"Loïc Grenié" <[EMAIL PROTECTED]> writes: > Since GFP_DMA32 is not considered a valid flag, vmalloc_32 and > SLAB are incompatible in kernel 2.6.23.9 (and probably later ones). > It might be as simple as adding GFP_DMA32 everywhere where > GFP_DMA is used in mm/slab.c, but I don't dare do it. I personally > switched to SLUB.
I don't think it would really work for slub either. If you look at /proc/slabinfo you see that there are separate DMA caches. That is because sl[abo]b all cache objects and if the objects have different requirements (like GFP_DMA, GFP_DMA32, GFP_KERNEL) they would need different caches. Otherwise you risk getting later objects originally allocated with the wrong flags. To make GFP_DMA32 work would require adding another set of DMA32 caches to all kmalloc caches etc or a separate one for each custom kmem cache that you use that only gets _DMA32 objects. Better just use __get_free_pages() directly. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
