On Fri, 2007-05-04 at 09:23 -0700, Christoph Lameter wrote:
> On Fri, 4 May 2007, Peter Zijlstra wrote:
>
> > On Fri, 2007-05-04 at 09:09 -0700, Christoph Lameter wrote:
> > > On Fri, 4 May 2007, Pekka Enberg wrote:
> > >
> > > > On 5/4/07, Peter Zijlstra <[email protected]> wrote:
> > > > > Expost buffer_size in order to allow fair estimates on the actual space
> > > > > used/needed.
> > >
> > > We already have ksize?
> >
> > ksize gives the internal size, whereas these give the external size.
> >
> > I need to know how much space I need to reserve, hence I need the
> > external size; whereas normally you want to know how much space you have
> > available, which is what ksize gives.
> >
> > Didn't we have this discussion last time?
>
> I was cced on that as far as I can tell.
Ah, that might have been, I was collecting Cc's but must've overlooked
you. My bad.
> The name objsize suggests the size of the object not the slab size.
> If you want this then maybe call it kmem_cache_slab_size. SLUB
> distinguishes between obj_size which is the size of the struct that is
> used and slab_size which is the size of the object after alignment, adding
> debug information etc etc. See also slabinfo.c for a way to calculate
> theses sizes from user space.
I'm open to renames, this is what Pekka suggested IIRC.
> If we really drop SLAB then we wont need this. SLUBs data structures are
> not opaque.
Yeah, I know, I still have to add SLUB support, its high on my TODO list
though.
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