Messages in this thread | | | Date | Wed, 26 Nov 2003 18:25:53 +1100 | From | Anton Blanchard <> | Subject | Re: hash table sizes |
| |
> That was a concern to me too. However, on IA64, all page structs are > in the vmalloc region (it isnt allocated by vmalloc but is in the same > region as vmalloc'ed pages. They are mapped with 16k pages instead of > the 64MB pages used for memory allocated by kmalloc). > > Before switching to 16K pages for the page structs, we made numerous > performance measurements. As far as we could tell, there was no > performce degradation caused by the smaller pages. It seems to me that > if page structs are ok being mapped by 16k pages, the hash tables > would be ok too.
OK, on ppc64 with a 4kB base pagesize Id be more worried about using the vmalloc region.
Anton - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |