On Fri, Nov 23, 2018 at 01:23:41PM +0100, Vlastimil Babka wrote: > Is this also true for caches created by kmem_cache_create(), that > debugging options can result in not respecting the alignment passed to > kmem_cache_create()? That would be rather bad, IMHO. That's what I understood in the discussion. If not it would make our live simpler, but would need to be well document. Christoph can probably explain the alignment choices in slub. > > > But I do agree with the sentiment of not wanting to spread GFP_DMA32 > > futher into the slab allocator. > > I don't see a problem with GFP_DMA32 for custom caches. Generic > kmalloc() would be worse, since it would have to create a new array of > kmalloc caches. But that's already ruled out due to the alignment. True, purely slab probably isn't too bad.
