On Wed, 25 Jul 2007, Benjamin Herrenschmidt wrote: > > In fact, i discussed with peter and I think the best is to only have one > entry in the stack mmu_gather structure.
Four or eight would be much nicer than one, but you're right there's a stackdepth worry: good spotting of those unmap_mapping_range cases, I'd certainly been thinking we were fairly near the top of the stack in unmap_vmas, which is not so (or not obviously so) in those cases. > If we fail to allocate a page > to batch entries, we flush that one and steal it :-) Then we have a page > to gather more. That will often be the case for anonymous pages, but not for pagecache pages. I had wondered whether to make exit_mmap unmap the stack first (rather than text first as usually happens), but seems rather a hack. Hugh - 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/
