[PATCH] Add some comments to slab.c
Also, checks if we get a valid slabp_cache for off slab slab-descriptors. We should always get this. If we don't, then in that case we, will have to disable off-slab descriptors for this cache and do the calculations again. This is a rare case, so add a BUG_ON, for now, just in case. Signed-off-by: NAlok N Kataria <alok.kataria@calsoftinc.com> Signed-off-by: NRavikiran Thirumalai <kiran@scalex86.org> Signed-off-by: NShai Fultheim <shai@scalex86.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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