Christoph Lameter wrote:
On Tue, 14 Aug 2007, Luck, Tony wrote:
I re-tried the macros ... the three warnings from mm/slub.c all result in
broken code ... and quite rightly too, they all come from code that does:
atomic_read(&n->nr_slabs)
But the nr_slabs field is an atomic_long_t, so we shouldn't be using
atomic_read(). I didn't spot these last time around because I was using
slab, not slub for the previous build.
Hmmmm... Strange that this did not cause failures before on any other
platforms?
Prior to the patch in question, atomic_read was a macro. I didn't use slub in
my cursory testing. Tony had ia64 under a microscope because of the tricky
memory access ordering semantics of that architecture.
-- Chris
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