10:13 PM, Christoph Lameter wrote:
> > > So unless I am missing something, it seems to me the correct code would
> > > be:
> > > >
> > > >  s->refcount--;
> > > >  if (!s->refcount)
> > > >       return kmem_cache_close;
> > > >  return 0;
> > > >
> > > >  And while we're on that, that makes the sequence list_del() ->  if it
> > > fails ->
> > > >  list_add() in the common kmem_cache_destroy a bit clumsy. Aliases will
> > > be
> > > >  re-added to the list quite frequently. Not that it is a big problem,
> > > but
> > > >  still...
> > True but this is just an intermediate step. Ultimately the series will
> > move sysfs processing into slab_common.c and then this is going away.
> >
>
> But until then, people bisecting into this patch will find a broken state,
> right?

I thought this was about clumsiness not breakage. What is broken? Aliases
do not affect the call to __kmem_cache_shutdown. Its only called if there
are no aliases anymore.


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